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80e3983b83
If the size of an AST entry changes, we also need to make sure we perform necessary alias set merges, as the new size may overlap pointers in other sets. We happen to run into this with memset, because memset allows an entry for a i8* pointer to have a decidedly non-i8 size. This fixes PR27262. Differential Revision: http://reviews.llvm.org/D18939 llvm-svn: 266381
34 lines
820 B
LLVM
34 lines
820 B
LLVM
; RUN: opt -S -basicaa -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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; 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 i8 1, i8* %p
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; CHECK-NEXT: store i8 2, i8* %p1
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; CHECK-NEXT: 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, i8* %p) {
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entry:
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%p1 = getelementptr i8, i8* %p, i32 1
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br label %for.body
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for.body:
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store i8 1, i8* %p, align 1
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store i8 2, i8* %p1, align 1
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call void @llvm.memset.p0i8.i32(i8* %p, i8 255, i32 4, i32 1, 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, i32, i1)
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