; This testcase makes sure that size is taken to account when alias analysis | |
; is performed. It is not legal to delete the second load instruction because | |
; the value computed by the first load instruction is changed by the store. | |
; RUN: opt < %s -basicaa -gvn -instcombine -S | grep DONOTREMOVE | |
define i32 @test() { | |
%A = alloca i32 | |
store i32 0, i32* %A | |
%X = load i32* %A | |
%B = bitcast i32* %A to i8* | |
%C = getelementptr i8* %B, i64 1 | |
store i8 1, i8* %C ; Aliases %A | |
%Y.DONOTREMOVE = load i32* %A | |
%Z = sub i32 %X, %Y.DONOTREMOVE | |
ret i32 %Z | |
} | |