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.
139 строки
7,5 КиБ
LLVM
139 строки
7,5 КиБ
LLVM
; ModuleID = 'gc.go'
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source_filename = "gc.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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@main.scalar1 = hidden global ptr null, align 4
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@main.scalar2 = hidden global ptr null, align 4
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@main.scalar3 = hidden global ptr null, align 4
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@main.scalar4 = hidden global ptr null, align 4
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@main.array1 = hidden global ptr null, align 4
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@main.array2 = hidden global ptr null, align 4
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@main.array3 = hidden global ptr null, align 4
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@main.struct1 = hidden global ptr null, align 4
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@main.struct2 = hidden global ptr null, align 4
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@main.struct3 = hidden global ptr null, align 4
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@main.struct4 = hidden global ptr null, align 4
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@main.slice1 = hidden global { ptr, i32, i32 } zeroinitializer, align 8
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@main.slice2 = hidden global { ptr, i32, i32 } zeroinitializer, align 8
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@main.slice3 = hidden global { ptr, i32, i32 } zeroinitializer, align 8
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@"runtime/gc.layout:62-2000000000000001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00 " }
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@"runtime/gc.layout:62-0001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00\00" }
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@"reflect/types.type:basic:complex128" = linkonce_odr constant { i8, ptr } { i8 16, ptr @"reflect/types.type:pointer:basic:complex128" }, align 4
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@"reflect/types.type:pointer:basic:complex128" = linkonce_odr constant { i8, ptr } { i8 21, ptr @"reflect/types.type:basic:complex128" }, align 4
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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 void @main.newScalar(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%new = call ptr @runtime.alloc(i32 1, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new, ptr @main.scalar1, align 4
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%new1 = call ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new1, ptr @main.scalar2, align 4
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%new2 = call ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new2, ptr @main.scalar3, align 4
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%new3 = call ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new3, ptr @main.scalar4, align 4
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.newArray(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%new = call ptr @runtime.alloc(i32 3, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new, ptr @main.array1, align 4
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%new1 = call ptr @runtime.alloc(i32 71, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new1, ptr @main.array2, align 4
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%new2 = call ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new2, ptr @main.array3, align 4
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.newStruct(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%new = call ptr @runtime.alloc(i32 0, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new, ptr @main.struct1, align 4
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%new1 = call ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new1, ptr @main.struct2, align 4
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%new2 = call ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-2000000000000001", ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new2, ptr @main.struct3, align 4
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%new3 = call ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0001", ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %new3, ptr @main.struct4, align 4
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ret void
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}
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; Function Attrs: nounwind
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define hidden ptr @main.newFuncValue(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%new = call ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 197 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #2
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ret ptr %new
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}
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; Function Attrs: nounwind
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define hidden void @main.makeSlice(ptr %context) unnamed_addr #1 {
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entry:
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%stackalloc = alloca i8, align 1
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%makeslice = call ptr @runtime.alloc(i32 5, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %makeslice, ptr @main.slice1, align 8
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice1, i32 0, i32 1), align 4
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice1, i32 0, i32 2), align 8
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%makeslice1 = call ptr @runtime.alloc(i32 20, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %makeslice1, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %makeslice1, ptr @main.slice2, align 8
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice2, i32 0, i32 1), align 4
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice2, i32 0, i32 2), align 8
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%makeslice3 = call ptr @runtime.alloc(i32 60, ptr nonnull inttoptr (i32 71 to ptr), ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %makeslice3, ptr nonnull %stackalloc, ptr undef) #2
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store ptr %makeslice3, ptr @main.slice3, align 8
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice3, i32 0, i32 1), align 4
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store i32 5, ptr getelementptr inbounds ({ ptr, i32, i32 }, ptr @main.slice3, i32 0, i32 2), align 8
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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.makeInterface(double %v.r, double %v.i, 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 ptr @runtime.alloc(i32 16, ptr null, ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #2
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store double %v.r, ptr %0, align 8
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%.repack1 = getelementptr inbounds { double, double }, ptr %0, i32 0, i32 1
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store double %v.i, ptr %.repack1, align 8
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%1 = insertvalue %runtime._interface { ptr @"reflect/types.type:basic:complex128", ptr undef }, ptr %0, 1
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call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:complex128", ptr nonnull %stackalloc, ptr undef) #2
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call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #2
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ret %runtime._interface %1
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}
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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 = { nounwind }
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