b6db84e916
Be more compatible with the Go toolchain by setting GOPATH in the same way. This makes it possible to flash and run examples from the standard GOPATH instead of only from the source tree.
3157 строки
107 КиБ
Go
3157 строки
107 КиБ
Go
package compiler
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import (
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"errors"
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"fmt"
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"go/build"
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"go/constant"
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"go/token"
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"go/types"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"github.com/aykevl/llvm/bindings/go/llvm"
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"github.com/aykevl/tinygo/ir"
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"go/parser"
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"golang.org/x/tools/go/loader"
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"golang.org/x/tools/go/ssa"
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)
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func init() {
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llvm.InitializeAllTargets()
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llvm.InitializeAllTargetMCs()
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llvm.InitializeAllTargetInfos()
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llvm.InitializeAllAsmParsers()
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llvm.InitializeAllAsmPrinters()
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}
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// Configure the compiler.
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type Config struct {
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Triple string // LLVM target triple, e.g. x86_64-unknown-linux-gnu (empty string means default)
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DumpSSA bool // dump Go SSA, for compiler debugging
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Debug bool // add debug symbols for gdb
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RootDir string // GOROOT for TinyGo
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GOPATH string // GOPATH, like `go env GOPATH`
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BuildTags []string // build tags for TinyGo (empty means {runtime.GOOS/runtime.GOARCH})
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}
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type Compiler struct {
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Config
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mod llvm.Module
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ctx llvm.Context
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builder llvm.Builder
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dibuilder *llvm.DIBuilder
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cu llvm.Metadata
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difiles map[string]llvm.Metadata
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ditypes map[string]llvm.Metadata
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machine llvm.TargetMachine
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targetData llvm.TargetData
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intType llvm.Type
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i8ptrType llvm.Type // for convenience
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uintptrType llvm.Type
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lenType llvm.Type
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coroIdFunc llvm.Value
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coroSizeFunc llvm.Value
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coroBeginFunc llvm.Value
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coroSuspendFunc llvm.Value
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coroEndFunc llvm.Value
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coroFreeFunc llvm.Value
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initFuncs []llvm.Value
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deferFuncs []*ir.Function
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ir *ir.Program
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}
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type Frame struct {
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fn *ir.Function
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locals map[ssa.Value]llvm.Value // local variables
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blocks map[*ssa.BasicBlock]llvm.BasicBlock
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currentBlock *ssa.BasicBlock
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phis []Phi
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blocking bool
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taskHandle llvm.Value
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cleanupBlock llvm.BasicBlock
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suspendBlock llvm.BasicBlock
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deferPtr llvm.Value
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difunc llvm.Metadata
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}
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type Phi struct {
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ssa *ssa.Phi
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llvm llvm.Value
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}
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func NewCompiler(pkgName string, config Config) (*Compiler, error) {
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if config.Triple == "" {
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config.Triple = llvm.DefaultTargetTriple()
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}
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if len(config.BuildTags) == 0 {
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config.BuildTags = []string{runtime.GOOS, runtime.GOARCH}
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}
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c := &Compiler{
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Config: config,
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difiles: make(map[string]llvm.Metadata),
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ditypes: make(map[string]llvm.Metadata),
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}
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target, err := llvm.GetTargetFromTriple(config.Triple)
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if err != nil {
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return nil, err
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}
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c.machine = target.CreateTargetMachine(config.Triple, "", "", llvm.CodeGenLevelDefault, llvm.RelocStatic, llvm.CodeModelDefault)
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c.targetData = c.machine.CreateTargetData()
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c.mod = llvm.NewModule(pkgName)
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c.mod.SetTarget(config.Triple)
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c.mod.SetDataLayout(c.targetData.String())
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c.ctx = c.mod.Context()
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c.builder = c.ctx.NewBuilder()
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c.dibuilder = llvm.NewDIBuilder(c.mod)
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// Depends on platform (32bit or 64bit), but fix it here for now.
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c.intType = llvm.Int32Type()
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c.uintptrType = c.targetData.IntPtrType()
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if c.targetData.PointerSize() < 4 {
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// 16 or 8 bits target with smaller length type
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c.lenType = c.uintptrType
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} else {
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c.lenType = llvm.Int32Type() // also defined as runtime.lenType
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}
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c.i8ptrType = llvm.PointerType(llvm.Int8Type(), 0)
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coroIdType := llvm.FunctionType(c.ctx.TokenType(), []llvm.Type{llvm.Int32Type(), c.i8ptrType, c.i8ptrType, c.i8ptrType}, false)
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c.coroIdFunc = llvm.AddFunction(c.mod, "llvm.coro.id", coroIdType)
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coroSizeType := llvm.FunctionType(llvm.Int32Type(), nil, false)
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c.coroSizeFunc = llvm.AddFunction(c.mod, "llvm.coro.size.i32", coroSizeType)
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coroBeginType := llvm.FunctionType(c.i8ptrType, []llvm.Type{c.ctx.TokenType(), c.i8ptrType}, false)
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c.coroBeginFunc = llvm.AddFunction(c.mod, "llvm.coro.begin", coroBeginType)
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coroSuspendType := llvm.FunctionType(llvm.Int8Type(), []llvm.Type{c.ctx.TokenType(), llvm.Int1Type()}, false)
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c.coroSuspendFunc = llvm.AddFunction(c.mod, "llvm.coro.suspend", coroSuspendType)
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coroEndType := llvm.FunctionType(llvm.Int1Type(), []llvm.Type{c.i8ptrType, llvm.Int1Type()}, false)
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c.coroEndFunc = llvm.AddFunction(c.mod, "llvm.coro.end", coroEndType)
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coroFreeType := llvm.FunctionType(c.i8ptrType, []llvm.Type{c.ctx.TokenType(), c.i8ptrType}, false)
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c.coroFreeFunc = llvm.AddFunction(c.mod, "llvm.coro.free", coroFreeType)
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return c, nil
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}
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// Return the LLVM module. Only valid after a successful compile.
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func (c *Compiler) Module() llvm.Module {
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return c.mod
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}
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// Compile the given package path or .go file path. Return an error when this
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// fails (in any stage).
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func (c *Compiler) Compile(mainPath string) error {
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tripleSplit := strings.Split(c.Triple, "-")
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// Prefix the GOPATH with the system GOROOT, as GOROOT is already set to
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// the TinyGo root.
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gopath := c.GOPATH
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if gopath == "" {
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gopath = runtime.GOROOT()
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} else {
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gopath = runtime.GOROOT() + string(filepath.ListSeparator) + gopath
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}
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config := loader.Config{
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TypeChecker: types.Config{
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Sizes: &StdSizes{
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IntSize: int64(c.targetData.TypeAllocSize(c.intType)),
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PtrSize: int64(c.targetData.PointerSize()),
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MaxAlign: int64(c.targetData.PrefTypeAlignment(c.i8ptrType)),
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},
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},
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Build: &build.Context{
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GOARCH: tripleSplit[0],
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GOOS: tripleSplit[2],
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GOROOT: c.RootDir,
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GOPATH: gopath,
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CgoEnabled: true,
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UseAllFiles: false,
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Compiler: "gc", // must be one of the recognized compilers
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BuildTags: append([]string{"tgo"}, c.BuildTags...),
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},
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ParserMode: parser.ParseComments,
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}
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config.Import("runtime")
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if strings.HasSuffix(mainPath, ".go") {
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config.CreateFromFilenames("main", mainPath)
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} else {
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config.Import(mainPath)
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}
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lprogram, err := config.Load()
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if err != nil {
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return err
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}
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c.ir = ir.NewProgram(lprogram, mainPath)
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// Run some DCE and analysis passes. The results are later used by the
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// compiler.
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c.ir.SimpleDCE() // remove most dead code
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c.ir.AnalyseCallgraph() // set up callgraph
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c.ir.AnalyseInterfaceConversions() // determine which types are converted to an interface
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c.ir.AnalyseFunctionPointers() // determine which function pointer signatures need context
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c.ir.AnalyseBlockingRecursive() // make all parents of blocking calls blocking (transitively)
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c.ir.AnalyseGoCalls() // check whether we need a scheduler
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// Initialize debug information.
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c.cu = c.dibuilder.CreateCompileUnit(llvm.DICompileUnit{
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Language: llvm.DW_LANG_Go,
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File: mainPath,
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Dir: "",
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Producer: "TinyGo",
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Optimized: true,
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})
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var frames []*Frame
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// Declare all named struct types.
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for _, t := range c.ir.NamedTypes {
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if named, ok := t.Type.Type().(*types.Named); ok {
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if _, ok := named.Underlying().(*types.Struct); ok {
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t.LLVMType = c.ctx.StructCreateNamed(named.Obj().Pkg().Path() + "." + named.Obj().Name())
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}
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}
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}
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// Define all named struct types.
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for _, t := range c.ir.NamedTypes {
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if named, ok := t.Type.Type().(*types.Named); ok {
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if st, ok := named.Underlying().(*types.Struct); ok {
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llvmType, err := c.getLLVMType(st)
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if err != nil {
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return err
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}
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t.LLVMType.StructSetBody(llvmType.StructElementTypes(), false)
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}
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}
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}
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// Declare all globals. These will get an initializer when parsing "package
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// initializer" functions.
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for _, g := range c.ir.Globals {
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typ := g.Type().(*types.Pointer).Elem()
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llvmType, err := c.getLLVMType(typ)
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if err != nil {
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return err
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}
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global := c.mod.NamedGlobal(g.LinkName())
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if global.IsNil() {
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global = llvm.AddGlobal(c.mod, llvmType, g.LinkName())
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}
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g.LLVMGlobal = global
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if !g.IsExtern() {
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global.SetLinkage(llvm.InternalLinkage)
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initializer, err := getZeroValue(llvmType)
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if err != nil {
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return err
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}
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global.SetInitializer(initializer)
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}
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}
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// Declare all functions.
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for _, f := range c.ir.Functions {
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frame, err := c.parseFuncDecl(f)
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if err != nil {
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return err
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}
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frames = append(frames, frame)
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}
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// Find and interpret package initializers.
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for _, frame := range frames {
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if frame.fn.Synthetic == "package initializer" {
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c.initFuncs = append(c.initFuncs, frame.fn.LLVMFn)
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if len(frame.fn.Blocks) != 1 {
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panic("unexpected number of basic blocks in package initializer")
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}
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// Try to interpret as much as possible of the init() function.
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// Whenever it hits an instruction that it doesn't understand, it
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// bails out and leaves the rest to the compiler (so initialization
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// continues at runtime).
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// This should only happen when it hits a function call or the end
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// of the block, ideally.
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err := c.ir.Interpret(frame.fn.Blocks[0], c.DumpSSA)
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if err != nil {
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return err
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}
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err = c.parseFunc(frame)
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if err != nil {
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return err
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}
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}
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}
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// Set values for globals (after package initializer has been interpreted).
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for _, g := range c.ir.Globals {
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if g.Initializer() == nil {
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continue
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}
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err := c.parseGlobalInitializer(g)
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if err != nil {
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return err
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}
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}
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// Add definitions to declarations.
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for _, frame := range frames {
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if frame.fn.CName() != "" {
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continue
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}
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if frame.fn.Blocks == nil {
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continue // external function
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}
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var err error
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if frame.fn.Synthetic == "package initializer" {
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continue // already done
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} else {
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err = c.parseFunc(frame)
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}
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if err != nil {
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return err
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}
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}
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// Create deferred function wrappers.
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for _, fn := range c.deferFuncs {
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// This function gets a single parameter which is a pointer to a struct.
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// This struct starts with the values of runtime._defer, but after that
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// follow the real parameters.
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// The job of this wrapper is to extract these parameters and to call
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// the real function with them.
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llvmFn := c.mod.NamedFunction(fn.LinkName() + "$defer")
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entry := c.ctx.AddBasicBlock(llvmFn, "entry")
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c.builder.SetInsertPointAtEnd(entry)
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deferRawPtr := llvmFn.Param(0)
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// Get the real param type and cast to it.
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valueTypes := []llvm.Type{llvmFn.Type(), llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)}
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for _, param := range fn.Params {
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llvmType, err := c.getLLVMType(param.Type())
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if err != nil {
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return err
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}
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valueTypes = append(valueTypes, llvmType)
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}
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contextType := llvm.StructType(valueTypes, false)
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contextPtr := c.builder.CreateBitCast(deferRawPtr, llvm.PointerType(contextType, 0), "context")
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// Extract the params from the struct.
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forwardParams := []llvm.Value{}
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zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
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for i := range fn.Params {
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gep := c.builder.CreateGEP(contextPtr, []llvm.Value{zero, llvm.ConstInt(llvm.Int32Type(), uint64(i+2), false)}, "gep")
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forwardParam := c.builder.CreateLoad(gep, "param")
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forwardParams = append(forwardParams, forwardParam)
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}
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// Call real function (of which this is a wrapper).
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c.createCall(fn.LLVMFn, forwardParams, "")
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c.builder.CreateRetVoid()
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}
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// After all packages are imported, add a synthetic initializer function
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// that calls the initializer of each package.
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initFn := c.mod.NamedFunction("runtime.initAll")
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initFn.SetLinkage(llvm.InternalLinkage)
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block := c.ctx.AddBasicBlock(initFn, "entry")
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c.builder.SetInsertPointAtEnd(block)
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for _, fn := range c.initFuncs {
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c.builder.CreateCall(fn, nil, "")
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}
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c.builder.CreateRetVoid()
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mainWrapper := c.mod.NamedFunction("runtime.mainWrapper")
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block = c.ctx.AddBasicBlock(mainWrapper, "entry")
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c.builder.SetInsertPointAtEnd(block)
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realMain := c.mod.NamedFunction(c.ir.MainPkg().Pkg.Path() + ".main")
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if c.ir.NeedsScheduler() {
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coroutine := c.builder.CreateCall(realMain, []llvm.Value{llvm.ConstPointerNull(c.i8ptrType)}, "")
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scheduler := c.mod.NamedFunction("runtime.scheduler")
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c.builder.CreateCall(scheduler, []llvm.Value{coroutine}, "")
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} else {
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c.builder.CreateCall(realMain, nil, "")
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}
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c.builder.CreateRetVoid()
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// Initialize runtime type information, for interfaces.
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// See src/runtime/interface.go for more details.
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dynamicTypes := c.ir.AllDynamicTypes()
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numDynamicTypes := 0
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for _, meta := range dynamicTypes {
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numDynamicTypes += len(meta.Methods)
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}
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ranges := make([]llvm.Value, 0, len(dynamicTypes))
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funcPointers := make([]llvm.Value, 0, numDynamicTypes)
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signatures := make([]llvm.Value, 0, numDynamicTypes)
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startIndex := 0
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rangeType := c.mod.GetTypeByName("runtime.methodSetRange")
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for _, meta := range dynamicTypes {
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rangeValues := []llvm.Value{
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llvm.ConstInt(llvm.Int16Type(), uint64(startIndex), false),
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llvm.ConstInt(llvm.Int16Type(), uint64(len(meta.Methods)), false),
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}
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rangeValue := llvm.ConstNamedStruct(rangeType, rangeValues)
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ranges = append(ranges, rangeValue)
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methods := make([]*types.Selection, 0, len(meta.Methods))
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for _, method := range meta.Methods {
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methods = append(methods, method)
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}
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c.ir.SortMethods(methods)
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for _, method := range methods {
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f := c.ir.GetFunction(c.ir.Program.MethodValue(method))
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if f.LLVMFn.IsNil() {
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return errors.New("cannot find function: " + f.LinkName())
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}
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fn := llvm.ConstBitCast(f.LLVMFn, c.i8ptrType)
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funcPointers = append(funcPointers, fn)
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signatureNum := c.ir.MethodNum(method.Obj().(*types.Func))
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signature := llvm.ConstInt(llvm.Int16Type(), uint64(signatureNum), false)
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signatures = append(signatures, signature)
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}
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startIndex += len(meta.Methods)
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}
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interfaceTypes := c.ir.AllInterfaces()
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interfaceIndex := make([]llvm.Value, len(interfaceTypes))
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interfaceLengths := make([]llvm.Value, len(interfaceTypes))
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interfaceMethods := make([]llvm.Value, 0)
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for i, itfType := range interfaceTypes {
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if itfType.Type.NumMethods() > 0xff {
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return errors.New("too many methods for interface " + itfType.Type.String())
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}
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interfaceIndex[i] = llvm.ConstInt(llvm.Int16Type(), uint64(i), false)
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interfaceLengths[i] = llvm.ConstInt(llvm.Int8Type(), uint64(itfType.Type.NumMethods()), false)
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funcs := make([]*types.Func, itfType.Type.NumMethods())
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for i := range funcs {
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funcs[i] = itfType.Type.Method(i)
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}
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c.ir.SortFuncs(funcs)
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for _, f := range funcs {
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id := llvm.ConstInt(llvm.Int16Type(), uint64(c.ir.MethodNum(f)), false)
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interfaceMethods = append(interfaceMethods, id)
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}
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}
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if len(ranges) >= 1<<16 {
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return errors.New("method call numbers do not fit in a 16-bit integer")
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}
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// Replace the pre-created arrays with the generated arrays.
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rangeArray := llvm.ConstArray(rangeType, ranges)
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rangeArrayNewGlobal := llvm.AddGlobal(c.mod, rangeArray.Type(), "runtime.methodSetRanges.tmp")
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rangeArrayNewGlobal.SetInitializer(rangeArray)
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rangeArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
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rangeArrayOldGlobal := c.mod.NamedGlobal("runtime.methodSetRanges")
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rangeArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(rangeArrayNewGlobal, rangeArrayOldGlobal.Type()))
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rangeArrayOldGlobal.EraseFromParentAsGlobal()
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rangeArrayNewGlobal.SetName("runtime.methodSetRanges")
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funcArray := llvm.ConstArray(c.i8ptrType, funcPointers)
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funcArrayNewGlobal := llvm.AddGlobal(c.mod, funcArray.Type(), "runtime.methodSetFunctions.tmp")
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funcArrayNewGlobal.SetInitializer(funcArray)
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funcArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
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funcArrayOldGlobal := c.mod.NamedGlobal("runtime.methodSetFunctions")
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funcArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(funcArrayNewGlobal, funcArrayOldGlobal.Type()))
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funcArrayOldGlobal.EraseFromParentAsGlobal()
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funcArrayNewGlobal.SetName("runtime.methodSetFunctions")
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signatureArray := llvm.ConstArray(llvm.Int16Type(), signatures)
|
|
signatureArrayNewGlobal := llvm.AddGlobal(c.mod, signatureArray.Type(), "runtime.methodSetSignatures.tmp")
|
|
signatureArrayNewGlobal.SetInitializer(signatureArray)
|
|
signatureArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
|
|
signatureArrayOldGlobal := c.mod.NamedGlobal("runtime.methodSetSignatures")
|
|
signatureArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(signatureArrayNewGlobal, signatureArrayOldGlobal.Type()))
|
|
signatureArrayOldGlobal.EraseFromParentAsGlobal()
|
|
signatureArrayNewGlobal.SetName("runtime.methodSetSignatures")
|
|
interfaceIndexArray := llvm.ConstArray(llvm.Int16Type(), interfaceIndex)
|
|
interfaceIndexArrayNewGlobal := llvm.AddGlobal(c.mod, interfaceIndexArray.Type(), "runtime.interfaceIndex.tmp")
|
|
interfaceIndexArrayNewGlobal.SetInitializer(interfaceIndexArray)
|
|
interfaceIndexArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
|
|
interfaceIndexArrayOldGlobal := c.mod.NamedGlobal("runtime.interfaceIndex")
|
|
interfaceIndexArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(interfaceIndexArrayNewGlobal, interfaceIndexArrayOldGlobal.Type()))
|
|
interfaceIndexArrayOldGlobal.EraseFromParentAsGlobal()
|
|
interfaceIndexArrayNewGlobal.SetName("runtime.interfaceIndex")
|
|
interfaceLengthsArray := llvm.ConstArray(llvm.Int8Type(), interfaceLengths)
|
|
interfaceLengthsArrayNewGlobal := llvm.AddGlobal(c.mod, interfaceLengthsArray.Type(), "runtime.interfaceLengths.tmp")
|
|
interfaceLengthsArrayNewGlobal.SetInitializer(interfaceLengthsArray)
|
|
interfaceLengthsArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
|
|
interfaceLengthsArrayOldGlobal := c.mod.NamedGlobal("runtime.interfaceLengths")
|
|
interfaceLengthsArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(interfaceLengthsArrayNewGlobal, interfaceLengthsArrayOldGlobal.Type()))
|
|
interfaceLengthsArrayOldGlobal.EraseFromParentAsGlobal()
|
|
interfaceLengthsArrayNewGlobal.SetName("runtime.interfaceLengths")
|
|
interfaceMethodsArray := llvm.ConstArray(llvm.Int16Type(), interfaceMethods)
|
|
interfaceMethodsArrayNewGlobal := llvm.AddGlobal(c.mod, interfaceMethodsArray.Type(), "runtime.interfaceMethods.tmp")
|
|
interfaceMethodsArrayNewGlobal.SetInitializer(interfaceMethodsArray)
|
|
interfaceMethodsArrayNewGlobal.SetLinkage(llvm.InternalLinkage)
|
|
interfaceMethodsArrayOldGlobal := c.mod.NamedGlobal("runtime.interfaceMethods")
|
|
interfaceMethodsArrayOldGlobal.ReplaceAllUsesWith(llvm.ConstBitCast(interfaceMethodsArrayNewGlobal, interfaceMethodsArrayOldGlobal.Type()))
|
|
interfaceMethodsArrayOldGlobal.EraseFromParentAsGlobal()
|
|
interfaceMethodsArrayNewGlobal.SetName("runtime.interfaceMethods")
|
|
|
|
c.mod.NamedGlobal("runtime.firstTypeWithMethods").SetInitializer(llvm.ConstInt(llvm.Int16Type(), uint64(c.ir.FirstDynamicType()), false))
|
|
|
|
// see: https://reviews.llvm.org/D18355
|
|
c.mod.AddNamedMetadataOperand("llvm.module.flags",
|
|
c.ctx.MDNode([]llvm.Metadata{
|
|
llvm.ConstInt(llvm.Int32Type(), 1, false).ConstantAsMetadata(), // Error on mismatch
|
|
llvm.GlobalContext().MDString("Debug Info Version"),
|
|
llvm.ConstInt(llvm.Int32Type(), 3, false).ConstantAsMetadata(), // DWARF version
|
|
}),
|
|
)
|
|
c.dibuilder.Finalize()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Compiler) getLLVMType(goType types.Type) (llvm.Type, error) {
|
|
switch typ := goType.(type) {
|
|
case *types.Array:
|
|
elemType, err := c.getLLVMType(typ.Elem())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
return llvm.ArrayType(elemType, int(typ.Len())), nil
|
|
case *types.Basic:
|
|
switch typ.Kind() {
|
|
case types.Bool, types.UntypedBool:
|
|
return llvm.Int1Type(), nil
|
|
case types.Int8, types.Uint8:
|
|
return llvm.Int8Type(), nil
|
|
case types.Int16, types.Uint16:
|
|
return llvm.Int16Type(), nil
|
|
case types.Int32, types.Uint32:
|
|
return llvm.Int32Type(), nil
|
|
case types.Int, types.Uint:
|
|
return c.intType, nil
|
|
case types.Int64, types.Uint64:
|
|
return llvm.Int64Type(), nil
|
|
case types.Float32:
|
|
return llvm.FloatType(), nil
|
|
case types.Float64:
|
|
return llvm.DoubleType(), nil
|
|
case types.Complex64:
|
|
return llvm.VectorType(llvm.FloatType(), 2), nil
|
|
case types.Complex128:
|
|
return llvm.VectorType(llvm.DoubleType(), 2), nil
|
|
case types.String, types.UntypedString:
|
|
return c.mod.GetTypeByName("runtime._string"), nil
|
|
case types.Uintptr:
|
|
return c.uintptrType, nil
|
|
case types.UnsafePointer:
|
|
return c.i8ptrType, nil
|
|
default:
|
|
return llvm.Type{}, errors.New("todo: unknown basic type: " + typ.String())
|
|
}
|
|
case *types.Chan:
|
|
return llvm.PointerType(c.mod.GetTypeByName("runtime.channel"), 0), nil
|
|
case *types.Interface:
|
|
return c.mod.GetTypeByName("runtime._interface"), nil
|
|
case *types.Map:
|
|
return llvm.PointerType(c.mod.GetTypeByName("runtime.hashmap"), 0), nil
|
|
case *types.Named:
|
|
if _, ok := typ.Underlying().(*types.Struct); ok {
|
|
llvmType := c.mod.GetTypeByName(typ.Obj().Pkg().Path() + "." + typ.Obj().Name())
|
|
if llvmType.IsNil() {
|
|
return llvm.Type{}, errors.New("type not found: " + typ.Obj().Pkg().Path() + "." + typ.Obj().Name())
|
|
}
|
|
return llvmType, nil
|
|
}
|
|
return c.getLLVMType(typ.Underlying())
|
|
case *types.Pointer:
|
|
ptrTo, err := c.getLLVMType(typ.Elem())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
return llvm.PointerType(ptrTo, 0), nil
|
|
case *types.Signature: // function pointer
|
|
// return value
|
|
var err error
|
|
var returnType llvm.Type
|
|
if typ.Results().Len() == 0 {
|
|
returnType = llvm.VoidType()
|
|
} else if typ.Results().Len() == 1 {
|
|
returnType, err = c.getLLVMType(typ.Results().At(0).Type())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
} else {
|
|
// Multiple return values. Put them together in a struct.
|
|
members := make([]llvm.Type, typ.Results().Len())
|
|
for i := 0; i < typ.Results().Len(); i++ {
|
|
returnType, err := c.getLLVMType(typ.Results().At(i).Type())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
members[i] = returnType
|
|
}
|
|
returnType = llvm.StructType(members, false)
|
|
}
|
|
// param values
|
|
var paramTypes []llvm.Type
|
|
if typ.Recv() != nil {
|
|
recv, err := c.getLLVMType(typ.Recv().Type())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
if recv.StructName() == "runtime._interface" {
|
|
recv = c.i8ptrType
|
|
}
|
|
paramTypes = append(paramTypes, c.expandFormalParamType(recv)...)
|
|
}
|
|
params := typ.Params()
|
|
for i := 0; i < params.Len(); i++ {
|
|
subType, err := c.getLLVMType(params.At(i).Type())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
paramTypes = append(paramTypes, c.expandFormalParamType(subType)...)
|
|
}
|
|
var ptr llvm.Type
|
|
if c.ir.SignatureNeedsContext(typ) {
|
|
// make a closure type (with a function pointer type inside):
|
|
// {context, funcptr}
|
|
paramTypes = append(paramTypes, c.i8ptrType)
|
|
ptr = llvm.PointerType(llvm.FunctionType(returnType, paramTypes, false), 0)
|
|
ptr = c.ctx.StructType([]llvm.Type{c.i8ptrType, ptr}, false)
|
|
} else {
|
|
// make a simple function pointer
|
|
ptr = llvm.PointerType(llvm.FunctionType(returnType, paramTypes, false), 0)
|
|
}
|
|
return ptr, nil
|
|
case *types.Slice:
|
|
elemType, err := c.getLLVMType(typ.Elem())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
members := []llvm.Type{
|
|
llvm.PointerType(elemType, 0),
|
|
c.lenType, // len
|
|
c.lenType, // cap
|
|
}
|
|
return llvm.StructType(members, false), nil
|
|
case *types.Struct:
|
|
members := make([]llvm.Type, typ.NumFields())
|
|
for i := 0; i < typ.NumFields(); i++ {
|
|
member, err := c.getLLVMType(typ.Field(i).Type())
|
|
if err != nil {
|
|
return llvm.Type{}, err
|
|
}
|
|
members[i] = member
|
|
}
|
|
return llvm.StructType(members, false), nil
|
|
default:
|
|
return llvm.Type{}, errors.New("todo: unknown type: " + goType.String())
|
|
}
|
|
}
|
|
|
|
// Return a zero LLVM value for any LLVM type. Setting this value as an
|
|
// initializer has the same effect as setting 'zeroinitializer' on a value.
|
|
// Sadly, I haven't found a way to do it directly with the Go API but this works
|
|
// just fine.
|
|
func getZeroValue(typ llvm.Type) (llvm.Value, error) {
|
|
switch typ.TypeKind() {
|
|
case llvm.ArrayTypeKind:
|
|
subTyp := typ.ElementType()
|
|
vals := make([]llvm.Value, typ.ArrayLength())
|
|
for i := range vals {
|
|
val, err := getZeroValue(subTyp)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
vals[i] = val
|
|
}
|
|
return llvm.ConstArray(subTyp, vals), nil
|
|
case llvm.FloatTypeKind, llvm.DoubleTypeKind:
|
|
return llvm.ConstFloat(typ, 0.0), nil
|
|
case llvm.IntegerTypeKind:
|
|
return llvm.ConstInt(typ, 0, false), nil
|
|
case llvm.PointerTypeKind:
|
|
return llvm.ConstPointerNull(typ), nil
|
|
case llvm.StructTypeKind:
|
|
types := typ.StructElementTypes()
|
|
vals := make([]llvm.Value, len(types))
|
|
for i, subTyp := range types {
|
|
val, err := getZeroValue(subTyp)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
vals[i] = val
|
|
}
|
|
if typ.StructName() != "" {
|
|
return llvm.ConstNamedStruct(typ, vals), nil
|
|
} else {
|
|
return llvm.ConstStruct(vals, false), nil
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: LLVM zero initializer")
|
|
}
|
|
}
|
|
|
|
// Is this a pointer type of some sort? Can be unsafe.Pointer or any *T pointer.
|
|
func isPointer(typ types.Type) bool {
|
|
if _, ok := typ.(*types.Pointer); ok {
|
|
return true
|
|
} else if typ, ok := typ.(*types.Basic); ok && typ.Kind() == types.UnsafePointer {
|
|
return true
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
// Get the DWARF type for this Go type.
|
|
func (c *Compiler) getDIType(typ types.Type) (llvm.Metadata, error) {
|
|
name := typ.String()
|
|
if dityp, ok := c.ditypes[name]; ok {
|
|
return dityp, nil
|
|
} else {
|
|
llvmType, err := c.getLLVMType(typ)
|
|
if err != nil {
|
|
return llvm.Metadata{}, err
|
|
}
|
|
sizeInBytes := c.targetData.TypeAllocSize(llvmType)
|
|
var encoding llvm.DwarfTypeEncoding
|
|
switch typ := typ.(type) {
|
|
case *types.Basic:
|
|
if typ.Info()&types.IsBoolean != 0 {
|
|
encoding = llvm.DW_ATE_boolean
|
|
} else if typ.Info()&types.IsFloat != 0 {
|
|
encoding = llvm.DW_ATE_float
|
|
} else if typ.Info()&types.IsComplex != 0 {
|
|
encoding = llvm.DW_ATE_complex_float
|
|
} else if typ.Info()&types.IsUnsigned != 0 {
|
|
encoding = llvm.DW_ATE_unsigned
|
|
} else if typ.Info()&types.IsInteger != 0 {
|
|
encoding = llvm.DW_ATE_signed
|
|
} else if typ.Kind() == types.UnsafePointer {
|
|
encoding = llvm.DW_ATE_address
|
|
}
|
|
case *types.Pointer:
|
|
encoding = llvm.DW_ATE_address
|
|
}
|
|
// TODO: other types
|
|
dityp = c.dibuilder.CreateBasicType(llvm.DIBasicType{
|
|
Name: name,
|
|
SizeInBits: sizeInBytes * 8,
|
|
Encoding: encoding,
|
|
})
|
|
c.ditypes[name] = dityp
|
|
return dityp, nil
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
|
|
frame := &Frame{
|
|
fn: f,
|
|
locals: make(map[ssa.Value]llvm.Value),
|
|
blocks: make(map[*ssa.BasicBlock]llvm.BasicBlock),
|
|
blocking: c.ir.IsBlocking(f),
|
|
}
|
|
|
|
var retType llvm.Type
|
|
if frame.blocking {
|
|
if f.Signature.Results() != nil {
|
|
return nil, errors.New("todo: return values in blocking function")
|
|
}
|
|
retType = c.i8ptrType
|
|
} else if f.Signature.Results() == nil {
|
|
retType = llvm.VoidType()
|
|
} else if f.Signature.Results().Len() == 1 {
|
|
var err error
|
|
retType, err = c.getLLVMType(f.Signature.Results().At(0).Type())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
} else {
|
|
results := make([]llvm.Type, 0, f.Signature.Results().Len())
|
|
for i := 0; i < f.Signature.Results().Len(); i++ {
|
|
typ, err := c.getLLVMType(f.Signature.Results().At(i).Type())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
results = append(results, typ)
|
|
}
|
|
retType = llvm.StructType(results, false)
|
|
}
|
|
|
|
var paramTypes []llvm.Type
|
|
if frame.blocking {
|
|
paramTypes = append(paramTypes, c.i8ptrType) // parent coroutine
|
|
}
|
|
for _, param := range f.Params {
|
|
paramType, err := c.getLLVMType(param.Type())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
paramTypeFragments := c.expandFormalParamType(paramType)
|
|
paramTypes = append(paramTypes, paramTypeFragments...)
|
|
}
|
|
|
|
if c.ir.FunctionNeedsContext(f) {
|
|
// This function gets an extra parameter: the context pointer (for
|
|
// closures and bound methods). Add it as an extra paramter here.
|
|
paramTypes = append(paramTypes, c.i8ptrType)
|
|
}
|
|
|
|
fnType := llvm.FunctionType(retType, paramTypes, false)
|
|
|
|
name := f.LinkName()
|
|
frame.fn.LLVMFn = c.mod.NamedFunction(name)
|
|
if frame.fn.LLVMFn.IsNil() {
|
|
frame.fn.LLVMFn = llvm.AddFunction(c.mod, name, fnType)
|
|
}
|
|
|
|
if c.Debug && f.Syntax() != nil && len(f.Blocks) != 0 {
|
|
// Create debug info file if needed.
|
|
pos := c.ir.Program.Fset.Position(f.Syntax().Pos())
|
|
if _, ok := c.difiles[pos.Filename]; !ok {
|
|
dir, file := filepath.Split(pos.Filename)
|
|
c.difiles[pos.Filename] = c.dibuilder.CreateFile(file, dir[:len(dir)-1])
|
|
}
|
|
|
|
// Debug info for this function.
|
|
diparams := make([]llvm.Metadata, 0, len(f.Params))
|
|
for _, param := range f.Params {
|
|
ditype, err := c.getDIType(param.Type())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
diparams = append(diparams, ditype)
|
|
}
|
|
diFuncType := c.dibuilder.CreateSubroutineType(llvm.DISubroutineType{
|
|
File: c.difiles[pos.Filename],
|
|
Parameters: diparams,
|
|
Flags: 0, // ?
|
|
})
|
|
frame.difunc = c.dibuilder.CreateFunction(c.difiles[pos.Filename], llvm.DIFunction{
|
|
Name: f.RelString(nil),
|
|
LinkageName: f.LinkName(),
|
|
File: c.difiles[pos.Filename],
|
|
Line: pos.Line,
|
|
Type: diFuncType,
|
|
LocalToUnit: true,
|
|
IsDefinition: true,
|
|
ScopeLine: 0,
|
|
Flags: llvm.FlagPrototyped,
|
|
Optimized: true,
|
|
})
|
|
frame.fn.LLVMFn.SetSubprogram(frame.difunc)
|
|
}
|
|
|
|
return frame, nil
|
|
}
|
|
|
|
// Create a new global hashmap bucket, for map initialization.
|
|
func (c *Compiler) initMapNewBucket(prefix string, mapType *types.Map) (llvm.Value, uint64, uint64, error) {
|
|
llvmKeyType, err := c.getLLVMType(mapType.Key().Underlying())
|
|
if err != nil {
|
|
return llvm.Value{}, 0, 0, err
|
|
}
|
|
llvmValueType, err := c.getLLVMType(mapType.Elem().Underlying())
|
|
if err != nil {
|
|
return llvm.Value{}, 0, 0, err
|
|
}
|
|
keySize := c.targetData.TypeAllocSize(llvmKeyType)
|
|
valueSize := c.targetData.TypeAllocSize(llvmValueType)
|
|
bucketType := llvm.StructType([]llvm.Type{
|
|
llvm.ArrayType(llvm.Int8Type(), 8), // tophash
|
|
c.i8ptrType, // next bucket
|
|
llvm.ArrayType(llvmKeyType, 8), // key type
|
|
llvm.ArrayType(llvmValueType, 8), // value type
|
|
}, false)
|
|
bucketValue, err := getZeroValue(bucketType)
|
|
if err != nil {
|
|
return llvm.Value{}, 0, 0, err
|
|
}
|
|
bucket := llvm.AddGlobal(c.mod, bucketType, prefix+"$hashmap$bucket")
|
|
bucket.SetInitializer(bucketValue)
|
|
bucket.SetLinkage(llvm.InternalLinkage)
|
|
return bucket, keySize, valueSize, nil
|
|
}
|
|
|
|
func (c *Compiler) parseGlobalInitializer(g *ir.Global) error {
|
|
if g.IsExtern() {
|
|
return nil
|
|
}
|
|
llvmValue, err := c.getInterpretedValue(g.LinkName(), g.Initializer())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
g.LLVMGlobal.SetInitializer(llvmValue)
|
|
return nil
|
|
}
|
|
|
|
// Turn a computed Value type (ConstValue, ArrayValue, etc.) into a LLVM value.
|
|
// This is used to set the initializer of globals after they have been
|
|
// calculated by the package initializer interpreter.
|
|
func (c *Compiler) getInterpretedValue(prefix string, value ir.Value) (llvm.Value, error) {
|
|
switch value := value.(type) {
|
|
case *ir.ArrayValue:
|
|
vals := make([]llvm.Value, len(value.Elems))
|
|
for i, elem := range value.Elems {
|
|
val, err := c.getInterpretedValue(prefix+"$arrayval", elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
vals[i] = val
|
|
}
|
|
subTyp, err := c.getLLVMType(value.ElemType)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstArray(subTyp, vals), nil
|
|
|
|
case *ir.ConstValue:
|
|
return c.parseConst(prefix, value.Expr)
|
|
|
|
case *ir.FunctionValue:
|
|
if value.Elem == nil {
|
|
llvmType, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return getZeroValue(llvmType)
|
|
}
|
|
fn := c.ir.GetFunction(value.Elem)
|
|
ptr := fn.LLVMFn
|
|
if c.ir.SignatureNeedsContext(fn.Signature) {
|
|
// Create closure value: {context, function pointer}
|
|
ptr = llvm.ConstStruct([]llvm.Value{llvm.ConstPointerNull(c.i8ptrType), ptr}, false)
|
|
}
|
|
return ptr, nil
|
|
|
|
case *ir.GlobalValue:
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
ptr := llvm.ConstInBoundsGEP(value.Global.LLVMGlobal, []llvm.Value{zero})
|
|
return ptr, nil
|
|
|
|
case *ir.InterfaceValue:
|
|
underlying := llvm.ConstPointerNull(c.i8ptrType) // could be any 0 value
|
|
if value.Elem != nil {
|
|
elem, err := c.getInterpretedValue(prefix, value.Elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
underlying = elem
|
|
}
|
|
return c.parseMakeInterface(underlying, value.Type, prefix)
|
|
|
|
case *ir.MapValue:
|
|
// Create initial bucket.
|
|
firstBucketGlobal, keySize, valueSize, err := c.initMapNewBucket(prefix, value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
// Insert each key/value pair in the hashmap.
|
|
bucketGlobal := firstBucketGlobal
|
|
for i, key := range value.Keys {
|
|
llvmKey, err := c.getInterpretedValue(prefix, key)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
llvmValue, err := c.getInterpretedValue(prefix, value.Values[i])
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
|
|
constVal := key.(*ir.ConstValue).Expr
|
|
var keyBuf []byte
|
|
switch constVal.Type().Underlying().(*types.Basic).Kind() {
|
|
case types.String:
|
|
keyBuf = []byte(constant.StringVal(constVal.Value))
|
|
case types.Int:
|
|
keyBuf = make([]byte, c.targetData.TypeAllocSize(c.intType))
|
|
n, _ := constant.Uint64Val(constVal.Value)
|
|
for i := range keyBuf {
|
|
keyBuf[i] = byte(n)
|
|
n >>= 8
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: init: map key not implemented: " + constVal.Type().Underlying().String())
|
|
}
|
|
hash := hashmapHash(keyBuf)
|
|
|
|
if i%8 == 0 && i != 0 {
|
|
// Bucket is full, create a new one.
|
|
newBucketGlobal, _, _, err := c.initMapNewBucket(prefix, value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
newBucketPtr := llvm.ConstInBoundsGEP(newBucketGlobal, []llvm.Value{zero})
|
|
newBucketPtrCast := llvm.ConstBitCast(newBucketPtr, c.i8ptrType)
|
|
// insert pointer into old bucket
|
|
bucket := bucketGlobal.Initializer()
|
|
bucket = llvm.ConstInsertValue(bucket, newBucketPtrCast, []uint32{1})
|
|
bucketGlobal.SetInitializer(bucket)
|
|
// switch to next bucket
|
|
bucketGlobal = newBucketGlobal
|
|
}
|
|
|
|
tophashValue := llvm.ConstInt(llvm.Int8Type(), uint64(hashmapTopHash(hash)), false)
|
|
bucket := bucketGlobal.Initializer()
|
|
bucket = llvm.ConstInsertValue(bucket, tophashValue, []uint32{0, uint32(i % 8)})
|
|
bucket = llvm.ConstInsertValue(bucket, llvmKey, []uint32{2, uint32(i % 8)})
|
|
bucket = llvm.ConstInsertValue(bucket, llvmValue, []uint32{3, uint32(i % 8)})
|
|
bucketGlobal.SetInitializer(bucket)
|
|
}
|
|
|
|
// Create the hashmap itself.
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
bucketPtr := llvm.ConstInBoundsGEP(bucketGlobal, []llvm.Value{zero})
|
|
hashmapType := c.mod.GetTypeByName("runtime.hashmap")
|
|
hashmap := llvm.ConstNamedStruct(hashmapType, []llvm.Value{
|
|
llvm.ConstPointerNull(llvm.PointerType(hashmapType, 0)), // next
|
|
llvm.ConstBitCast(bucketPtr, c.i8ptrType), // buckets
|
|
llvm.ConstInt(c.lenType, uint64(len(value.Keys)), false), // count
|
|
llvm.ConstInt(llvm.Int8Type(), keySize, false), // keySize
|
|
llvm.ConstInt(llvm.Int8Type(), valueSize, false), // valueSize
|
|
llvm.ConstInt(llvm.Int8Type(), 0, false), // bucketBits
|
|
})
|
|
|
|
// Create a pointer to this hashmap.
|
|
hashmapPtr := llvm.AddGlobal(c.mod, hashmap.Type(), prefix+"$hashmap")
|
|
hashmapPtr.SetInitializer(hashmap)
|
|
hashmapPtr.SetLinkage(llvm.InternalLinkage)
|
|
return llvm.ConstInBoundsGEP(hashmapPtr, []llvm.Value{zero}), nil
|
|
|
|
case *ir.PointerBitCastValue:
|
|
elem, err := c.getInterpretedValue(prefix, value.Elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
llvmType, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstBitCast(elem, llvmType), nil
|
|
|
|
case *ir.PointerToUintptrValue:
|
|
elem, err := c.getInterpretedValue(prefix, value.Elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstPtrToInt(elem, c.uintptrType), nil
|
|
|
|
case *ir.PointerValue:
|
|
if value.Elem == nil {
|
|
typ, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstPointerNull(typ), nil
|
|
}
|
|
elem, err := c.getInterpretedValue(prefix, *value.Elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
obj := llvm.AddGlobal(c.mod, elem.Type(), prefix+"$ptrvalue")
|
|
obj.SetInitializer(elem)
|
|
obj.SetLinkage(llvm.InternalLinkage)
|
|
elem = obj
|
|
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
ptr := llvm.ConstInBoundsGEP(elem, []llvm.Value{zero})
|
|
return ptr, nil
|
|
|
|
case *ir.SliceValue:
|
|
var globalPtr llvm.Value
|
|
var arrayLength uint64
|
|
if value.Array == nil {
|
|
arrayType, err := c.getLLVMType(value.Type.Elem())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
globalPtr = llvm.ConstPointerNull(llvm.PointerType(arrayType, 0))
|
|
} else {
|
|
// make array
|
|
array, err := c.getInterpretedValue(prefix, value.Array)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
// make global from array
|
|
global := llvm.AddGlobal(c.mod, array.Type(), prefix+"$array")
|
|
global.SetInitializer(array)
|
|
global.SetLinkage(llvm.InternalLinkage)
|
|
|
|
// get pointer to global
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
globalPtr = c.builder.CreateInBoundsGEP(global, []llvm.Value{zero, zero}, "")
|
|
|
|
arrayLength = uint64(len(value.Array.Elems))
|
|
}
|
|
|
|
// make slice
|
|
sliceTyp, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
llvmLen := llvm.ConstInt(c.lenType, arrayLength, false)
|
|
slice := llvm.ConstNamedStruct(sliceTyp, []llvm.Value{
|
|
globalPtr, // ptr
|
|
llvmLen, // len
|
|
llvmLen, // cap
|
|
})
|
|
return slice, nil
|
|
|
|
case *ir.StructValue:
|
|
fields := make([]llvm.Value, len(value.Fields))
|
|
for i, elem := range value.Fields {
|
|
field, err := c.getInterpretedValue(prefix, elem)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
fields[i] = field
|
|
}
|
|
switch value.Type.(type) {
|
|
case *types.Named:
|
|
llvmType, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstNamedStruct(llvmType, fields), nil
|
|
case *types.Struct:
|
|
return llvm.ConstStruct(fields, false), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("init: unknown struct type: " + value.Type.String())
|
|
}
|
|
|
|
case *ir.ZeroBasicValue:
|
|
llvmType, err := c.getLLVMType(value.Type)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return getZeroValue(llvmType)
|
|
|
|
default:
|
|
return llvm.Value{}, errors.New("init: unknown initializer type: " + fmt.Sprintf("%#v", value))
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseFunc(frame *Frame) error {
|
|
if c.DumpSSA {
|
|
fmt.Printf("\nfunc %s:\n", frame.fn.Function)
|
|
}
|
|
if !frame.fn.IsExported() {
|
|
frame.fn.LLVMFn.SetLinkage(llvm.InternalLinkage)
|
|
}
|
|
if frame.fn.IsInterrupt() && strings.HasPrefix(c.Triple, "avr") {
|
|
frame.fn.LLVMFn.SetFunctionCallConv(85) // CallingConv::AVR_SIGNAL
|
|
}
|
|
|
|
if c.Debug {
|
|
pos := c.ir.Program.Fset.Position(frame.fn.Pos())
|
|
c.builder.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), frame.difunc, llvm.Metadata{})
|
|
}
|
|
|
|
// Pre-create all basic blocks in the function.
|
|
for _, block := range frame.fn.DomPreorder() {
|
|
llvmBlock := c.ctx.AddBasicBlock(frame.fn.LLVMFn, block.Comment)
|
|
frame.blocks[block] = llvmBlock
|
|
}
|
|
if frame.blocking {
|
|
frame.cleanupBlock = c.ctx.AddBasicBlock(frame.fn.LLVMFn, "task.cleanup")
|
|
frame.suspendBlock = c.ctx.AddBasicBlock(frame.fn.LLVMFn, "task.suspend")
|
|
}
|
|
entryBlock := frame.blocks[frame.fn.Blocks[0]]
|
|
c.builder.SetInsertPointAtEnd(entryBlock)
|
|
|
|
// Load function parameters
|
|
llvmParamIndex := 0
|
|
for i, param := range frame.fn.Params {
|
|
llvmType, err := c.getLLVMType(param.Type())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fields := make([]llvm.Value, 0, 1)
|
|
for range c.expandFormalParamType(llvmType) {
|
|
fields = append(fields, frame.fn.LLVMFn.Param(llvmParamIndex))
|
|
llvmParamIndex++
|
|
}
|
|
frame.locals[param] = c.collapseFormalParam(llvmType, fields)
|
|
|
|
// Add debug information to this parameter (if available)
|
|
if c.Debug && frame.fn.Syntax() != nil {
|
|
pos := c.ir.Program.Fset.Position(frame.fn.Syntax().Pos())
|
|
dityp, err := c.getDIType(param.Type())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.dibuilder.CreateParameterVariable(frame.difunc, llvm.DIParameterVariable{
|
|
Name: param.Name(),
|
|
File: c.difiles[pos.Filename],
|
|
Line: pos.Line,
|
|
Type: dityp,
|
|
AlwaysPreserve: true,
|
|
ArgNo: i + 1,
|
|
})
|
|
// TODO: set the value of this parameter.
|
|
}
|
|
}
|
|
|
|
// Load free variables from the context. This is a closure (or bound
|
|
// method).
|
|
if len(frame.fn.FreeVars) != 0 {
|
|
if !c.ir.FunctionNeedsContext(frame.fn) {
|
|
panic("free variables on function without context")
|
|
}
|
|
context := frame.fn.LLVMFn.LastParam()
|
|
|
|
// Determine the context type. It's a struct containing all variables.
|
|
freeVarTypes := make([]llvm.Type, 0, len(frame.fn.FreeVars))
|
|
for _, freeVar := range frame.fn.FreeVars {
|
|
typ, err := c.getLLVMType(freeVar.Type())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
freeVarTypes = append(freeVarTypes, typ)
|
|
}
|
|
contextType := llvm.StructType(freeVarTypes, false)
|
|
|
|
// Get a correctly-typed pointer to the context.
|
|
contextAlloc := llvm.Value{}
|
|
if c.targetData.TypeAllocSize(contextType) <= c.targetData.TypeAllocSize(c.i8ptrType) {
|
|
// Context stored directly in pointer. Load it using an alloca.
|
|
contextRawAlloc := c.builder.CreateAlloca(llvm.PointerType(c.i8ptrType, 0), "")
|
|
contextRawValue := c.builder.CreateBitCast(context, llvm.PointerType(c.i8ptrType, 0), "")
|
|
c.builder.CreateStore(contextRawValue, contextRawAlloc)
|
|
contextAlloc = c.builder.CreateBitCast(contextRawAlloc, llvm.PointerType(contextType, 0), "")
|
|
} else {
|
|
// Context stored in the heap. Bitcast the passed-in pointer to the
|
|
// correct pointer type.
|
|
contextAlloc = c.builder.CreateBitCast(context, llvm.PointerType(contextType, 0), "")
|
|
}
|
|
|
|
// Load each free variable from the context.
|
|
// A free variable is always a pointer when this is a closure, but it
|
|
// can be another type when it is a wrapper for a bound method (these
|
|
// wrappers are generated by the ssa package).
|
|
for i, freeVar := range frame.fn.FreeVars {
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
llvm.ConstInt(llvm.Int32Type(), uint64(i), false),
|
|
}
|
|
gep := c.builder.CreateInBoundsGEP(contextAlloc, indices, "")
|
|
frame.locals[freeVar] = c.builder.CreateLoad(gep, "")
|
|
}
|
|
}
|
|
|
|
if frame.fn.Recover != nil {
|
|
// Create defer list pointer.
|
|
deferType := llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)
|
|
frame.deferPtr = c.builder.CreateAlloca(deferType, "deferPtr")
|
|
c.builder.CreateStore(llvm.ConstPointerNull(deferType), frame.deferPtr)
|
|
}
|
|
|
|
if frame.blocking {
|
|
// Coroutine initialization.
|
|
taskState := c.builder.CreateAlloca(c.mod.GetTypeByName("runtime.taskState"), "task.state")
|
|
stateI8 := c.builder.CreateBitCast(taskState, c.i8ptrType, "task.state.i8")
|
|
id := c.builder.CreateCall(c.coroIdFunc, []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
stateI8,
|
|
llvm.ConstNull(c.i8ptrType),
|
|
llvm.ConstNull(c.i8ptrType),
|
|
}, "task.token")
|
|
size := c.builder.CreateCall(c.coroSizeFunc, nil, "task.size")
|
|
if c.targetData.TypeAllocSize(size.Type()) > c.targetData.TypeAllocSize(c.uintptrType) {
|
|
size = c.builder.CreateTrunc(size, c.uintptrType, "task.size.uintptr")
|
|
} else if c.targetData.TypeAllocSize(size.Type()) < c.targetData.TypeAllocSize(c.uintptrType) {
|
|
size = c.builder.CreateZExt(size, c.uintptrType, "task.size.uintptr")
|
|
}
|
|
data := c.createRuntimeCall("alloc", []llvm.Value{size}, "task.data")
|
|
frame.taskHandle = c.builder.CreateCall(c.coroBeginFunc, []llvm.Value{id, data}, "task.handle")
|
|
|
|
// Coroutine cleanup. Free resources associated with this coroutine.
|
|
c.builder.SetInsertPointAtEnd(frame.cleanupBlock)
|
|
mem := c.builder.CreateCall(c.coroFreeFunc, []llvm.Value{id, frame.taskHandle}, "task.data.free")
|
|
c.createRuntimeCall("free", []llvm.Value{mem}, "")
|
|
// re-insert parent coroutine
|
|
c.createRuntimeCall("yieldToScheduler", []llvm.Value{frame.fn.LLVMFn.FirstParam()}, "")
|
|
c.builder.CreateBr(frame.suspendBlock)
|
|
|
|
// Coroutine suspend. A call to llvm.coro.suspend() will branch here.
|
|
c.builder.SetInsertPointAtEnd(frame.suspendBlock)
|
|
c.builder.CreateCall(c.coroEndFunc, []llvm.Value{frame.taskHandle, llvm.ConstInt(llvm.Int1Type(), 0, false)}, "unused")
|
|
c.builder.CreateRet(frame.taskHandle)
|
|
}
|
|
|
|
// Fill blocks with instructions.
|
|
for _, block := range frame.fn.DomPreorder() {
|
|
if c.DumpSSA {
|
|
fmt.Printf("%s:\n", block.Comment)
|
|
}
|
|
c.builder.SetInsertPointAtEnd(frame.blocks[block])
|
|
frame.currentBlock = block
|
|
for _, instr := range block.Instrs {
|
|
if _, ok := instr.(*ssa.DebugRef); ok {
|
|
continue
|
|
}
|
|
if c.DumpSSA {
|
|
if val, ok := instr.(ssa.Value); ok && val.Name() != "" {
|
|
fmt.Printf("\t%s = %s\n", val.Name(), val.String())
|
|
} else {
|
|
fmt.Printf("\t%s\n", instr.String())
|
|
}
|
|
}
|
|
err := c.parseInstr(frame, instr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if frame.fn.Name() == "init" && len(block.Instrs) == 0 {
|
|
c.builder.CreateRetVoid()
|
|
}
|
|
}
|
|
|
|
// Resolve phi nodes
|
|
for _, phi := range frame.phis {
|
|
block := phi.ssa.Block()
|
|
for i, edge := range phi.ssa.Edges {
|
|
llvmVal, err := c.parseExpr(frame, edge)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
llvmBlock := frame.blocks[block.Preds[i]]
|
|
phi.llvm.AddIncoming([]llvm.Value{llvmVal}, []llvm.BasicBlock{llvmBlock})
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Compiler) parseInstr(frame *Frame, instr ssa.Instruction) error {
|
|
if c.Debug {
|
|
pos := c.ir.Program.Fset.Position(instr.Pos())
|
|
c.builder.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), frame.difunc, llvm.Metadata{})
|
|
}
|
|
|
|
switch instr := instr.(type) {
|
|
case ssa.Value:
|
|
value, err := c.parseExpr(frame, instr)
|
|
if err == ir.ErrCGoWrapper {
|
|
// Ignore CGo global variables which we don't use.
|
|
return nil
|
|
}
|
|
frame.locals[instr] = value
|
|
return err
|
|
case *ssa.DebugRef:
|
|
return nil // ignore
|
|
case *ssa.Defer:
|
|
if _, ok := instr.Call.Value.(*ssa.Function); !ok || instr.Call.IsInvoke() {
|
|
return errors.New("todo: non-direct function calls in defer")
|
|
}
|
|
fn := c.ir.GetFunction(instr.Call.Value.(*ssa.Function))
|
|
|
|
// The pointer to the previous defer struct, which we will replace to
|
|
// make a linked list.
|
|
next := c.builder.CreateLoad(frame.deferPtr, "defer.next")
|
|
|
|
// Try to find the wrapper $defer function.
|
|
deferName := fn.LinkName() + "$defer"
|
|
callback := c.mod.NamedFunction(deferName)
|
|
if callback.IsNil() {
|
|
// Not found, have to add it.
|
|
deferFuncType := llvm.FunctionType(llvm.VoidType(), []llvm.Type{next.Type()}, false)
|
|
callback = llvm.AddFunction(c.mod, deferName, deferFuncType)
|
|
c.deferFuncs = append(c.deferFuncs, fn)
|
|
}
|
|
|
|
// Collect all values to be put in the struct (starting with
|
|
// runtime._defer fields).
|
|
values := []llvm.Value{callback, next}
|
|
valueTypes := []llvm.Type{callback.Type(), next.Type()}
|
|
for _, param := range instr.Call.Args {
|
|
llvmParam, err := c.parseExpr(frame, param)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
values = append(values, llvmParam)
|
|
valueTypes = append(valueTypes, llvmParam.Type())
|
|
}
|
|
|
|
// Make a struct out of it.
|
|
contextType := llvm.StructType(valueTypes, false)
|
|
context, err := getZeroValue(contextType)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for i, value := range values {
|
|
context = c.builder.CreateInsertValue(context, value, i, "")
|
|
}
|
|
|
|
// Put this struct in an alloca.
|
|
alloca := c.builder.CreateAlloca(contextType, "defer.alloca")
|
|
c.builder.CreateStore(context, alloca)
|
|
|
|
// Push it on top of the linked list by replacing deferPtr.
|
|
allocaCast := c.builder.CreateBitCast(alloca, next.Type(), "defer.alloca.cast")
|
|
c.builder.CreateStore(allocaCast, frame.deferPtr)
|
|
return nil
|
|
|
|
case *ssa.Go:
|
|
if instr.Common().Method != nil {
|
|
return errors.New("todo: go on method receiver")
|
|
}
|
|
|
|
// Execute non-blocking calls (including builtins) directly.
|
|
// parentHandle param is ignored.
|
|
if !c.ir.IsBlocking(c.ir.GetFunction(instr.Common().Value.(*ssa.Function))) {
|
|
_, err := c.parseCall(frame, instr.Common(), llvm.Value{})
|
|
return err // probably nil
|
|
}
|
|
|
|
// Start this goroutine.
|
|
// parentHandle is nil, as the goroutine has no parent frame (it's a new
|
|
// stack).
|
|
handle, err := c.parseCall(frame, instr.Common(), llvm.Value{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.createRuntimeCall("yieldToScheduler", []llvm.Value{handle}, "")
|
|
return nil
|
|
case *ssa.If:
|
|
cond, err := c.parseExpr(frame, instr.Cond)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
block := instr.Block()
|
|
blockThen := frame.blocks[block.Succs[0]]
|
|
blockElse := frame.blocks[block.Succs[1]]
|
|
c.builder.CreateCondBr(cond, blockThen, blockElse)
|
|
return nil
|
|
case *ssa.Jump:
|
|
blockJump := frame.blocks[instr.Block().Succs[0]]
|
|
c.builder.CreateBr(blockJump)
|
|
return nil
|
|
case *ssa.MapUpdate:
|
|
m, err := c.parseExpr(frame, instr.Map)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
key, err := c.parseExpr(frame, instr.Key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
value, err := c.parseExpr(frame, instr.Value)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
mapType := instr.Map.Type().Underlying().(*types.Map)
|
|
switch keyType := mapType.Key().Underlying().(type) {
|
|
case *types.Basic:
|
|
valueAlloca := c.builder.CreateAlloca(value.Type(), "hashmap.value")
|
|
c.builder.CreateStore(value, valueAlloca)
|
|
valuePtr := c.builder.CreateBitCast(valueAlloca, c.i8ptrType, "hashmap.valueptr")
|
|
if keyType.Info()&types.IsString != 0 {
|
|
params := []llvm.Value{m, key, valuePtr}
|
|
c.createRuntimeCall("hashmapStringSet", params, "")
|
|
return nil
|
|
} else if keyType.Info()&(types.IsBoolean|types.IsInteger) != 0 {
|
|
keyAlloca := c.builder.CreateAlloca(key.Type(), "hashmap.key")
|
|
c.builder.CreateStore(key, keyAlloca)
|
|
keyPtr := c.builder.CreateBitCast(keyAlloca, c.i8ptrType, "hashmap.keyptr")
|
|
params := []llvm.Value{m, keyPtr, valuePtr}
|
|
c.createRuntimeCall("hashmapBinarySet", params, "")
|
|
return nil
|
|
} else {
|
|
return errors.New("todo: map update key type: " + keyType.String())
|
|
}
|
|
default:
|
|
return errors.New("todo: map update key type: " + keyType.String())
|
|
}
|
|
case *ssa.Panic:
|
|
value, err := c.parseExpr(frame, instr.X)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.createRuntimeCall("_panic", []llvm.Value{value}, "")
|
|
c.builder.CreateUnreachable()
|
|
return nil
|
|
case *ssa.Return:
|
|
if frame.blocking {
|
|
if len(instr.Results) != 0 {
|
|
return errors.New("todo: return values from blocking function")
|
|
}
|
|
// Final suspend.
|
|
continuePoint := c.builder.CreateCall(c.coroSuspendFunc, []llvm.Value{
|
|
llvm.ConstNull(c.ctx.TokenType()),
|
|
llvm.ConstInt(llvm.Int1Type(), 1, false), // final=true
|
|
}, "")
|
|
sw := c.builder.CreateSwitch(continuePoint, frame.suspendBlock, 2)
|
|
sw.AddCase(llvm.ConstInt(llvm.Int8Type(), 1, false), frame.cleanupBlock)
|
|
return nil
|
|
} else {
|
|
if len(instr.Results) == 0 {
|
|
c.builder.CreateRetVoid()
|
|
return nil
|
|
} else if len(instr.Results) == 1 {
|
|
val, err := c.parseExpr(frame, instr.Results[0])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c.builder.CreateRet(val)
|
|
return nil
|
|
} else {
|
|
// Multiple return values. Put them all in a struct.
|
|
retVal, err := getZeroValue(frame.fn.LLVMFn.Type().ElementType().ReturnType())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for i, result := range instr.Results {
|
|
val, err := c.parseExpr(frame, result)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
retVal = c.builder.CreateInsertValue(retVal, val, i, "")
|
|
}
|
|
c.builder.CreateRet(retVal)
|
|
return nil
|
|
}
|
|
}
|
|
case *ssa.RunDefers:
|
|
deferData := c.builder.CreateLoad(frame.deferPtr, "")
|
|
c.createRuntimeCall("rundefers", []llvm.Value{deferData}, "")
|
|
return nil
|
|
case *ssa.Store:
|
|
llvmAddr, err := c.parseExpr(frame, instr.Addr)
|
|
if err == ir.ErrCGoWrapper {
|
|
// Ignore CGo global variables which we don't use.
|
|
return nil
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
llvmVal, err := c.parseExpr(frame, instr.Val)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
store := c.builder.CreateStore(llvmVal, llvmAddr)
|
|
valType := instr.Addr.Type().(*types.Pointer).Elem()
|
|
if c.ir.IsVolatile(valType) {
|
|
// Volatile store, for memory-mapped registers.
|
|
store.SetVolatile(true)
|
|
}
|
|
return nil
|
|
default:
|
|
return errors.New("unknown instruction: " + instr.String())
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseBuiltin(frame *Frame, args []ssa.Value, callName string) (llvm.Value, error) {
|
|
switch callName {
|
|
case "cap":
|
|
value, err := c.parseExpr(frame, args[0])
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
switch args[0].Type().(type) {
|
|
case *types.Slice:
|
|
return c.builder.CreateExtractValue(value, 2, "cap"), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: cap: unknown type")
|
|
}
|
|
case "copy":
|
|
dst, err := c.parseExpr(frame, args[0])
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
src, err := c.parseExpr(frame, args[1])
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
dstLen := c.builder.CreateExtractValue(dst, 1, "copy.dstLen")
|
|
srcLen := c.builder.CreateExtractValue(src, 1, "copy.srcLen")
|
|
dstBuf := c.builder.CreateExtractValue(dst, 0, "copy.dstArray")
|
|
srcBuf := c.builder.CreateExtractValue(src, 0, "copy.srcArray")
|
|
elemType := dstBuf.Type().ElementType()
|
|
dstBuf = c.builder.CreateBitCast(dstBuf, c.i8ptrType, "copy.dstPtr")
|
|
srcBuf = c.builder.CreateBitCast(srcBuf, c.i8ptrType, "copy.srcPtr")
|
|
elemSize := llvm.ConstInt(c.uintptrType, c.targetData.TypeAllocSize(elemType), false)
|
|
return c.createRuntimeCall("sliceCopy", []llvm.Value{dstBuf, srcBuf, dstLen, srcLen, elemSize}, "copy.n"), nil
|
|
case "len":
|
|
value, err := c.parseExpr(frame, args[0])
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
var llvmLen llvm.Value
|
|
switch args[0].Type().(type) {
|
|
case *types.Basic, *types.Slice:
|
|
// string or slice
|
|
llvmLen = c.builder.CreateExtractValue(value, 1, "len")
|
|
case *types.Map:
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
llvm.ConstInt(llvm.Int32Type(), 2, false), // hashmap.count
|
|
}
|
|
ptr := c.builder.CreateGEP(value, indices, "lenptr")
|
|
llvmLen = c.builder.CreateLoad(ptr, "len")
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: len: unknown type")
|
|
}
|
|
if c.targetData.TypeAllocSize(llvmLen.Type()) < c.targetData.TypeAllocSize(c.intType) {
|
|
llvmLen = c.builder.CreateZExt(llvmLen, c.intType, "len.int")
|
|
}
|
|
return llvmLen, nil
|
|
case "print", "println":
|
|
for i, arg := range args {
|
|
if i >= 1 && callName == "println" {
|
|
c.createRuntimeCall("printspace", nil, "")
|
|
}
|
|
value, err := c.parseExpr(frame, arg)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
typ := arg.Type().Underlying()
|
|
switch typ := typ.(type) {
|
|
case *types.Basic:
|
|
switch typ.Kind() {
|
|
case types.String:
|
|
c.createRuntimeCall("printstring", []llvm.Value{value}, "")
|
|
case types.Uintptr:
|
|
c.createRuntimeCall("printptr", []llvm.Value{value}, "")
|
|
case types.UnsafePointer:
|
|
ptrValue := c.builder.CreatePtrToInt(value, c.uintptrType, "")
|
|
c.createRuntimeCall("printptr", []llvm.Value{ptrValue}, "")
|
|
default:
|
|
// runtime.print{int,uint}{8,16,32,64}
|
|
if typ.Info()&types.IsInteger != 0 {
|
|
name := "print"
|
|
if typ.Info()&types.IsUnsigned != 0 {
|
|
name += "uint"
|
|
} else {
|
|
name += "int"
|
|
}
|
|
name += strconv.FormatUint(c.targetData.TypeAllocSize(value.Type())*8, 10)
|
|
c.createRuntimeCall(name, []llvm.Value{value}, "")
|
|
} else if typ.Kind() == types.Bool {
|
|
c.createRuntimeCall("printbool", []llvm.Value{value}, "")
|
|
} else if typ.Kind() == types.Float32 {
|
|
c.createRuntimeCall("printfloat32", []llvm.Value{value}, "")
|
|
} else if typ.Kind() == types.Float64 {
|
|
c.createRuntimeCall("printfloat64", []llvm.Value{value}, "")
|
|
} else {
|
|
return llvm.Value{}, errors.New("unknown basic arg type: " + typ.String())
|
|
}
|
|
}
|
|
case *types.Interface:
|
|
c.createRuntimeCall("printitf", []llvm.Value{value}, "")
|
|
case *types.Map:
|
|
c.createRuntimeCall("printmap", []llvm.Value{value}, "")
|
|
case *types.Pointer:
|
|
ptrValue := c.builder.CreatePtrToInt(value, c.uintptrType, "")
|
|
c.createRuntimeCall("printptr", []llvm.Value{ptrValue}, "")
|
|
default:
|
|
return llvm.Value{}, errors.New("unknown arg type: " + typ.String())
|
|
}
|
|
}
|
|
if callName == "println" {
|
|
c.createRuntimeCall("printnl", nil, "")
|
|
}
|
|
return llvm.Value{}, nil // print() or println() returns void
|
|
case "ssa:wrapnilchk":
|
|
// TODO: do an actual nil check?
|
|
return c.parseExpr(frame, args[0])
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: builtin: " + callName)
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseFunctionCall(frame *Frame, args []ssa.Value, llvmFn, context llvm.Value, blocking bool, parentHandle llvm.Value) (llvm.Value, error) {
|
|
var params []llvm.Value
|
|
if blocking {
|
|
if parentHandle.IsNil() {
|
|
// Started from 'go' statement.
|
|
params = append(params, llvm.ConstNull(c.i8ptrType))
|
|
} else {
|
|
// Blocking function calls another blocking function.
|
|
params = append(params, parentHandle)
|
|
}
|
|
}
|
|
for _, param := range args {
|
|
val, err := c.parseExpr(frame, param)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
params = append(params, val)
|
|
}
|
|
|
|
if !context.IsNil() {
|
|
// This function takes a context parameter.
|
|
// Add it to the end of the parameter list.
|
|
params = append(params, context)
|
|
}
|
|
|
|
if frame.blocking && llvmFn.Name() == "time.Sleep" {
|
|
// Set task state to TASK_STATE_SLEEP and set the duration.
|
|
c.createRuntimeCall("sleepTask", []llvm.Value{frame.taskHandle, params[0]}, "")
|
|
|
|
// Yield to scheduler.
|
|
continuePoint := c.builder.CreateCall(c.coroSuspendFunc, []llvm.Value{
|
|
llvm.ConstNull(c.ctx.TokenType()),
|
|
llvm.ConstInt(llvm.Int1Type(), 0, false),
|
|
}, "")
|
|
wakeup := c.ctx.InsertBasicBlock(llvm.NextBasicBlock(c.builder.GetInsertBlock()), "task.wakeup")
|
|
sw := c.builder.CreateSwitch(continuePoint, frame.suspendBlock, 2)
|
|
sw.AddCase(llvm.ConstInt(llvm.Int8Type(), 0, false), wakeup)
|
|
sw.AddCase(llvm.ConstInt(llvm.Int8Type(), 1, false), frame.cleanupBlock)
|
|
c.builder.SetInsertPointAtEnd(wakeup)
|
|
|
|
return llvm.Value{}, nil
|
|
}
|
|
|
|
result := c.createCall(llvmFn, params, "")
|
|
if blocking && !parentHandle.IsNil() {
|
|
// Calling a blocking function as a regular function call.
|
|
// This is done by passing the current coroutine as a parameter to the
|
|
// new coroutine and dropping the current coroutine from the scheduler
|
|
// (with the TASK_STATE_CALL state). When the subroutine is finished, it
|
|
// will reactivate the parent (this frame) in it's destroy function.
|
|
|
|
c.createRuntimeCall("yieldToScheduler", []llvm.Value{result}, "")
|
|
|
|
// Set task state to TASK_STATE_CALL.
|
|
c.createRuntimeCall("waitForAsyncCall", []llvm.Value{frame.taskHandle}, "")
|
|
|
|
// Yield to the scheduler.
|
|
continuePoint := c.builder.CreateCall(c.coroSuspendFunc, []llvm.Value{
|
|
llvm.ConstNull(c.ctx.TokenType()),
|
|
llvm.ConstInt(llvm.Int1Type(), 0, false),
|
|
}, "")
|
|
resume := c.ctx.InsertBasicBlock(llvm.NextBasicBlock(c.builder.GetInsertBlock()), "task.callComplete")
|
|
sw := c.builder.CreateSwitch(continuePoint, frame.suspendBlock, 2)
|
|
sw.AddCase(llvm.ConstInt(llvm.Int8Type(), 0, false), resume)
|
|
sw.AddCase(llvm.ConstInt(llvm.Int8Type(), 1, false), frame.cleanupBlock)
|
|
c.builder.SetInsertPointAtEnd(resume)
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (c *Compiler) parseCall(frame *Frame, instr *ssa.CallCommon, parentHandle llvm.Value) (llvm.Value, error) {
|
|
if instr.IsInvoke() {
|
|
// Call an interface method with dynamic dispatch.
|
|
itf, err := c.parseExpr(frame, instr.Value) // interface
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
llvmFnType, err := c.getLLVMType(instr.Method.Type())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
if c.ir.SignatureNeedsContext(instr.Method.Type().(*types.Signature)) {
|
|
// This is somewhat of a hack.
|
|
// getLLVMType() has created a closure type for us, but we don't
|
|
// actually want a closure type as an interface call can never be a
|
|
// closure call. So extract the function pointer type from the
|
|
// closure.
|
|
// This happens because somewhere the same function signature is
|
|
// used in a closure or bound method.
|
|
llvmFnType = llvmFnType.Subtypes()[1]
|
|
}
|
|
|
|
values := []llvm.Value{
|
|
itf,
|
|
llvm.ConstInt(llvm.Int16Type(), uint64(c.ir.MethodNum(instr.Method)), false),
|
|
}
|
|
fn := c.createRuntimeCall("interfaceMethod", values, "invoke.func")
|
|
fnCast := c.builder.CreateBitCast(fn, llvmFnType, "invoke.func.cast")
|
|
receiverValue := c.builder.CreateExtractValue(itf, 1, "invoke.func.receiver")
|
|
|
|
args := []llvm.Value{receiverValue}
|
|
for _, arg := range instr.Args {
|
|
val, err := c.parseExpr(frame, arg)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
args = append(args, val)
|
|
}
|
|
if c.ir.SignatureNeedsContext(instr.Method.Type().(*types.Signature)) {
|
|
// This function takes an extra context parameter. An interface call
|
|
// cannot also be a closure but we have to supply the nil pointer
|
|
// anyway.
|
|
args = append(args, llvm.ConstPointerNull(c.i8ptrType))
|
|
}
|
|
|
|
// TODO: blocking methods (needs analysis)
|
|
return c.createCall(fnCast, args, ""), nil
|
|
}
|
|
|
|
// Try to call the function directly for trivially static calls.
|
|
if fn := instr.StaticCallee(); fn != nil {
|
|
if fn.Name() == "Asm" && len(instr.Args) == 1 {
|
|
// Magic function: insert inline assembly instead of calling it.
|
|
if named, ok := instr.Args[0].Type().(*types.Named); ok && named.Obj().Name() == "__asm" {
|
|
fnType := llvm.FunctionType(llvm.VoidType(), []llvm.Type{}, false)
|
|
asm := constant.StringVal(instr.Args[0].(*ssa.Const).Value)
|
|
target := llvm.InlineAsm(fnType, asm, "", true, false, 0)
|
|
return c.builder.CreateCall(target, nil, ""), nil
|
|
}
|
|
}
|
|
targetFunc := c.ir.GetFunction(fn)
|
|
if targetFunc.LLVMFn.IsNil() {
|
|
return llvm.Value{}, errors.New("undefined function: " + targetFunc.LinkName())
|
|
}
|
|
var context llvm.Value
|
|
if c.ir.FunctionNeedsContext(targetFunc) {
|
|
// This function call is to a (potential) closure, not a regular
|
|
// function. See whether it is a closure and if so, call it as such.
|
|
// Else, supply a dummy nil pointer as the last parameter.
|
|
var err error
|
|
if mkClosure, ok := instr.Value.(*ssa.MakeClosure); ok {
|
|
// closure is {context, function pointer}
|
|
closure, err := c.parseExpr(frame, mkClosure)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
context = c.builder.CreateExtractValue(closure, 0, "")
|
|
} else {
|
|
context, err = getZeroValue(c.i8ptrType)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
}
|
|
}
|
|
return c.parseFunctionCall(frame, instr.Args, targetFunc.LLVMFn, context, c.ir.IsBlocking(targetFunc), parentHandle)
|
|
}
|
|
|
|
// Builtin or function pointer.
|
|
switch call := instr.Value.(type) {
|
|
case *ssa.Builtin:
|
|
return c.parseBuiltin(frame, instr.Args, call.Name())
|
|
default: // function pointer
|
|
value, err := c.parseExpr(frame, instr.Value)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
// TODO: blocking function pointers (needs analysis)
|
|
var context llvm.Value
|
|
if c.ir.SignatureNeedsContext(instr.Signature()) {
|
|
// 'value' is a closure, not a raw function pointer.
|
|
// Extract the function pointer and the context pointer.
|
|
// closure: {context, function pointer}
|
|
context = c.builder.CreateExtractValue(value, 0, "")
|
|
value = c.builder.CreateExtractValue(value, 1, "")
|
|
}
|
|
return c.parseFunctionCall(frame, instr.Args, value, context, false, parentHandle)
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) emitBoundsCheck(frame *Frame, arrayLen, index llvm.Value) {
|
|
if frame.fn.IsNoBounds() {
|
|
// The //go:nobounds pragma was added to the function to avoid bounds
|
|
// checking.
|
|
return
|
|
}
|
|
// Optimize away trivial cases.
|
|
// LLVM would do this anyway with interprocedural optimizations, but it
|
|
// helps to see cases where bounds checking would really help.
|
|
if index.IsConstant() && arrayLen.IsConstant() {
|
|
index := index.SExtValue()
|
|
arrayLen := arrayLen.SExtValue()
|
|
if index >= 0 && index < arrayLen {
|
|
return
|
|
}
|
|
}
|
|
c.createRuntimeCall("lookupBoundsCheck", []llvm.Value{arrayLen, index}, "")
|
|
}
|
|
|
|
func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
|
|
if value, ok := frame.locals[expr]; ok {
|
|
// Value is a local variable that has already been computed.
|
|
if value.IsNil() {
|
|
return llvm.Value{}, errors.New("undefined local var (from cgo?)")
|
|
}
|
|
return value, nil
|
|
}
|
|
|
|
switch expr := expr.(type) {
|
|
case *ssa.Alloc:
|
|
typ, err := c.getLLVMType(expr.Type().Underlying().(*types.Pointer).Elem())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
var buf llvm.Value
|
|
if expr.Heap {
|
|
// TODO: escape analysis
|
|
size := llvm.ConstInt(c.uintptrType, c.targetData.TypeAllocSize(typ), false)
|
|
buf = c.createRuntimeCall("alloc", []llvm.Value{size}, expr.Comment)
|
|
buf = c.builder.CreateBitCast(buf, llvm.PointerType(typ, 0), "")
|
|
} else {
|
|
buf = c.builder.CreateAlloca(typ, expr.Comment)
|
|
zero, err := getZeroValue(typ)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
c.builder.CreateStore(zero, buf) // zero-initialize var
|
|
}
|
|
return buf, nil
|
|
case *ssa.BinOp:
|
|
return c.parseBinOp(frame, expr)
|
|
case *ssa.Call:
|
|
// Passing the current task here to the subroutine. It is only used when
|
|
// the subroutine is blocking.
|
|
return c.parseCall(frame, expr.Common(), frame.taskHandle)
|
|
case *ssa.ChangeInterface:
|
|
// Do not change between interface types: always use the underlying
|
|
// (concrete) type in the type number of the interface. Every method
|
|
// call on an interface will do a lookup which method to call.
|
|
// This is different from how the official Go compiler works, because of
|
|
// heap allocation and because it's easier to implement, see:
|
|
// https://research.swtch.com/interfaces
|
|
return c.parseExpr(frame, expr.X)
|
|
case *ssa.ChangeType:
|
|
x, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
// The only case when we need to bitcast is when casting between named
|
|
// struct types, as those are actually different in LLVM. Let's just
|
|
// bitcast all struct types for ease of use.
|
|
if _, ok := expr.Type().Underlying().(*types.Struct); ok {
|
|
llvmType, err := c.getLLVMType(expr.X.Type())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return c.builder.CreateBitCast(x, llvmType, "changetype"), nil
|
|
}
|
|
return x, nil
|
|
case *ssa.Const:
|
|
return c.parseConst(frame.fn.LinkName(), expr)
|
|
case *ssa.Convert:
|
|
x, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return c.parseConvert(expr.X.Type(), expr.Type(), x)
|
|
case *ssa.Extract:
|
|
value, err := c.parseExpr(frame, expr.Tuple)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
result := c.builder.CreateExtractValue(value, expr.Index, "")
|
|
return result, nil
|
|
case *ssa.Field:
|
|
value, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
result := c.builder.CreateExtractValue(value, expr.Field, "")
|
|
return result, nil
|
|
case *ssa.FieldAddr:
|
|
val, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
llvm.ConstInt(llvm.Int32Type(), uint64(expr.Field), false),
|
|
}
|
|
return c.builder.CreateGEP(val, indices, ""), nil
|
|
case *ssa.Function:
|
|
fn := c.ir.GetFunction(expr)
|
|
ptr := fn.LLVMFn
|
|
if c.ir.FunctionNeedsContext(fn) {
|
|
// Create closure for function pointer.
|
|
// Closure is: {context, function pointer}
|
|
ptr = llvm.ConstStruct([]llvm.Value{
|
|
llvm.ConstPointerNull(c.i8ptrType),
|
|
ptr,
|
|
}, false)
|
|
}
|
|
return ptr, nil
|
|
case *ssa.Global:
|
|
if strings.HasPrefix(expr.Name(), "__cgofn__cgo_") || strings.HasPrefix(expr.Name(), "_cgo_") {
|
|
// Ignore CGo global variables which we don't use.
|
|
return llvm.Value{}, ir.ErrCGoWrapper
|
|
}
|
|
value := c.ir.GetGlobal(expr).LLVMGlobal
|
|
if value.IsNil() {
|
|
return llvm.Value{}, errors.New("global not found: " + c.ir.GetGlobal(expr).LinkName())
|
|
}
|
|
return value, nil
|
|
case *ssa.Index:
|
|
array, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
index, err := c.parseExpr(frame, expr.Index)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
// Check bounds.
|
|
arrayLen := expr.X.Type().(*types.Array).Len()
|
|
arrayLenLLVM := llvm.ConstInt(c.lenType, uint64(arrayLen), false)
|
|
c.emitBoundsCheck(frame, arrayLenLLVM, index)
|
|
|
|
// Can't load directly from array (as index is non-constant), so have to
|
|
// do it using an alloca+gep+load.
|
|
alloca := c.builder.CreateAlloca(array.Type(), "")
|
|
c.builder.CreateStore(array, alloca)
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
ptr := c.builder.CreateGEP(alloca, []llvm.Value{zero, index}, "")
|
|
return c.builder.CreateLoad(ptr, ""), nil
|
|
case *ssa.IndexAddr:
|
|
val, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
index, err := c.parseExpr(frame, expr.Index)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
// Get buffer pointer and length
|
|
var bufptr, buflen llvm.Value
|
|
switch ptrTyp := expr.X.Type().Underlying().(type) {
|
|
case *types.Pointer:
|
|
typ := expr.X.Type().(*types.Pointer).Elem().Underlying()
|
|
switch typ := typ.(type) {
|
|
case *types.Array:
|
|
bufptr = val
|
|
buflen = llvm.ConstInt(c.lenType, uint64(typ.Len()), false)
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: indexaddr: " + typ.String())
|
|
}
|
|
case *types.Slice:
|
|
bufptr = c.builder.CreateExtractValue(val, 0, "indexaddr.ptr")
|
|
buflen = c.builder.CreateExtractValue(val, 1, "indexaddr.len")
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: indexaddr: " + ptrTyp.String())
|
|
}
|
|
|
|
// Bounds check.
|
|
// LLVM optimizes this away in most cases.
|
|
c.emitBoundsCheck(frame, buflen, index)
|
|
|
|
switch expr.X.Type().(type) {
|
|
case *types.Pointer:
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
index,
|
|
}
|
|
return c.builder.CreateGEP(bufptr, indices, ""), nil
|
|
case *types.Slice:
|
|
return c.builder.CreateGEP(bufptr, []llvm.Value{index}, ""), nil
|
|
default:
|
|
panic("unreachable")
|
|
}
|
|
case *ssa.Lookup:
|
|
if expr.CommaOk {
|
|
return llvm.Value{}, errors.New("todo: lookup with comma-ok")
|
|
}
|
|
value, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
index, err := c.parseExpr(frame, expr.Index)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
switch xType := expr.X.Type().(type) {
|
|
case *types.Basic:
|
|
// Value type must be a string, which is a basic type.
|
|
if xType.Kind() != types.String {
|
|
panic("lookup on non-string?")
|
|
}
|
|
|
|
// Bounds check.
|
|
// LLVM optimizes this away in most cases.
|
|
length, err := c.parseBuiltin(frame, []ssa.Value{expr.X}, "len")
|
|
if err != nil {
|
|
return llvm.Value{}, err // shouldn't happen
|
|
}
|
|
c.emitBoundsCheck(frame, length, index)
|
|
|
|
// Lookup byte
|
|
buf := c.builder.CreateExtractValue(value, 0, "")
|
|
bufPtr := c.builder.CreateGEP(buf, []llvm.Value{index}, "")
|
|
return c.builder.CreateLoad(bufPtr, ""), nil
|
|
case *types.Map:
|
|
switch keyType := xType.Key().Underlying().(type) {
|
|
case *types.Basic:
|
|
llvmValueType, err := c.getLLVMType(expr.Type())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
mapValueAlloca := c.builder.CreateAlloca(llvmValueType, "hashmap.value")
|
|
mapValuePtr := c.builder.CreateBitCast(mapValueAlloca, c.i8ptrType, "hashmap.valueptr")
|
|
if keyType.Info()&types.IsString != 0 {
|
|
params := []llvm.Value{value, index, mapValuePtr}
|
|
c.createRuntimeCall("hashmapStringGet", params, "")
|
|
return c.builder.CreateLoad(mapValueAlloca, ""), nil
|
|
} else if keyType.Info()&(types.IsBoolean|types.IsInteger) != 0 {
|
|
keyAlloca := c.builder.CreateAlloca(index.Type(), "hashmap.key")
|
|
c.builder.CreateStore(index, keyAlloca)
|
|
keyPtr := c.builder.CreateBitCast(keyAlloca, c.i8ptrType, "hashmap.keyptr")
|
|
params := []llvm.Value{value, keyPtr, mapValuePtr}
|
|
c.createRuntimeCall("hashmapBinaryGet", params, "")
|
|
return c.builder.CreateLoad(mapValueAlloca, ""), nil
|
|
} else {
|
|
return llvm.Value{}, errors.New("todo: map lookup key type: " + keyType.String())
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: map lookup key type: " + keyType.String())
|
|
}
|
|
default:
|
|
panic("unknown lookup type: " + expr.String())
|
|
}
|
|
|
|
case *ssa.MakeClosure:
|
|
return c.parseMakeClosure(frame, expr)
|
|
|
|
case *ssa.MakeInterface:
|
|
val, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return c.parseMakeInterface(val, expr.X.Type(), "")
|
|
case *ssa.MakeMap:
|
|
mapType := expr.Type().Underlying().(*types.Map)
|
|
llvmKeyType, err := c.getLLVMType(mapType.Key().Underlying())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
llvmValueType, err := c.getLLVMType(mapType.Elem().Underlying())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
keySize := c.targetData.TypeAllocSize(llvmKeyType)
|
|
valueSize := c.targetData.TypeAllocSize(llvmValueType)
|
|
llvmKeySize := llvm.ConstInt(llvm.Int8Type(), keySize, false)
|
|
llvmValueSize := llvm.ConstInt(llvm.Int8Type(), valueSize, false)
|
|
hashmap := c.createRuntimeCall("hashmapMake", []llvm.Value{llvmKeySize, llvmValueSize}, "")
|
|
return hashmap, nil
|
|
case *ssa.MakeSlice:
|
|
sliceLen, err := c.parseExpr(frame, expr.Len)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
sliceCap, err := c.parseExpr(frame, expr.Cap)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
sliceType := expr.Type().Underlying().(*types.Slice)
|
|
llvmElemType, err := c.getLLVMType(sliceType.Elem())
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
elemSize := c.targetData.TypeAllocSize(llvmElemType)
|
|
|
|
// Bounds checking.
|
|
if !frame.fn.IsNoBounds() {
|
|
c.createRuntimeCall("sliceBoundsCheckMake", []llvm.Value{sliceLen, sliceCap}, "")
|
|
}
|
|
|
|
// Allocate the backing array.
|
|
// TODO: escape analysis
|
|
elemSizeValue := llvm.ConstInt(c.uintptrType, elemSize, false)
|
|
sliceCapCast, err := c.parseConvert(expr.Cap.Type(), types.Typ[types.Uintptr], sliceCap)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
sliceSize := c.builder.CreateBinOp(llvm.Mul, elemSizeValue, sliceCapCast, "makeslice.cap")
|
|
slicePtr := c.createRuntimeCall("alloc", []llvm.Value{sliceSize}, "makeslice.buf")
|
|
slicePtr = c.builder.CreateBitCast(slicePtr, llvm.PointerType(llvmElemType, 0), "makeslice.array")
|
|
|
|
if c.targetData.TypeAllocSize(sliceLen.Type()) > c.targetData.TypeAllocSize(c.lenType) {
|
|
sliceLen = c.builder.CreateTrunc(sliceLen, c.lenType, "")
|
|
sliceCap = c.builder.CreateTrunc(sliceCap, c.lenType, "")
|
|
}
|
|
|
|
// Create the slice.
|
|
slice := llvm.ConstStruct([]llvm.Value{
|
|
llvm.Undef(slicePtr.Type()),
|
|
llvm.Undef(c.lenType),
|
|
llvm.Undef(c.lenType),
|
|
}, false)
|
|
slice = c.builder.CreateInsertValue(slice, slicePtr, 0, "")
|
|
slice = c.builder.CreateInsertValue(slice, sliceLen, 1, "")
|
|
slice = c.builder.CreateInsertValue(slice, sliceCap, 2, "")
|
|
return slice, nil
|
|
case *ssa.Next:
|
|
rangeVal := expr.Iter.(*ssa.Range).X
|
|
llvmRangeVal, err := c.parseExpr(frame, rangeVal)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
it, err := c.parseExpr(frame, expr.Iter)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
if expr.IsString {
|
|
return c.createRuntimeCall("stringNext", []llvm.Value{llvmRangeVal, it}, "range.next"), nil
|
|
} else { // map
|
|
llvmKeyType, err := c.getLLVMType(rangeVal.Type().(*types.Map).Key())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
llvmValueType, err := c.getLLVMType(rangeVal.Type().(*types.Map).Elem())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
mapKeyAlloca := c.builder.CreateAlloca(llvmKeyType, "range.key")
|
|
mapKeyPtr := c.builder.CreateBitCast(mapKeyAlloca, c.i8ptrType, "range.keyptr")
|
|
mapValueAlloca := c.builder.CreateAlloca(llvmValueType, "range.value")
|
|
mapValuePtr := c.builder.CreateBitCast(mapValueAlloca, c.i8ptrType, "range.valueptr")
|
|
ok := c.createRuntimeCall("hashmapNext", []llvm.Value{llvmRangeVal, it, mapKeyPtr, mapValuePtr}, "range.next")
|
|
|
|
tuple := llvm.Undef(llvm.StructType([]llvm.Type{llvm.Int1Type(), llvmKeyType, llvmValueType}, false))
|
|
tuple = c.builder.CreateInsertValue(tuple, ok, 0, "")
|
|
tuple = c.builder.CreateInsertValue(tuple, c.builder.CreateLoad(mapKeyAlloca, ""), 1, "")
|
|
tuple = c.builder.CreateInsertValue(tuple, c.builder.CreateLoad(mapValueAlloca, ""), 2, "")
|
|
return tuple, nil
|
|
}
|
|
case *ssa.Phi:
|
|
t, err := c.getLLVMType(expr.Type())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
phi := c.builder.CreatePHI(t, "")
|
|
frame.phis = append(frame.phis, Phi{expr, phi})
|
|
return phi, nil
|
|
case *ssa.Range:
|
|
var iteratorType llvm.Type
|
|
switch typ := expr.X.Type().Underlying().(type) {
|
|
case *types.Basic: // string
|
|
iteratorType = c.mod.GetTypeByName("runtime.stringIterator")
|
|
case *types.Map:
|
|
iteratorType = c.mod.GetTypeByName("runtime.hashmapIterator")
|
|
default:
|
|
panic("unknown type in range: " + typ.String())
|
|
}
|
|
it := c.builder.CreateAlloca(iteratorType, "range.it")
|
|
zero, err := getZeroValue(iteratorType)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
c.builder.CreateStore(zero, it)
|
|
return it, nil
|
|
case *ssa.Slice:
|
|
if expr.Max != nil {
|
|
return llvm.Value{}, errors.New("todo: full slice expressions (with max): " + expr.Type().String())
|
|
}
|
|
value, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
var low, high llvm.Value
|
|
if expr.Low == nil {
|
|
low = llvm.ConstInt(c.intType, 0, false)
|
|
} else {
|
|
low, err = c.parseExpr(frame, expr.Low)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
}
|
|
if expr.High != nil {
|
|
high, err = c.parseExpr(frame, expr.High)
|
|
if err != nil {
|
|
return llvm.Value{}, nil
|
|
}
|
|
}
|
|
switch typ := expr.X.Type().Underlying().(type) {
|
|
case *types.Pointer: // pointer to array
|
|
// slice an array
|
|
length := typ.Elem().(*types.Array).Len()
|
|
llvmLen := llvm.ConstInt(c.lenType, uint64(length), false)
|
|
llvmLenInt := llvm.ConstInt(c.intType, uint64(length), false)
|
|
if high.IsNil() {
|
|
high = llvmLenInt
|
|
}
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
low,
|
|
}
|
|
slicePtr := c.builder.CreateGEP(value, indices, "slice.ptr")
|
|
sliceLen := c.builder.CreateSub(high, low, "slice.len")
|
|
sliceCap := c.builder.CreateSub(llvmLenInt, low, "slice.cap")
|
|
|
|
// This check is optimized away in most cases.
|
|
if !frame.fn.IsNoBounds() {
|
|
c.createRuntimeCall("sliceBoundsCheck", []llvm.Value{llvmLen, low, high}, "")
|
|
}
|
|
|
|
if c.targetData.TypeAllocSize(sliceLen.Type()) > c.targetData.TypeAllocSize(c.lenType) {
|
|
sliceLen = c.builder.CreateTrunc(sliceLen, c.lenType, "")
|
|
sliceCap = c.builder.CreateTrunc(sliceCap, c.lenType, "")
|
|
}
|
|
|
|
slice := llvm.ConstStruct([]llvm.Value{
|
|
llvm.Undef(slicePtr.Type()),
|
|
llvm.Undef(c.lenType),
|
|
llvm.Undef(c.lenType),
|
|
}, false)
|
|
slice = c.builder.CreateInsertValue(slice, slicePtr, 0, "")
|
|
slice = c.builder.CreateInsertValue(slice, sliceLen, 1, "")
|
|
slice = c.builder.CreateInsertValue(slice, sliceCap, 2, "")
|
|
return slice, nil
|
|
|
|
case *types.Slice:
|
|
// slice a slice
|
|
oldPtr := c.builder.CreateExtractValue(value, 0, "")
|
|
oldLen := c.builder.CreateExtractValue(value, 1, "")
|
|
oldCap := c.builder.CreateExtractValue(value, 2, "")
|
|
if high.IsNil() {
|
|
high = oldLen
|
|
}
|
|
|
|
if !frame.fn.IsNoBounds() {
|
|
c.createRuntimeCall("sliceBoundsCheck", []llvm.Value{oldLen, low, high}, "")
|
|
}
|
|
|
|
if c.targetData.TypeAllocSize(low.Type()) > c.targetData.TypeAllocSize(c.lenType) {
|
|
low = c.builder.CreateTrunc(low, c.lenType, "")
|
|
}
|
|
if c.targetData.TypeAllocSize(high.Type()) > c.targetData.TypeAllocSize(c.lenType) {
|
|
high = c.builder.CreateTrunc(high, c.lenType, "")
|
|
}
|
|
|
|
newPtr := c.builder.CreateGEP(oldPtr, []llvm.Value{low}, "")
|
|
newLen := c.builder.CreateSub(high, low, "")
|
|
newCap := c.builder.CreateSub(oldCap, low, "")
|
|
slice := llvm.ConstStruct([]llvm.Value{
|
|
llvm.Undef(newPtr.Type()),
|
|
llvm.Undef(c.lenType),
|
|
llvm.Undef(c.lenType),
|
|
}, false)
|
|
slice = c.builder.CreateInsertValue(slice, newPtr, 0, "")
|
|
slice = c.builder.CreateInsertValue(slice, newLen, 1, "")
|
|
slice = c.builder.CreateInsertValue(slice, newCap, 2, "")
|
|
return slice, nil
|
|
|
|
case *types.Basic:
|
|
if typ.Kind() != types.String {
|
|
return llvm.Value{}, errors.New("unknown slice type: " + typ.String())
|
|
}
|
|
// slice a string
|
|
oldPtr := c.builder.CreateExtractValue(value, 0, "")
|
|
oldLen := c.builder.CreateExtractValue(value, 1, "")
|
|
if high.IsNil() {
|
|
high = oldLen
|
|
}
|
|
|
|
if !frame.fn.IsNoBounds() {
|
|
c.createRuntimeCall("sliceBoundsCheck", []llvm.Value{oldLen, low, high}, "")
|
|
}
|
|
|
|
newPtr := c.builder.CreateGEP(oldPtr, []llvm.Value{low}, "")
|
|
newLen := c.builder.CreateSub(high, low, "")
|
|
str, err := getZeroValue(c.mod.GetTypeByName("runtime._string"))
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
str = c.builder.CreateInsertValue(str, newPtr, 0, "")
|
|
str = c.builder.CreateInsertValue(str, newLen, 1, "")
|
|
return str, nil
|
|
|
|
default:
|
|
return llvm.Value{}, errors.New("unknown slice type: " + typ.String())
|
|
}
|
|
case *ssa.TypeAssert:
|
|
itf, err := c.parseExpr(frame, expr.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
assertedType, err := c.getLLVMType(expr.AssertedType)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
valueNil, err := getZeroValue(assertedType)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
actualTypeNum := c.builder.CreateExtractValue(itf, 0, "interface.type")
|
|
commaOk := llvm.Value{}
|
|
if itf, ok := expr.AssertedType.Underlying().(*types.Interface); ok {
|
|
// Type assert on interface type.
|
|
// This is slightly non-trivial: at runtime the list of methods
|
|
// needs to be checked to see whether it implements the interface.
|
|
// At the same time, the interface value itself is unchanged.
|
|
itfTypeNum := c.ir.InterfaceNum(itf)
|
|
itfTypeNumValue := llvm.ConstInt(llvm.Int16Type(), uint64(itfTypeNum), false)
|
|
commaOk = c.createRuntimeCall("interfaceImplements", []llvm.Value{actualTypeNum, itfTypeNumValue}, "")
|
|
|
|
} else {
|
|
// Type assert on concrete type.
|
|
// This is easy: just compare the type number.
|
|
assertedTypeNum, typeExists := c.ir.TypeNum(expr.AssertedType)
|
|
if !typeExists {
|
|
// Static analysis has determined this type assert will never apply.
|
|
// Using undef here so that LLVM knows we'll never get here and
|
|
// can optimize accordingly.
|
|
undef := llvm.Undef(assertedType)
|
|
commaOk := llvm.ConstInt(llvm.Int1Type(), 0, false)
|
|
if expr.CommaOk {
|
|
return llvm.ConstStruct([]llvm.Value{undef, commaOk}, false), nil
|
|
} else {
|
|
c.createRuntimeCall("interfaceTypeAssert", []llvm.Value{commaOk}, "")
|
|
return undef, nil
|
|
}
|
|
}
|
|
if assertedTypeNum >= 1<<16 {
|
|
return llvm.Value{}, errors.New("interface typecodes do not fit in a 16-bit integer")
|
|
}
|
|
|
|
assertedTypeNumValue := llvm.ConstInt(llvm.Int16Type(), uint64(assertedTypeNum), false)
|
|
commaOk = c.builder.CreateICmp(llvm.IntEQ, assertedTypeNumValue, actualTypeNum, "")
|
|
}
|
|
|
|
// Add 2 new basic blocks (that should get optimized away): one for the
|
|
// 'ok' case and one for all instructions following this type assert.
|
|
// This is necessary because we need to insert the casted value or the
|
|
// nil value based on whether the assert was successful. Casting before
|
|
// this check tells LLVM that it can use this value and may
|
|
// speculatively dereference pointers before the check. This can lead to
|
|
// a miscompilation resulting in a segfault at runtime.
|
|
// Additionally, this is even required by the Go spec: a failed
|
|
// typeassert should return a zero value, not an incorrectly casted
|
|
// value.
|
|
|
|
prevBlock := c.builder.GetInsertBlock()
|
|
okBlock := c.ctx.AddBasicBlock(frame.fn.LLVMFn, "typeassert.ok")
|
|
nextBlock := c.ctx.AddBasicBlock(frame.fn.LLVMFn, "typeassert.next")
|
|
frame.blocks[frame.currentBlock] = nextBlock // adjust outgoing block for phi nodes
|
|
c.builder.CreateCondBr(commaOk, okBlock, nextBlock)
|
|
|
|
// Retrieve the value from the interface if the type assert was
|
|
// successful.
|
|
c.builder.SetInsertPointAtEnd(okBlock)
|
|
var valueOk llvm.Value
|
|
if _, ok := expr.AssertedType.Underlying().(*types.Interface); ok {
|
|
// Type assert on interface type. Easy: just return the same
|
|
// interface value.
|
|
valueOk = itf
|
|
} else {
|
|
// Type assert on concrete type. Extract the underlying type from
|
|
// the interface (but only after checking it matches).
|
|
valuePtr := c.builder.CreateExtractValue(itf, 1, "typeassert.value.ptr")
|
|
if c.targetData.TypeAllocSize(assertedType) > c.targetData.TypeAllocSize(c.i8ptrType) {
|
|
// Value was stored in an allocated buffer, load it from there.
|
|
valuePtrCast := c.builder.CreateBitCast(valuePtr, llvm.PointerType(assertedType, 0), "")
|
|
valueOk = c.builder.CreateLoad(valuePtrCast, "typeassert.value.ok")
|
|
} else {
|
|
// Value was stored directly in the interface.
|
|
switch assertedType.TypeKind() {
|
|
case llvm.IntegerTypeKind:
|
|
valueOk = c.builder.CreatePtrToInt(valuePtr, assertedType, "typeassert.value.ok")
|
|
case llvm.PointerTypeKind:
|
|
valueOk = c.builder.CreateBitCast(valuePtr, assertedType, "typeassert.value.ok")
|
|
case llvm.StructTypeKind:
|
|
// A bitcast would be useful here, but bitcast doesn't allow
|
|
// aggregate types. So we'll bitcast it using an alloca.
|
|
// Hopefully this will get optimized away.
|
|
mem := c.builder.CreateAlloca(c.i8ptrType, "")
|
|
c.builder.CreateStore(valuePtr, mem)
|
|
memStructPtr := c.builder.CreateBitCast(mem, llvm.PointerType(assertedType, 0), "")
|
|
valueOk = c.builder.CreateLoad(memStructPtr, "typeassert.value.ok")
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: typeassert: bitcast small types")
|
|
}
|
|
}
|
|
}
|
|
c.builder.CreateBr(nextBlock)
|
|
|
|
// Continue after the if statement.
|
|
c.builder.SetInsertPointAtEnd(nextBlock)
|
|
phi := c.builder.CreatePHI(assertedType, "typeassert.value")
|
|
phi.AddIncoming([]llvm.Value{valueNil, valueOk}, []llvm.BasicBlock{prevBlock, okBlock})
|
|
|
|
if expr.CommaOk {
|
|
tuple := llvm.ConstStruct([]llvm.Value{llvm.Undef(assertedType), llvm.Undef(llvm.Int1Type())}, false) // create empty tuple
|
|
tuple = c.builder.CreateInsertValue(tuple, phi, 0, "") // insert value
|
|
tuple = c.builder.CreateInsertValue(tuple, commaOk, 1, "") // insert 'comma ok' boolean
|
|
return tuple, nil
|
|
} else {
|
|
// This is kind of dirty as the branch above becomes mostly useless,
|
|
// but hopefully this gets optimized away.
|
|
c.createRuntimeCall("interfaceTypeAssert", []llvm.Value{commaOk}, "")
|
|
return phi, nil
|
|
}
|
|
case *ssa.UnOp:
|
|
return c.parseUnOp(frame, expr)
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: unknown expression: " + expr.String())
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseBinOp(frame *Frame, binop *ssa.BinOp) (llvm.Value, error) {
|
|
x, err := c.parseExpr(frame, binop.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
y, err := c.parseExpr(frame, binop.Y)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
switch typ := binop.X.Type().Underlying().(type) {
|
|
case *types.Basic:
|
|
if typ.Info()&types.IsInteger != 0 {
|
|
// Operations on integers
|
|
signed := typ.Info()&types.IsUnsigned == 0
|
|
switch binop.Op {
|
|
case token.ADD: // +
|
|
return c.builder.CreateAdd(x, y, ""), nil
|
|
case token.SUB: // -
|
|
return c.builder.CreateSub(x, y, ""), nil
|
|
case token.MUL: // *
|
|
return c.builder.CreateMul(x, y, ""), nil
|
|
case token.QUO: // /
|
|
if signed {
|
|
return c.builder.CreateSDiv(x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateUDiv(x, y, ""), nil
|
|
}
|
|
case token.REM: // %
|
|
if signed {
|
|
return c.builder.CreateSRem(x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateURem(x, y, ""), nil
|
|
}
|
|
case token.AND: // &
|
|
return c.builder.CreateAnd(x, y, ""), nil
|
|
case token.OR: // |
|
|
return c.builder.CreateOr(x, y, ""), nil
|
|
case token.XOR: // ^
|
|
return c.builder.CreateXor(x, y, ""), nil
|
|
case token.SHL, token.SHR:
|
|
sizeX := c.targetData.TypeAllocSize(x.Type())
|
|
sizeY := c.targetData.TypeAllocSize(y.Type())
|
|
if sizeX > sizeY {
|
|
// x and y must have equal sizes, make Y bigger in this case.
|
|
// y is unsigned, this has been checked by the Go type checker.
|
|
y = c.builder.CreateZExt(y, x.Type(), "")
|
|
} else if sizeX < sizeY {
|
|
// What about shifting more than the integer width?
|
|
// I'm not entirely sure what the Go spec is on that, but as
|
|
// Intel CPUs have undefined behavior when shifting more
|
|
// than the integer width I'm assuming it is also undefined
|
|
// in Go.
|
|
y = c.builder.CreateTrunc(y, x.Type(), "")
|
|
}
|
|
switch binop.Op {
|
|
case token.SHL: // <<
|
|
return c.builder.CreateShl(x, y, ""), nil
|
|
case token.SHR: // >>
|
|
if signed {
|
|
return c.builder.CreateAShr(x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateLShr(x, y, ""), nil
|
|
}
|
|
default:
|
|
panic("unreachable")
|
|
}
|
|
case token.EQL: // ==
|
|
return c.builder.CreateICmp(llvm.IntEQ, x, y, ""), nil
|
|
case token.NEQ: // !=
|
|
return c.builder.CreateICmp(llvm.IntNE, x, y, ""), nil
|
|
case token.AND_NOT: // &^
|
|
// Go specific. Calculate "and not" with x & (~y)
|
|
inv := c.builder.CreateNot(y, "") // ~y
|
|
return c.builder.CreateAnd(x, inv, ""), nil
|
|
case token.LSS: // <
|
|
if signed {
|
|
return c.builder.CreateICmp(llvm.IntSLT, x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateICmp(llvm.IntULT, x, y, ""), nil
|
|
}
|
|
case token.LEQ: // <=
|
|
if signed {
|
|
return c.builder.CreateICmp(llvm.IntSLE, x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateICmp(llvm.IntULE, x, y, ""), nil
|
|
}
|
|
case token.GTR: // >
|
|
if signed {
|
|
return c.builder.CreateICmp(llvm.IntSGT, x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateICmp(llvm.IntUGT, x, y, ""), nil
|
|
}
|
|
case token.GEQ: // >=
|
|
if signed {
|
|
return c.builder.CreateICmp(llvm.IntSGE, x, y, ""), nil
|
|
} else {
|
|
return c.builder.CreateICmp(llvm.IntUGE, x, y, ""), nil
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: binop on integer: " + binop.Op.String())
|
|
}
|
|
} else if typ.Info()&types.IsFloat != 0 {
|
|
// Operations on floats
|
|
switch binop.Op {
|
|
case token.ADD:
|
|
return c.builder.CreateFAdd(x, y, ""), nil
|
|
case token.SUB: // -
|
|
return c.builder.CreateFSub(x, y, ""), nil
|
|
case token.MUL: // *
|
|
return c.builder.CreateFMul(x, y, ""), nil
|
|
case token.QUO: // /
|
|
return c.builder.CreateFDiv(x, y, ""), nil
|
|
case token.REM: // %
|
|
return c.builder.CreateFRem(x, y, ""), nil
|
|
case token.EQL: // ==
|
|
return c.builder.CreateFCmp(llvm.FloatOEQ, x, y, ""), nil
|
|
case token.NEQ: // !=
|
|
return c.builder.CreateFCmp(llvm.FloatONE, x, y, ""), nil
|
|
case token.LSS: // <
|
|
return c.builder.CreateFCmp(llvm.FloatOLT, x, y, ""), nil
|
|
case token.LEQ: // <=
|
|
return c.builder.CreateFCmp(llvm.FloatOLE, x, y, ""), nil
|
|
case token.GTR: // >
|
|
return c.builder.CreateFCmp(llvm.FloatOGT, x, y, ""), nil
|
|
case token.GEQ: // >=
|
|
return c.builder.CreateFCmp(llvm.FloatOGE, x, y, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: binop on float: " + binop.Op.String())
|
|
}
|
|
} else if typ.Kind() == types.UnsafePointer {
|
|
// Operations on pointers
|
|
switch binop.Op {
|
|
case token.EQL: // ==
|
|
return c.builder.CreateICmp(llvm.IntEQ, x, y, ""), nil
|
|
case token.NEQ: // !=
|
|
return c.builder.CreateICmp(llvm.IntNE, x, y, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: binop on pointer: " + binop.Op.String())
|
|
}
|
|
} else if typ.Info()&types.IsString != 0 {
|
|
// Operations on strings
|
|
switch binop.Op {
|
|
case token.ADD:
|
|
return c.createRuntimeCall("stringConcat", []llvm.Value{x, y}, ""), nil
|
|
case token.EQL, token.NEQ: // ==, !=
|
|
result := c.createRuntimeCall("stringEqual", []llvm.Value{x, y}, "")
|
|
if binop.Op == token.NEQ {
|
|
result = c.builder.CreateNot(result, "")
|
|
}
|
|
return result, nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: binop on string: " + binop.Op.String())
|
|
}
|
|
} else {
|
|
return llvm.Value{}, errors.New("todo: unknown basic type in binop: " + typ.String())
|
|
}
|
|
case *types.Signature:
|
|
if c.ir.SignatureNeedsContext(typ) {
|
|
// This is a closure, not a function pointer. Get the underlying
|
|
// function pointer.
|
|
// This is safe: function pointers are generally not comparable
|
|
// against each other, only against nil. So one or both has to be
|
|
// nil, so we can ignore the contents of the closure.
|
|
x = c.builder.CreateExtractValue(x, 1, "")
|
|
y = c.builder.CreateExtractValue(y, 1, "")
|
|
}
|
|
switch binop.Op {
|
|
case token.EQL: // ==
|
|
return c.builder.CreateICmp(llvm.IntEQ, x, y, ""), nil
|
|
case token.NEQ: // !=
|
|
return c.builder.CreateICmp(llvm.IntNE, x, y, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("binop on signature: " + binop.Op.String())
|
|
}
|
|
case *types.Interface:
|
|
switch binop.Op {
|
|
case token.EQL, token.NEQ: // ==, !=
|
|
result := c.createRuntimeCall("interfaceEqual", []llvm.Value{x, y}, "")
|
|
if binop.Op == token.NEQ {
|
|
result = c.builder.CreateNot(result, "")
|
|
}
|
|
return result, nil
|
|
default:
|
|
return llvm.Value{}, errors.New("binop on interface: " + binop.Op.String())
|
|
}
|
|
case *types.Pointer:
|
|
switch binop.Op {
|
|
case token.EQL: // ==
|
|
return c.builder.CreateICmp(llvm.IntEQ, x, y, ""), nil
|
|
case token.NEQ: // !=
|
|
return c.builder.CreateICmp(llvm.IntNE, x, y, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: binop on pointer: " + binop.Op.String())
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("unknown binop type: " + binop.X.Type().String())
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseConst(prefix string, expr *ssa.Const) (llvm.Value, error) {
|
|
switch typ := expr.Type().Underlying().(type) {
|
|
case *types.Basic:
|
|
llvmType, err := c.getLLVMType(typ)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
if typ.Info()&types.IsBoolean != 0 {
|
|
b := constant.BoolVal(expr.Value)
|
|
n := uint64(0)
|
|
if b {
|
|
n = 1
|
|
}
|
|
return llvm.ConstInt(llvmType, n, false), nil
|
|
} else if typ.Info()&types.IsString != 0 {
|
|
str := constant.StringVal(expr.Value)
|
|
strLen := llvm.ConstInt(c.lenType, uint64(len(str)), false)
|
|
objname := prefix + "$string"
|
|
global := llvm.AddGlobal(c.mod, llvm.ArrayType(llvm.Int8Type(), len(str)), objname)
|
|
global.SetInitializer(c.ctx.ConstString(str, false))
|
|
global.SetLinkage(llvm.InternalLinkage)
|
|
global.SetGlobalConstant(true)
|
|
global.SetUnnamedAddr(true)
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
strPtr := c.builder.CreateInBoundsGEP(global, []llvm.Value{zero, zero}, "")
|
|
strObj := llvm.ConstNamedStruct(c.mod.GetTypeByName("runtime._string"), []llvm.Value{strPtr, strLen})
|
|
return strObj, nil
|
|
} else if typ.Kind() == types.UnsafePointer {
|
|
if !expr.IsNil() {
|
|
value, _ := constant.Uint64Val(expr.Value)
|
|
return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, value, false), c.i8ptrType), nil
|
|
}
|
|
return llvm.ConstNull(c.i8ptrType), nil
|
|
} else if typ.Info()&types.IsUnsigned != 0 {
|
|
n, _ := constant.Uint64Val(expr.Value)
|
|
return llvm.ConstInt(llvmType, n, false), nil
|
|
} else if typ.Info()&types.IsInteger != 0 { // signed
|
|
n, _ := constant.Int64Val(expr.Value)
|
|
return llvm.ConstInt(llvmType, uint64(n), true), nil
|
|
} else if typ.Info()&types.IsFloat != 0 {
|
|
n, _ := constant.Float64Val(expr.Value)
|
|
return llvm.ConstFloat(llvmType, n), nil
|
|
} else {
|
|
return llvm.Value{}, errors.New("todo: unknown constant: " + expr.String())
|
|
}
|
|
case *types.Signature:
|
|
if expr.Value != nil {
|
|
return llvm.Value{}, errors.New("non-nil signature constant")
|
|
}
|
|
sig, err := c.getLLVMType(expr.Type())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return getZeroValue(sig)
|
|
case *types.Interface:
|
|
if expr.Value != nil {
|
|
return llvm.Value{}, errors.New("non-nil interface constant")
|
|
}
|
|
// Create a generic nil interface with no dynamic type (typecode=0).
|
|
fields := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int16Type(), 0, false),
|
|
llvm.ConstPointerNull(c.i8ptrType),
|
|
}
|
|
itf := llvm.ConstNamedStruct(c.mod.GetTypeByName("runtime._interface"), fields)
|
|
return itf, nil
|
|
case *types.Pointer:
|
|
if expr.Value != nil {
|
|
return llvm.Value{}, errors.New("non-nil pointer constant")
|
|
}
|
|
llvmType, err := c.getLLVMType(typ)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
return llvm.ConstPointerNull(llvmType), nil
|
|
case *types.Slice:
|
|
if expr.Value != nil {
|
|
return llvm.Value{}, errors.New("non-nil slice constant")
|
|
}
|
|
elemType, err := c.getLLVMType(typ.Elem())
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
llvmPtr := llvm.ConstPointerNull(llvm.PointerType(elemType, 0))
|
|
llvmLen := llvm.ConstInt(c.lenType, 0, false)
|
|
slice := llvm.ConstStruct([]llvm.Value{
|
|
llvmPtr, // backing array
|
|
llvmLen, // len
|
|
llvmLen, // cap
|
|
}, false)
|
|
return slice, nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: unknown constant: " + expr.String())
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseConvert(typeFrom, typeTo types.Type, value llvm.Value) (llvm.Value, error) {
|
|
llvmTypeFrom := value.Type()
|
|
llvmTypeTo, err := c.getLLVMType(typeTo)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
// Conversion between unsafe.Pointer and uintptr.
|
|
isPtrFrom := isPointer(typeFrom.Underlying())
|
|
isPtrTo := isPointer(typeTo.Underlying())
|
|
if isPtrFrom && !isPtrTo {
|
|
return c.builder.CreatePtrToInt(value, llvmTypeTo, ""), nil
|
|
} else if !isPtrFrom && isPtrTo {
|
|
return c.builder.CreateIntToPtr(value, llvmTypeTo, ""), nil
|
|
}
|
|
|
|
// Conversion between pointers and unsafe.Pointer.
|
|
if isPtrFrom && isPtrTo {
|
|
return c.builder.CreateBitCast(value, llvmTypeTo, ""), nil
|
|
}
|
|
|
|
switch typeTo := typeTo.Underlying().(type) {
|
|
case *types.Basic:
|
|
sizeFrom := c.targetData.TypeAllocSize(llvmTypeFrom)
|
|
|
|
if typeTo.Info()&types.IsString != 0 {
|
|
switch typeFrom := typeFrom.Underlying().(type) {
|
|
case *types.Basic:
|
|
// Assume a Unicode code point, as that is the only possible
|
|
// value here.
|
|
// Cast to an i32 value as expected by
|
|
// runtime.stringFromUnicode.
|
|
if sizeFrom > 4 {
|
|
value = c.builder.CreateTrunc(value, llvm.Int32Type(), "")
|
|
} else if sizeFrom < 4 && typeTo.Info()&types.IsUnsigned != 0 {
|
|
value = c.builder.CreateZExt(value, llvm.Int32Type(), "")
|
|
} else if sizeFrom < 4 {
|
|
value = c.builder.CreateSExt(value, llvm.Int32Type(), "")
|
|
}
|
|
return c.createRuntimeCall("stringFromUnicode", []llvm.Value{value}, ""), nil
|
|
case *types.Slice:
|
|
switch typeFrom.Elem().(*types.Basic).Kind() {
|
|
case types.Byte:
|
|
return c.createRuntimeCall("stringFromBytes", []llvm.Value{value}, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: convert to string: " + typeFrom.String())
|
|
}
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: convert to string: " + typeFrom.String())
|
|
}
|
|
}
|
|
|
|
typeFrom := typeFrom.Underlying().(*types.Basic)
|
|
sizeTo := c.targetData.TypeAllocSize(llvmTypeTo)
|
|
|
|
if typeFrom.Info()&types.IsInteger != 0 && typeTo.Info()&types.IsInteger != 0 {
|
|
// Conversion between two integers.
|
|
if sizeFrom > sizeTo {
|
|
return c.builder.CreateTrunc(value, llvmTypeTo, ""), nil
|
|
} else if typeTo.Info()&types.IsUnsigned != 0 { // if unsigned
|
|
return c.builder.CreateZExt(value, llvmTypeTo, ""), nil
|
|
} else { // if signed
|
|
return c.builder.CreateSExt(value, llvmTypeTo, ""), nil
|
|
}
|
|
}
|
|
|
|
if typeFrom.Info()&types.IsFloat != 0 && typeTo.Info()&types.IsFloat != 0 {
|
|
// Conversion between two floats.
|
|
if sizeFrom > sizeTo {
|
|
return c.builder.CreateFPTrunc(value, llvmTypeTo, ""), nil
|
|
} else if sizeFrom < sizeTo {
|
|
return c.builder.CreateFPExt(value, llvmTypeTo, ""), nil
|
|
} else {
|
|
return value, nil
|
|
}
|
|
}
|
|
|
|
if typeFrom.Info()&types.IsFloat != 0 && typeTo.Info()&types.IsInteger != 0 {
|
|
// Conversion from float to int.
|
|
if typeTo.Info()&types.IsUnsigned != 0 { // to signed int
|
|
return c.builder.CreateFPToSI(value, llvmTypeTo, ""), nil
|
|
} else { // to unsigned int
|
|
return c.builder.CreateFPToUI(value, llvmTypeTo, ""), nil
|
|
}
|
|
}
|
|
|
|
if typeFrom.Info()&types.IsInteger != 0 && typeTo.Info()&types.IsFloat != 0 {
|
|
// Conversion from int to float.
|
|
if typeFrom.Info()&types.IsUnsigned != 0 { // from signed int
|
|
return c.builder.CreateSIToFP(value, llvmTypeTo, ""), nil
|
|
} else { // from unsigned int
|
|
return c.builder.CreateUIToFP(value, llvmTypeTo, ""), nil
|
|
}
|
|
}
|
|
|
|
return llvm.Value{}, errors.New("todo: convert: basic non-integer type: " + typeFrom.String() + " -> " + typeTo.String())
|
|
|
|
case *types.Slice:
|
|
if basic, ok := typeFrom.(*types.Basic); !ok || basic.Kind() != types.String {
|
|
panic("can only convert from a string to a slice")
|
|
}
|
|
|
|
elemType := typeTo.Elem().Underlying().(*types.Basic) // must be byte or rune
|
|
switch elemType.Kind() {
|
|
case types.Byte:
|
|
return c.createRuntimeCall("stringToBytes", []llvm.Value{value}, ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: convert from string: " + elemType.String())
|
|
}
|
|
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: convert " + typeTo.String() + " <- " + typeFrom.String())
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) parseMakeClosure(frame *Frame, expr *ssa.MakeClosure) (llvm.Value, error) {
|
|
if len(expr.Bindings) == 0 {
|
|
panic("unexpected: MakeClosure without bound variables")
|
|
}
|
|
f := c.ir.GetFunction(expr.Fn.(*ssa.Function))
|
|
if !c.ir.FunctionNeedsContext(f) {
|
|
// Maybe AnalyseFunctionPointers didn't run?
|
|
panic("MakeClosure on function signature without context")
|
|
}
|
|
|
|
// Collect all bound variables.
|
|
boundVars := make([]llvm.Value, 0, len(expr.Bindings))
|
|
boundVarTypes := make([]llvm.Type, 0, len(expr.Bindings))
|
|
for _, binding := range expr.Bindings {
|
|
// The context stores the bound variables.
|
|
llvmBoundVar, err := c.parseExpr(frame, binding)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
boundVars = append(boundVars, llvmBoundVar)
|
|
boundVarTypes = append(boundVarTypes, llvmBoundVar.Type())
|
|
}
|
|
contextType := llvm.StructType(boundVarTypes, false)
|
|
|
|
// Allocate memory for the context.
|
|
contextAlloc := llvm.Value{}
|
|
contextHeapAlloc := llvm.Value{}
|
|
if c.targetData.TypeAllocSize(contextType) <= c.targetData.TypeAllocSize(c.i8ptrType) {
|
|
// Context fits in a pointer - e.g. when it is a pointer. Store it
|
|
// directly in the stack after a convert.
|
|
// Because contextType is a struct and we have to cast it to a *i8,
|
|
// store it in an alloca first for bitcasting (store+bitcast+load).
|
|
contextAlloc = c.builder.CreateAlloca(contextType, "")
|
|
} else {
|
|
// Context is bigger than a pointer, so allocate it on the heap.
|
|
size := c.targetData.TypeAllocSize(contextType)
|
|
sizeValue := llvm.ConstInt(c.uintptrType, size, false)
|
|
contextHeapAlloc = c.createRuntimeCall("alloc", []llvm.Value{sizeValue}, "")
|
|
contextAlloc = c.builder.CreateBitCast(contextHeapAlloc, llvm.PointerType(contextType, 0), "")
|
|
}
|
|
|
|
// Store all bound variables in the alloca or heap pointer.
|
|
for i, boundVar := range boundVars {
|
|
indices := []llvm.Value{
|
|
llvm.ConstInt(llvm.Int32Type(), 0, false),
|
|
llvm.ConstInt(llvm.Int32Type(), uint64(i), false),
|
|
}
|
|
gep := c.builder.CreateInBoundsGEP(contextAlloc, indices, "")
|
|
c.builder.CreateStore(boundVar, gep)
|
|
}
|
|
|
|
context := llvm.Value{}
|
|
if c.targetData.TypeAllocSize(contextType) <= c.targetData.TypeAllocSize(c.i8ptrType) {
|
|
// Load value (as *i8) from the alloca.
|
|
contextAlloc = c.builder.CreateBitCast(contextAlloc, llvm.PointerType(c.i8ptrType, 0), "")
|
|
context = c.builder.CreateLoad(contextAlloc, "")
|
|
} else {
|
|
// Get the original heap allocation pointer, which already is an
|
|
// *i8.
|
|
context = contextHeapAlloc
|
|
}
|
|
|
|
// Get the function signature type, which is a closure type.
|
|
// A closure is a tuple of {context, function pointer}.
|
|
typ, err := c.getLLVMType(f.Signature)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
|
|
// Create the closure, which is a struct: {context, function pointer}.
|
|
closure, err := getZeroValue(typ)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
closure = c.builder.CreateInsertValue(closure, f.LLVMFn, 1, "")
|
|
closure = c.builder.CreateInsertValue(closure, context, 0, "")
|
|
return closure, nil
|
|
}
|
|
|
|
func (c *Compiler) parseMakeInterface(val llvm.Value, typ types.Type, global string) (llvm.Value, error) {
|
|
var itfValue llvm.Value
|
|
size := c.targetData.TypeAllocSize(val.Type())
|
|
if size > c.targetData.TypeAllocSize(c.i8ptrType) {
|
|
if global != "" {
|
|
// Allocate in a global variable.
|
|
global := llvm.AddGlobal(c.mod, val.Type(), global+"$itfvalue")
|
|
global.SetInitializer(val)
|
|
global.SetLinkage(llvm.InternalLinkage)
|
|
global.SetGlobalConstant(true)
|
|
zero := llvm.ConstInt(llvm.Int32Type(), 0, false)
|
|
itfValueRaw := llvm.ConstInBoundsGEP(global, []llvm.Value{zero, zero})
|
|
itfValue = llvm.ConstBitCast(itfValueRaw, c.i8ptrType)
|
|
} else {
|
|
// Allocate on the heap and put a pointer in the interface.
|
|
// TODO: escape analysis.
|
|
sizeValue := llvm.ConstInt(c.uintptrType, size, false)
|
|
itfValue = c.createRuntimeCall("alloc", []llvm.Value{sizeValue}, "")
|
|
itfValueCast := c.builder.CreateBitCast(itfValue, llvm.PointerType(val.Type(), 0), "")
|
|
c.builder.CreateStore(val, itfValueCast)
|
|
}
|
|
} else {
|
|
// Directly place the value in the interface.
|
|
switch val.Type().TypeKind() {
|
|
case llvm.IntegerTypeKind:
|
|
itfValue = c.builder.CreateIntToPtr(val, c.i8ptrType, "")
|
|
case llvm.PointerTypeKind:
|
|
itfValue = c.builder.CreateBitCast(val, c.i8ptrType, "")
|
|
case llvm.StructTypeKind:
|
|
// A bitcast would be useful here, but bitcast doesn't allow
|
|
// aggregate types. So we'll bitcast it using an alloca.
|
|
// Hopefully this will get optimized away.
|
|
mem := c.builder.CreateAlloca(c.i8ptrType, "")
|
|
memStructPtr := c.builder.CreateBitCast(mem, llvm.PointerType(val.Type(), 0), "")
|
|
c.builder.CreateStore(val, memStructPtr)
|
|
itfValue = c.builder.CreateLoad(mem, "")
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: makeinterface: cast small type to i8*")
|
|
}
|
|
}
|
|
itfTypeNum, _ := c.ir.TypeNum(typ)
|
|
if itfTypeNum >= 1<<16 {
|
|
return llvm.Value{}, errors.New("interface typecodes do not fit in a 16-bit integer")
|
|
}
|
|
itf := llvm.ConstNamedStruct(c.mod.GetTypeByName("runtime._interface"), []llvm.Value{llvm.ConstInt(llvm.Int16Type(), uint64(itfTypeNum), false), llvm.Undef(c.i8ptrType)})
|
|
itf = c.builder.CreateInsertValue(itf, itfValue, 1, "")
|
|
return itf, nil
|
|
}
|
|
|
|
func (c *Compiler) parseUnOp(frame *Frame, unop *ssa.UnOp) (llvm.Value, error) {
|
|
x, err := c.parseExpr(frame, unop.X)
|
|
if err != nil {
|
|
return llvm.Value{}, err
|
|
}
|
|
switch unop.Op {
|
|
case token.NOT: // !x
|
|
return c.builder.CreateNot(x, ""), nil
|
|
case token.SUB: // -x
|
|
if typ, ok := unop.X.Type().Underlying().(*types.Basic); ok {
|
|
if typ.Info()&types.IsInteger != 0 {
|
|
return c.builder.CreateSub(llvm.ConstInt(x.Type(), 0, false), x, ""), nil
|
|
} else if typ.Info()&types.IsFloat != 0 {
|
|
return c.builder.CreateFSub(llvm.ConstFloat(x.Type(), 0.0), x, ""), nil
|
|
} else {
|
|
return llvm.Value{}, errors.New("todo: unknown basic type for negate: " + typ.String())
|
|
}
|
|
} else {
|
|
return llvm.Value{}, errors.New("todo: unknown type for negate: " + unop.X.Type().Underlying().String())
|
|
}
|
|
case token.MUL: // *x, dereference pointer
|
|
valType := unop.X.Type().(*types.Pointer).Elem()
|
|
load := c.builder.CreateLoad(x, "")
|
|
if c.ir.IsVolatile(valType) {
|
|
// Volatile load, for memory-mapped registers.
|
|
load.SetVolatile(true)
|
|
}
|
|
return load, nil
|
|
case token.XOR: // ^x, toggle all bits in integer
|
|
return c.builder.CreateXor(x, llvm.ConstInt(x.Type(), ^uint64(0), false), ""), nil
|
|
default:
|
|
return llvm.Value{}, errors.New("todo: unknown unop")
|
|
}
|
|
}
|
|
|
|
// IR returns the whole IR as a human-readable string.
|
|
func (c *Compiler) IR() string {
|
|
return c.mod.String()
|
|
}
|
|
|
|
func (c *Compiler) Verify() error {
|
|
return llvm.VerifyModule(c.mod, 0)
|
|
}
|
|
|
|
func (c *Compiler) ApplyFunctionSections() {
|
|
// Put every function in a separate section. This makes it possible for the
|
|
// linker to remove dead code (-ffunction-sections).
|
|
llvmFn := c.mod.FirstFunction()
|
|
for !llvmFn.IsNil() {
|
|
if !llvmFn.IsDeclaration() {
|
|
name := llvmFn.Name()
|
|
llvmFn.SetSection(".text." + name)
|
|
}
|
|
llvmFn = llvm.NextFunction(llvmFn)
|
|
}
|
|
}
|
|
|
|
// Turn all global constants into global variables. This works around a
|
|
// limitation on Harvard architectures (e.g. AVR), where constant and
|
|
// non-constant pointers point to a different address space.
|
|
func (c *Compiler) NonConstGlobals() {
|
|
global := c.mod.FirstGlobal()
|
|
for !global.IsNil() {
|
|
global.SetGlobalConstant(false)
|
|
global = llvm.NextGlobal(global)
|
|
}
|
|
}
|
|
|
|
func (c *Compiler) Optimize(optLevel, sizeLevel int, inlinerThreshold uint) {
|
|
builder := llvm.NewPassManagerBuilder()
|
|
defer builder.Dispose()
|
|
builder.SetOptLevel(optLevel)
|
|
builder.SetSizeLevel(sizeLevel)
|
|
if inlinerThreshold != 0 {
|
|
builder.UseInlinerWithThreshold(inlinerThreshold)
|
|
}
|
|
builder.AddCoroutinePassesToExtensionPoints()
|
|
|
|
// Run function passes for each function.
|
|
funcPasses := llvm.NewFunctionPassManagerForModule(c.mod)
|
|
defer funcPasses.Dispose()
|
|
builder.PopulateFunc(funcPasses)
|
|
funcPasses.InitializeFunc()
|
|
for fn := c.mod.FirstFunction(); !fn.IsNil(); fn = llvm.NextFunction(fn) {
|
|
funcPasses.RunFunc(fn)
|
|
}
|
|
funcPasses.FinalizeFunc()
|
|
|
|
// Run module passes.
|
|
modPasses := llvm.NewPassManager()
|
|
defer modPasses.Dispose()
|
|
builder.Populate(modPasses)
|
|
modPasses.Run(c.mod)
|
|
}
|
|
|
|
// Emit object file (.o).
|
|
func (c *Compiler) EmitObject(path string) error {
|
|
llvmBuf, err := c.machine.EmitToMemoryBuffer(c.mod, llvm.ObjectFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return c.writeFile(llvmBuf.Bytes(), path)
|
|
}
|
|
|
|
// Emit LLVM bitcode file (.bc).
|
|
func (c *Compiler) EmitBitcode(path string) error {
|
|
data := llvm.WriteBitcodeToMemoryBuffer(c.mod).Bytes()
|
|
return c.writeFile(data, path)
|
|
}
|
|
|
|
// Emit LLVM IR source file (.ll).
|
|
func (c *Compiler) EmitText(path string) error {
|
|
data := []byte(c.mod.String())
|
|
return c.writeFile(data, path)
|
|
}
|
|
|
|
// Write the data to the file specified by path.
|
|
func (c *Compiler) writeFile(data []byte, path string) error {
|
|
// Write output to file
|
|
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = f.Write(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return f.Close()
|
|
}
|