llvm-project/llvm/test/Analysis/BasicAA/2003-04-22-GEPProblem.ll

15 lines
397 B
LLVM

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