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.
103 строки
3,5 КиБ
LLVM
103 строки
3,5 КиБ
LLVM
; ModuleID = 'string.go'
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source_filename = "string.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._string = type { ptr, i32 }
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@"main$string" = internal unnamed_addr constant [3 x i8] c"foo", align 1
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; Function Attrs: allockind("alloc,zeroed") allocsize(0)
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declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
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declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
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; Function Attrs: nounwind
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define hidden void @main.init(ptr %context) unnamed_addr #2 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden %runtime._string @main.someString(ptr %context) unnamed_addr #2 {
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entry:
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ret %runtime._string { ptr @"main$string", i32 3 }
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}
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; Function Attrs: nounwind
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define hidden %runtime._string @main.zeroLengthString(ptr %context) unnamed_addr #2 {
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entry:
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ret %runtime._string zeroinitializer
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}
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; Function Attrs: nounwind
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define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
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entry:
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ret i32 %s.len
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}
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; Function Attrs: nounwind
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define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
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entry:
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%.not = icmp ult i32 %index, %s.len
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br i1 %.not, label %lookup.next, label %lookup.throw
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lookup.next: ; preds = %entry
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%0 = getelementptr inbounds i8, ptr %s.data, i32 %index
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%1 = load i8, ptr %0, align 1
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ret i8 %1
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lookup.throw: ; preds = %entry
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call void @runtime.lookupPanic(ptr undef) #3
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unreachable
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}
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declare void @runtime.lookupPanic(ptr) #1
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; Function Attrs: nounwind
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define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
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entry:
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%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
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ret i1 %0
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}
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declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #1
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; Function Attrs: nounwind
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define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
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entry:
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%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
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%1 = xor i1 %0, true
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ret i1 %1
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}
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; Function Attrs: nounwind
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define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
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entry:
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%0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #3
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ret i1 %0
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}
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declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
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; Function Attrs: nounwind
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define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
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entry:
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%0 = zext i8 %x to i32
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%.not = icmp ult i32 %0, %s.len
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br i1 %.not, label %lookup.next, label %lookup.throw
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lookup.next: ; preds = %entry
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%1 = getelementptr inbounds i8, ptr %s.data, i32 %0
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%2 = load i8, ptr %1, align 1
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ret i8 %2
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lookup.throw: ; preds = %entry
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call void @runtime.lookupPanic(ptr undef) #3
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unreachable
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}
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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 }
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