| ; This test checks to make sure that 'br X, Dest, Dest' is folded into |
| ; 'br Dest'. This can only happen after the 'Z' block is eliminated. This is |
| ; due to the fact that the SimplifyCFG function does not use |
| ; the ConstantFoldTerminator function. |
| |
| ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| |
| ; CHECK-NOT: br i1 %c2 |
| |
| declare void @noop() |
| |
| define i32 @test(i1 %c1, i1 %c2) { |
| call void @noop( ) |
| br i1 %c1, label %A, label %Y |
| A: ; preds = %0 |
| call void @noop( ) |
| br i1 %c2, label %Z, label %X |
| Z: ; preds = %A |
| br label %X |
| X: ; preds = %Y, %Z, %A |
| call void @noop( ) |
| ret i32 0 |
| Y: ; preds = %0 |
| call void @noop( ) |
| br label %X |
| } |
| |