| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 1 | ; This test checks to make sure that 'br X, Dest, Dest' is folded into |
| 2 | ; 'br Dest'. This can only happen after the 'Z' block is eliminated. This is |
| 3 | ; due to the fact that the SimplifyCFG function does not use |
| 4 | ; the ConstantFoldTerminator function. |
| 5 | |
| Tanya Lattner | 003eae5 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 6 | ; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | \ |
| Dan Gohman | 3c25077 | 2008-05-01 23:50:07 +0000 | [diff] [blame] | 7 | ; RUN: not grep {br i1 %c2} |
| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 8 | |
| Tanya Lattner | 003eae5 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 9 | declare void @noop() |
| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 10 | |
| Tanya Lattner | 003eae5 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 11 | define i32 @test(i1 %c1, i1 %c2) { |
| 12 | call void @noop( ) |
| 13 | br i1 %c1, label %A, label %Y |
| 14 | A: ; preds = %0 |
| 15 | call void @noop( ) |
| 16 | br i1 %c2, label %Z, label %X |
| 17 | Z: ; preds = %A |
| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 18 | br label %X |
| Tanya Lattner | 003eae5 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 19 | X: ; preds = %Y, %Z, %A |
| 20 | call void @noop( ) |
| 21 | ret i32 0 |
| 22 | Y: ; preds = %0 |
| 23 | call void @noop( ) |
| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 24 | br label %X |
| 25 | } |
| Tanya Lattner | 003eae5 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 26 | |