7c24925aa7
This matches the behavior of Clang, which uses optsize for -Os and adds minsize for -Oz. The code size change is all over the map, but using a hacked together size comparison tool I've found that there is a slight reduction in binary size overall (-1.6% with the tinygo smoke tests and -0.8% for the drivers smoke test).
31 строка
1,3 КиБ
Go
31 строка
1,3 КиБ
Go
// Package transform contains transformation passes for the TinyGo compiler.
|
|
// These transformation passes may be optimization passes or lowering passes.
|
|
//
|
|
// Optimization passes transform the IR in such a way that they increase the
|
|
// performance of the generated code and/or help the LLVM optimizer better do
|
|
// its job by simplifying the IR. This usually means that certain
|
|
// TinyGo-specific runtime calls are removed or replaced with something simpler
|
|
// if that is a valid operation.
|
|
//
|
|
// Lowering passes are usually required to run. One example is the interface
|
|
// lowering pass, which replaces stub runtime calls to get an interface method
|
|
// with the method implementation (either a direct call or a thunk).
|
|
package transform
|
|
|
|
import (
|
|
"github.com/tinygo-org/tinygo/compileopts"
|
|
"tinygo.org/x/go-llvm"
|
|
)
|
|
|
|
// AddStandardAttributes is a helper function to add standard function
|
|
// attributes to a function. For example, it adds optsize when requested from
|
|
// the -opt= compiler flag.
|
|
func AddStandardAttributes(fn llvm.Value, config *compileopts.Config) {
|
|
_, sizeLevel, _ := config.OptLevels()
|
|
if sizeLevel >= 1 {
|
|
fn.AddFunctionAttr(fn.Type().Context().CreateEnumAttribute(llvm.AttributeKindID("optsize"), 0))
|
|
}
|
|
if sizeLevel >= 2 {
|
|
fn.AddFunctionAttr(fn.Type().Context().CreateEnumAttribute(llvm.AttributeKindID("minsize"), 0))
|
|
}
|
|
}
|