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new testcase that DS-AA is causing to be miscompiled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20813 91177308-0d34-0410-b5e6-96231b3b80d8
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test/Analysis/DSGraph/2005-03-24-Global-Arg-Alias.ll
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test/Analysis/DSGraph/2005-03-24-Global-Arg-Alias.ll
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; RUN: llvm-as < %s | opt -ds-aa -load-vn -gcse | llvm-dis | grep 'load int* %L'
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%G = internal global int* null
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int %caller(bool %P) {
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%L = alloca int
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call void %callee(bool %P, int* %L)
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;; At this point, G could point to L, so we can't eliminate these operations.
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%GP = load int** %G
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store int 17, int* %L
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store int 18, int* %GP ;; might clober L
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%A = load int* %L ;; is not necessarily 17!
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ret int %A
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}
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internal void %callee(bool %Cond, int* %P) {
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br bool %Cond, label %T, label %F
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T:
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store int* %P, int** %G
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ret void
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F:
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ret void
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}
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