19 lines
572 B
LLVM
19 lines
572 B
LLVM
|
; 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
|
||
|
|
}
|
||
|
|
|