| Tobias Grosser | 6b31b15 | 2017-03-06 15:20:38 +0000 | [diff] [blame^] | 1 | ; REQUIRES: asserts |
| 2 | ; RUN: opt -regions -analyze < %s | FileCheck %s |
| 3 | ; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s |
| 4 | |
| 5 | ; While working on improvements to region info analysis, this test |
| 6 | ; case caused an incorrect region bb2 => bb3 to be detected. |
| 7 | |
| 8 | define internal i8 @main_read() nounwind { |
| 9 | bb: |
| 10 | br label %bb1 |
| 11 | |
| 12 | bb1: |
| 13 | br i1 true, label %bb2, label %bb7 |
| 14 | |
| 15 | bb2: |
| 16 | br i1 true, label %bb4, label %bb3 |
| 17 | |
| 18 | bb3: |
| 19 | br i1 true, label %bb4, label %bb8 |
| 20 | |
| 21 | bb4: |
| 22 | br label %bb5 |
| 23 | |
| 24 | bb5: |
| 25 | br label %bb6 |
| 26 | |
| 27 | bb6: |
| 28 | br label %bb1 |
| 29 | |
| 30 | bb7: |
| 31 | br label %bb5 |
| 32 | |
| 33 | bb8: |
| 34 | ret i8 1 |
| 35 | } |
| 36 | |
| 37 | ; CHECK: [0] bb => <Function Return> |
| 38 | ; CHECK-NEXT: [1] bb1 => bb8 |
| 39 | ; CHECK-NEXT: End Region tree |