| ; 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: llvm-as < %s | opt -gvn -instcombine | llvm-dis | 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 |
| } |
| |
