4e8453167f
This is a big commit that changes the way runtime type information is stored in
the binary. Instead of compressing it and storing it in a number of sidetables,
it is stored similar to how the Go compiler toolchain stores it (but still more
compactly).
This has a number of advantages:
* It is much easier to add new features to reflect support. They can simply
be added to these structs without requiring massive changes (especially in
the reflect lowering pass).
* It removes the reflect lowering pass, which was a large amount of hard to
understand and debug code.
* The reflect lowering pass also required merging all LLVM IR into one
module, which is terrible for performance especially when compiling large
amounts of code. See issue 2870 for details.
* It is (probably!) easier to reason about for the compiler.
The downside is that it increases code size a bit, especially when reflect is
involved. I hope to fix some of that in later patches.
137 строки
7,2 КиБ
LLVM
137 строки
7,2 КиБ
LLVM
; ModuleID = 'interface.go'
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source_filename = "interface.go"
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target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
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target triple = "wasm32-unknown-wasi"
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%runtime._interface = type { ptr, ptr }
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%runtime._string = type { ptr, i32 }
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@"reflect/types.type:basic:int" = linkonce_odr constant { i8, ptr } { i8 2, ptr @"reflect/types.type:pointer:basic:int" }, align 4
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@"reflect/types.type:pointer:basic:int" = linkonce_odr constant { i8, ptr } { i8 21, ptr @"reflect/types.type:basic:int" }, align 4
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@"reflect/types.type:pointer:named:error" = linkonce_odr constant { i8, ptr } { i8 21, ptr @"reflect/types.type:named:error" }, align 4
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@"reflect/types.type:named:error" = linkonce_odr constant { i8, ptr, ptr } { i8 52, ptr @"reflect/types.type:pointer:named:error", ptr @"reflect/types.type:interface:{Error:func:{}{basic:string}}" }, align 4
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@"reflect/types.type:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 20, ptr @"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" }, align 4
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@"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 21, ptr @"reflect/types.type:interface:{Error:func:{}{basic:string}}" }, align 4
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@"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 21, ptr @"reflect/types.type:interface:{String:func:{}{basic:string}}" }, align 4
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@"reflect/types.type:interface:{String:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 20, ptr @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" }, align 4
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@"reflect/types.typeid:basic:int" = external constant i8
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declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
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declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #0
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; Function Attrs: nounwind
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define hidden void @main.init(ptr %context) unnamed_addr #1 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden %runtime._interface @main.simpleType(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:int", ptr nonnull %stackalloc, ptr undef) #6
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call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #6
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ret %runtime._interface { ptr @"reflect/types.type:basic:int", ptr null }
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}
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; Function Attrs: nounwind
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define hidden %runtime._interface @main.pointerType(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:basic:int", ptr nonnull %stackalloc, ptr undef) #6
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call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #6
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ret %runtime._interface { ptr @"reflect/types.type:pointer:basic:int", ptr null }
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}
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; Function Attrs: nounwind
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define hidden %runtime._interface @main.interfaceType(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:named:error", ptr nonnull %stackalloc, ptr undef) #6
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call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #6
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ret %runtime._interface { ptr @"reflect/types.type:pointer:named:error", ptr null }
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}
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; Function Attrs: nounwind
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define hidden %runtime._interface @main.anonymousInterfaceType(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", ptr nonnull %stackalloc, ptr undef) #6
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call void @runtime.trackPointer(ptr null, ptr nonnull %stackalloc, ptr undef) #6
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ret %runtime._interface { ptr @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", ptr null }
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}
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; Function Attrs: nounwind
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define hidden i1 @main.isInt(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
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entry:
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%typecode = call i1 @runtime.typeAssert(ptr %itf.typecode, ptr nonnull @"reflect/types.typeid:basic:int", ptr undef) #6
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br i1 %typecode, label %typeassert.ok, label %typeassert.next
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typeassert.next: ; preds = %typeassert.ok, %entry
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ret i1 %typecode
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typeassert.ok: ; preds = %entry
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br label %typeassert.next
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}
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declare i1 @runtime.typeAssert(ptr, ptr dereferenceable_or_null(1), ptr) #0
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; Function Attrs: nounwind
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define hidden i1 @main.isError(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
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entry:
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%0 = call i1 @"interface:{Error:func:{}{basic:string}}.$typeassert"(ptr %itf.typecode) #6
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br i1 %0, label %typeassert.ok, label %typeassert.next
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typeassert.next: ; preds = %typeassert.ok, %entry
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ret i1 %0
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typeassert.ok: ; preds = %entry
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br label %typeassert.next
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}
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declare i1 @"interface:{Error:func:{}{basic:string}}.$typeassert"(ptr) #2
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; Function Attrs: nounwind
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define hidden i1 @main.isStringer(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
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entry:
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%0 = call i1 @"interface:{String:func:{}{basic:string}}.$typeassert"(ptr %itf.typecode) #6
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br i1 %0, label %typeassert.ok, label %typeassert.next
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typeassert.next: ; preds = %typeassert.ok, %entry
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ret i1 %0
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typeassert.ok: ; preds = %entry
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br label %typeassert.next
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}
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declare i1 @"interface:{String:func:{}{basic:string}}.$typeassert"(ptr) #3
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; Function Attrs: nounwind
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define hidden i8 @main.callFooMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
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entry:
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%0 = call i8 @"interface:{String:func:{}{basic:string},main.foo:func:{basic:int}{basic:uint8}}.foo$invoke"(ptr %itf.value, i32 3, ptr %itf.typecode, ptr undef) #6
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ret i8 %0
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}
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declare i8 @"interface:{String:func:{}{basic:string},main.foo:func:{basic:int}{basic:uint8}}.foo$invoke"(ptr, i32, ptr, ptr) #4
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; Function Attrs: nounwind
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define hidden %runtime._string @main.callErrorMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%0 = call %runtime._string @"interface:{Error:func:{}{basic:string}}.Error$invoke"(ptr %itf.value, ptr %itf.typecode, ptr undef) #6
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%1 = extractvalue %runtime._string %0, 0
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call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef) #6
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ret %runtime._string %0
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}
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declare %runtime._string @"interface:{Error:func:{}{basic:string}}.Error$invoke"(ptr, ptr, ptr) #5
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attributes #0 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #1 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #2 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.Error() string" }
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attributes #3 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "tinygo-methods"="reflect/methods.String() string" }
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attributes #4 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
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attributes #5 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
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attributes #6 = { nounwind }
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