f180339d6b
This gives a small improvement now, and is needed to be able to use the
Heap2Stack transform that's available in the Attributor pass. This
Heap2Stack transform could replace our custom OptimizeAllocs pass.
Most of the changes are just IR that changed, the actual change is
relatively small.
To give an example of why this is useful, here is the code size before
this change:
$ tinygo build -o test -size=short ./testdata/stdlib.go
code data bss | flash ram
95620 1812 968 | 97432 2780
$ tinygo build -o test -size=short ./testdata/stdlib.go
code data bss | flash ram
95380 1812 968 | 97192 2780
That's a 0.25% reduction. Not a whole lot, but nice for such a small
patch.
71 строка
2,8 КиБ
LLVM
71 строка
2,8 КиБ
LLVM
; ModuleID = 'pragma.go'
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source_filename = "pragma.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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@extern_global = external global [0 x i8], align 1
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@main.alignedGlobal = hidden global [4 x i32] zeroinitializer, align 32
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@main.alignedGlobal16 = hidden global [4 x i32] zeroinitializer, align 16
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@llvm.used = appending global [2 x ptr] [ptr @extern_func, ptr @exportedFunctionInSection]
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@main.globalInSection = hidden global i32 0, section ".special_global_section", align 4
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@undefinedGlobalNotInSection = external global i32, align 4
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@main.multipleGlobalPragmas = hidden global i32 0, section ".global_section", align 1024
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; Function Attrs: allockind("alloc,zeroed") allocsize(0)
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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) #1
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; Function Attrs: nounwind
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define hidden void @main.init(ptr %context) unnamed_addr #2 {
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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 void @extern_func() #3 {
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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 @somepkg.someFunction1(ptr %context) unnamed_addr #2 {
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entry:
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ret void
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}
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declare void @somepkg.someFunction2(ptr) #1
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; Function Attrs: inlinehint nounwind
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define hidden void @main.inlineFunc(ptr %context) unnamed_addr #4 {
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entry:
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ret void
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}
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; Function Attrs: noinline nounwind
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define hidden void @main.noinlineFunc(ptr %context) unnamed_addr #5 {
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entry:
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ret void
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}
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; Function Attrs: noinline nounwind
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define hidden void @main.functionInSection(ptr %context) unnamed_addr #5 section ".special_function_section" {
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entry:
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ret void
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}
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; Function Attrs: noinline nounwind
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define void @exportedFunctionInSection() #6 section ".special_function_section" {
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entry:
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ret void
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}
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declare void @main.undefinedFunctionNotInSection(ptr) #1
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attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #1 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #3 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="extern_func" "wasm-import-module"="env" "wasm-import-name"="extern_func" }
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attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" "wasm-export-name"="exportedFunctionInSection" "wasm-import-module"="env" "wasm-import-name"="exportedFunctionInSection" }
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