| ; RUN: opt -S < %s -passes=jump-threading | FileCheck %s |
| |
| ; PR40992: Do not incorrectly fold %bb5 into an unconditional br to %bb7. |
| ; Also verify we correctly thread %bb1 -> %bb7 when %c is false. |
| |
| define i32 @jtbr(i1 %v1, i1 %v2, i1 %v3) { |
| ; CHECK: bb0: |
| bb0: |
| br label %bb1 |
| |
| ; CHECK: bb1: |
| ; CHECK-NEXT: and |
| ; CHECK-NEXT: br i1 %c, label %bb2, label %bb7 |
| bb1: |
| %c = and i1 %v1, %v2 |
| br i1 %c, label %bb2, label %bb5 |
| |
| ; CHECK: bb2: |
| ; CHECK-NEXT: select |
| ; CHECK-NEXT: indirectbr ptr %ba, [label %bb3, label %bb5] |
| bb2: |
| %ba = select i1 %v3, ptr blockaddress(@jtbr, %bb3), ptr blockaddress(@jtbr, %bb4) |
| indirectbr ptr %ba, [label %bb3, label %bb4] |
| |
| ; CHECK: bb3: |
| bb3: |
| br label %bb1 |
| |
| ; CHECK-NOT: bb4: |
| bb4: |
| br label %bb5 |
| |
| ; CHECK: bb5: |
| bb5: |
| br i1 %c, label %bb6, label %bb7 |
| |
| ; CHECK: bb6: |
| bb6: |
| ret i32 0 |
| |
| ; CHECK: bb7: |
| bb7: |
| ret i32 1 |
| } |
