| ; RUN: opt < %s -ipsccp -S | FileCheck %s |
| |
| ; This transformation is safe for atomic loads and stores; check that it works. |
| |
| @G = internal global i32 17 |
| @C = internal constant i32 222 |
| |
| define i32 @test1() { |
| %V = load atomic i32* @G seq_cst, align 4 |
| %C = icmp eq i32 %V, 17 |
| br i1 %C, label %T, label %F |
| T: |
| store atomic i32 17, i32* @G seq_cst, align 4 |
| ret i32 %V |
| F: |
| store atomic i32 123, i32* @G seq_cst, align 4 |
| ret i32 0 |
| } |
| ; CHECK: define i32 @test1 |
| ; CHECK-NOT: store |
| ; CHECK: ret i32 17 |
| |
| define i32 @test2() { |
| %V = load atomic i32* @C seq_cst, align 4 |
| ret i32 %V |
| } |
| |
| ; CHECK: define i32 @test2 |
| ; CHECK-NOT: load |
| ; CHECK: ret i32 222 |
