llvm-project/llvm/test/Transforms/InstCombine/2004-09-20-BadLoadCombine.ll

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; RUN: opt < %s -instcombine -mem2reg -S | \
; RUN: not grep {i32 1}
; When propagating the load through the select, make sure that the load is
; inserted where the original load was, not where the select is. Not doing
; so could produce incorrect results!
define i32 @test(i1 %C) {
%X = alloca i32 ; <i32*> [#uses=3]
%X2 = alloca i32 ; <i32*> [#uses=2]
store i32 1, i32* %X
store i32 2, i32* %X2
%Y = select i1 %C, i32* %X, i32* %X2 ; <i32*> [#uses=1]
store i32 3, i32* %X
%Z = load i32* %Y ; <i32> [#uses=1]
ret i32 %Z
}