llvm-6502/test/Analysis/BasicAA/2003-04-22-GEPProblem.ll
Dan Gohman c1be92f3bb Make BasicAliasAnalysis a normal AliasAnalysis implementation which
does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18 18:04:47 +00:00

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343 B
LLVM

; RUN: opt < %s -basicaa -gvn -instcombine -S | grep sub
; BasicAA was incorrectly concluding that P1 and P2 didn't conflict!
define i32 @test(i32 *%Ptr, i64 %V) {
%P2 = getelementptr i32* %Ptr, i64 1
%P1 = getelementptr i32* %Ptr, i64 %V
%X = load i32* %P1
store i32 5, i32* %P2
%Y = load i32* %P1
%Z = sub i32 %X, %Y
ret i32 %Z
}