| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -jump-threading -verify -o - %s | FileCheck %s |
| 2 | @a = external global i16, align 1 |
| 3 | |
| 4 | ; CHECK-LABEL: f |
| 5 | ; CHECK: bb6: |
| 6 | ; CHECK: bb2: |
| 7 | ; CHECK: bb3: |
| 8 | ; CHECK-NOT: bb0: |
| 9 | ; CHECK-NOT: bb1: |
| 10 | ; CHECK-NOT: bb4: |
| 11 | ; CHECK-NOT: bb5: |
| 12 | define void @f(i32 %p1) { |
| 13 | bb0: |
| 14 | %0 = icmp eq i32 %p1, 0 |
| 15 | br i1 undef, label %bb6, label %bb1 |
| 16 | |
| 17 | bb1: |
| 18 | br label %bb2 |
| 19 | |
| 20 | bb2: |
| 21 | %1 = phi i1 [ %0, %bb1 ], [ %2, %bb4 ] |
| 22 | %2 = and i1 %1, undef |
| 23 | br i1 %2, label %bb3, label %bb4 |
| 24 | |
| 25 | bb3: |
| 26 | store i16 undef, i16* @a, align 1 |
| 27 | br label %bb4 |
| 28 | |
| 29 | bb4: |
| 30 | br i1 %0, label %bb2, label %bb5 |
| 31 | |
| 32 | bb5: |
| 33 | unreachable |
| 34 | |
| 35 | bb6: |
| 36 | ret void |
| 37 | } |