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44 lines
1.4 KiB
44 lines
1.4 KiB
4 months ago
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; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s
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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-emscripten"
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; Tests if an alias to a function (here malloc) is correctly handled as a
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; function that cannot longjmp.
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%struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] }
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@malloc = weak alias i8* (i32), i8* (i32)* @dlmalloc
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; CHECK-LABEL: @malloc_test
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define void @malloc_test() {
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entry:
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; CHECK-LABEL: entry
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; All setjmp table preparations have to happen within the entry block. These
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; check lines list only some of the instructions for that.
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; CHECK: call i8* @malloc
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; CHECK: call i32* @saveSetjmp
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; CHECK: call i32 @getTempRet0
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%retval = alloca i32, align 4
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%jmp = alloca [1 x %struct.__jmp_buf_tag], align 16
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store i32 0, i32* %retval, align 4
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%arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %jmp, i32 0, i32 0
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%call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0
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ret void
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; CHECK-LABEL: entry.split
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; CHECK: call void @free
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; CHECK: ret void
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}
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; This is a dummy dlmalloc implemenation only to make compiler pass, because an
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; alias (malloc) has to point an actual definition.
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define i8* @dlmalloc(i32) {
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%p = inttoptr i32 0 to i8*
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ret i8* %p
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}
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; Function Attrs: returns_twice
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declare i32 @setjmp(%struct.__jmp_buf_tag*) #0
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attributes #0 = { returns_twice }
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