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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8558 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
614 B
LLVM
19 lines
614 B
LLVM
; This testcase makes sure that size is taken to account when alias analysis
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; is performed. It is not legal to delete the second load instruction because
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; the value computed by the first load instruction is changed by the store.
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; RUN: llvm-as < %s | opt -load-vn -gcse -instcombine | llvm-dis | grep DONOTREMOVE
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int %test() {
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%A = alloca int
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store int 0, int* %A
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%X = load int* %A
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%B = cast int* %A to sbyte*
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%C = getelementptr sbyte* %B, long 1
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store sbyte 1, sbyte* %C ; Aliases %A
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%Y.DONOTREMOVE = load int* %A
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%Z = sub int %X, %Y.DONOTREMOVE
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ret int %Z
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}
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