c1d697f868
This PR fixes two bugs at once:
1. Indices were incorrectly extended to a bigger type. Specifically,
unsigned integers were sign extended and signed integers were zero
extended. This commit swaps them around.
2. The getelementptr instruction was given the raw index, even if it
was a uint8 for example. However, getelementptr assumes the indices
are signed, and therefore an index of uint8(200) was interpreted as
an index of int8(-56).
98 строки
3,3 КиБ
LLVM
98 строки
3,3 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-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-wasi"
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%runtime._string = type { i8*, i32 }
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@"main$string" = internal unnamed_addr constant [3 x i8] c"foo", align 1
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declare noalias nonnull i8* @runtime.alloc(i32, i8*, i8*, i8*)
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; Function Attrs: nounwind
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define hidden void @main.init(i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden %runtime._string @main.someString(i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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ret %runtime._string { i8* getelementptr inbounds ([3 x i8], [3 x i8]* @"main$string", i32 0, i32 0), i32 3 }
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}
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; Function Attrs: nounwind
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define hidden %runtime._string @main.zeroLengthString(i8* %context, i8* %parentHandle) unnamed_addr #0 {
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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(i8* %s.data, i32 %s.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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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(i8* %s.data, i32 %s.len, i32 %index, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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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.throw: ; preds = %entry
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call void @runtime.lookupPanic(i8* undef, i8* null) #0
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unreachable
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lookup.next: ; preds = %entry
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%0 = getelementptr inbounds i8, i8* %s.data, i32 %index
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%1 = load i8, i8* %0, align 1
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ret i8 %1
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}
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declare void @runtime.lookupPanic(i8*, i8*)
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; Function Attrs: nounwind
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define hidden i1 @main.stringCompareEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
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ret i1 %0
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}
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declare i1 @runtime.stringEqual(i8*, i32, i8*, i32, i8*, i8*)
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; Function Attrs: nounwind
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define hidden i1 @main.stringCompareUnequal(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
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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(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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%0 = call i1 @runtime.stringLess(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
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%1 = xor i1 %0, true
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ret i1 %1
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}
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declare i1 @runtime.stringLess(i8*, i32, i8*, i32, i8*, i8*)
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; Function Attrs: nounwind
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define hidden i8 @main.stringLookup(i8* %s.data, i32 %s.len, i8 %x, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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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.throw: ; preds = %entry
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call void @runtime.lookupPanic(i8* undef, i8* null) #0
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unreachable
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lookup.next: ; preds = %entry
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%1 = getelementptr inbounds i8, i8* %s.data, i32 %0
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%2 = load i8, i8* %1, align 1
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ret i8 %2
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}
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attributes #0 = { nounwind }
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