| ; REQUIRES: asserts | |
| ; RUN: opt -regions -analyze < %s | FileCheck %s | |
| ; While working on improvements to the region info analysis, this test | |
| ; case caused an incorrect region 3 => 8 to be detected. | |
| define internal i8 @wibble() { | |
| bb: | |
| br i1 true, label %bb1, label %bb8 | |
| bb1: ; preds = %bb | |
| switch i32 0, label %bb2 [ | |
| i32 0, label %bb3 | |
| i32 1, label %bb7 | |
| ] | |
| bb2: ; preds = %bb1 | |
| br label %bb4 | |
| bb3: ; preds = %bb1 | |
| br label %bb5 | |
| bb4: ; preds = %bb2 | |
| br label %bb6 | |
| bb5: ; preds = %bb3 | |
| br label %bb6 | |
| bb6: ; preds = %bb5, %bb4 | |
| br label %bb7 | |
| bb7: ; preds = %bb6, %bb1 | |
| br label %bb8 | |
| bb8: ; preds = %bb7, %bb | |
| ret i8 1 | |
| } | |
| ; CHECK: [0] bb => <Function Return> | |
| ; CHECK-NEXT: [1] bb => bb8 | |
| ; CHECK-NEXT: [2] bb1 => bb7 | |
| ; CHECK-NEXT: End region tree | |