| Duncan P. N. Exon Smith | c46cfcb | 2014-10-07 21:19:00 +0000 | [diff] [blame^] | 1 | ; RUN: opt -S < %s -loop-unroll -block-freq | FileCheck %s |
| 2 | ; Crasher from PR20987. |
| 3 | |
| 4 | ; CHECK: define void @update_loop_info_in_subloops |
| 5 | ; CHECK: entry: |
| 6 | ; CHECK: L: |
| 7 | ; CHECK: L.inner: |
| 8 | ; CHECK: L.inner.latch: |
| 9 | ; CHECK: L.latch: |
| 10 | ; CHECK: L.inner.1: |
| 11 | ; CHECK: L.inner.latch.1: |
| 12 | ; CHECK: L.latch.1: |
| 13 | |
| 14 | define void @update_loop_info_in_subloops() { |
| 15 | entry: |
| 16 | br label %L |
| 17 | |
| 18 | L: |
| 19 | %0 = phi i64 [ 1, %entry ], [ %1, %L.latch ] |
| 20 | br label %L.inner |
| 21 | |
| 22 | L.inner: |
| 23 | br label %L.inner.latch |
| 24 | |
| 25 | L.inner.latch: |
| 26 | br i1 false, label %L.latch, label %L.inner |
| 27 | |
| 28 | L.latch: |
| 29 | %1 = add i64 %0, 1 |
| 30 | %2 = icmp eq i64 %1, 3 |
| 31 | br i1 %2, label %exit, label %L |
| 32 | |
| 33 | exit: |
| 34 | ret void |
| 35 | } |