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fix an issue in IsPointerOffset that prevented us from recognizing that

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P and P+1 are relative to the same base pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123087 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-01-08 21:07:56 +00:00
parent 06511264f8
commit 9fa11e94b5
2 changed files with 31 additions and 3 deletions
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12
test/Transforms/MemCpyOpt/form-memset.ll
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@@ -177,6 +177,18 @@ entry:
; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
}
define void @test4(i32* nocapture %P) nounwind ssp {
entry:
store i32 0, i32* %P, align 4
%add.ptr = getelementptr inbounds i32* %P, i64 1
%0 = bitcast i32* %add.ptr to i8*
tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
ret void
; CHECK: @test4
; CHECK-NOT: store
; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind