| ; 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 -aa-pipeline=basic-aa -passes=gvn,instcombine -S | FileCheck %s |
| |
| define i32 @test() { |
| ; CHECK: %Y.DONOTREMOVE = load i32, ptr %A |
| ; CHECK: %Z = sub i32 0, %Y.DONOTREMOVE |
| %A = alloca i32 |
| store i32 0, ptr %A |
| %X = load i32, ptr %A |
| %C = getelementptr i8, ptr %A, i64 1 |
| store i8 1, ptr %C ; Aliases %A |
| %Y.DONOTREMOVE = load i32, ptr %A |
| %Z = sub i32 %X, %Y.DONOTREMOVE |
| ret i32 %Z |
| } |
| |
