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new testcase that DS-AA is causing to be miscompiled.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20813 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-03-24 17:57:43 +00:00
parent 1bcb9abb30
commit 4e59c642c8
1 changed files with 26 additions and 0 deletions
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26
test/Analysis/DSGraph/2005-03-24-Global-Arg-Alias.ll Normal file
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; RUN: llvm-as < %s | opt -ds-aa -load-vn -gcse | llvm-dis | grep 'load int* %L'
%G = internal global int* null
int %caller(bool %P) {
%L = alloca int
call void %callee(bool %P, int* %L)
;; At this point, G could point to L, so we can't eliminate these operations.
%GP = load int** %G
store int 17, int* %L
store int 18, int* %GP ;; might clober L
%A = load int* %L ;; is not necessarily 17!
ret int %A
}
internal void %callee(bool %Cond, int* %P) {
br bool %Cond, label %T, label %F
T:
store int* %P, int** %G
ret void
F:
ret void
}