| Chandler Carruth | 1353f9a | 2017-04-27 18:45:20 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -S -simple-loop-unswitch -verify-loop-info -verify-dom-info | FileCheck %s |
| 2 | ; PR12343: -simple-loop-unswitch crash on indirect branch |
| 3 | |
| 4 | ; CHECK: %0 = icmp eq i64 undef, 0 |
| 5 | ; CHECK-NEXT: br i1 %0, label %"5", label %"4" |
| 6 | |
| 7 | ; CHECK: "5": ; preds = %entry |
| 8 | ; CHECK-NEXT: br label %"16" |
| 9 | |
| 10 | ; CHECK: "16": ; preds = %"22", %"5" |
| 11 | ; CHECK-NEXT: indirectbr i8* undef, [label %"22", label %"33"] |
| 12 | |
| 13 | ; CHECK: "22": ; preds = %"16" |
| 14 | ; CHECK-NEXT: br i1 %0, label %"16", label %"26" |
| 15 | |
| 16 | ; CHECK: "26": ; preds = %"22" |
| 17 | ; CHECK-NEXT: unreachable |
| 18 | |
| 19 | define void @foo() { |
| 20 | entry: |
| 21 | %0 = icmp eq i64 undef, 0 |
| 22 | br i1 %0, label %"5", label %"4" |
| 23 | |
| 24 | "4": ; preds = %entry |
| 25 | unreachable |
| 26 | |
| 27 | "5": ; preds = %entry |
| 28 | br label %"16" |
| 29 | |
| 30 | "16": ; preds = %"22", %"5" |
| 31 | indirectbr i8* undef, [label %"22", label %"33"] |
| 32 | |
| 33 | "22": ; preds = %"16" |
| 34 | br i1 %0, label %"16", label %"26" |
| 35 | |
| 36 | "26": ; preds = %"22" |
| 37 | unreachable |
| 38 | |
| 39 | "33": ; preds = %"16" |
| 40 | unreachable |
| 41 | } |