| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-deletion -S | FileCheck %s |
| 2 | |
| 3 | ; Checking that possible users of instruction from the loop in |
| 4 | ; unreachable blocks are handled. |
| 5 | |
| 6 | define i64 @foo() { |
| 7 | entry: |
| 8 | br label %invloop |
| 9 | ; CHECK-LABEL-NOT: invloop |
| 10 | invloop: |
| 11 | %indvar1 = phi i64 [ 3, %entry ], [ %indvar2, %invloop_iter ] |
| 12 | %check = icmp ult i64 %indvar1, 400 |
| 13 | br i1 %check, label %invloop_iter, label %loopexit |
| 14 | invloop_iter: |
| 15 | %indvar2 = add i64 %indvar1, 1 |
| 16 | %baddef = add i64 0, 0 |
| 17 | br label %invloop |
| 18 | loopexit: |
| 19 | ret i64 0 |
| 20 | deadcode: |
| 21 | ; CHECK-LABEL: deadcode |
| 22 | ; CHECK: ret i64 undef |
| 23 | ret i64 %baddef |
| 24 | } |