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33 lines
786 B
LLVM
33 lines
786 B
LLVM
; RUN: opt -S -basic-aa -licm < %s | FileCheck %s
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.0"
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@v = common global i32 zeroinitializer, align 4
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; Make sure the store to v is not sunk past the memset
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; CHECK-LABEL: @main
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; CHECK: for.body:
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; CHECK-NEXT: store i32 1, i32* @v
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; CHECK-NEXT: tail call void @llvm.memset
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; CHECK: end:
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; CHECK-NEXT: ret i32 0
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define i32 @main(i1 %k) {
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entry:
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br label %for.body
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for.body:
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store i32 1, i32* @v, align 4
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tail call void @llvm.memset.p0i8.i32(i8* align 4 bitcast (i32* @v to i8*), i8 0, i32 4, i1 false)
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br label %for.latch
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for.latch:
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br i1 %k, label %for.body, label %end
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end:
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ret i32 0
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}
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1)
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