| Florian Hahn | 2e03213 | 2016-12-19 17:13:37 +0000 | [diff] [blame] | 1 | ; This test ensures loop versioning does not produce an invalid dominator tree |
| 2 | ; if the exit block of the loop (bb0) dominates the runtime check block |
| 3 | ; (bb1 will become the runtime check block). |
| 4 | |
| Adam Nemet | 32e6a34 | 2016-12-21 04:07:40 +0000 | [diff] [blame] | 5 | ; RUN: opt -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t |
| 6 | ; RUN: opt -loop-simplify -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t |
| Florian Hahn | 2e03213 | 2016-12-19 17:13:37 +0000 | [diff] [blame] | 7 | ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s |
| 8 | |
| 9 | ; RUN: opt -loop-versioning -verify-dom-info -S -o - %s > %t |
| 10 | ; RUN: opt -loop-simplify -loop-versioning -verify-dom-info -S -o - %s > %t |
| 11 | ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s |
| 12 | |
| 13 | @c1 = external global i16 |
| 14 | |
| 15 | define void @f(i16 %a) { |
| 16 | br label %bb0 |
| 17 | |
| 18 | bb0: |
| 19 | br label %bb1 |
| 20 | |
| 21 | bb1: |
| 22 | %tmp1 = load i16, i16* @c1 |
| 23 | br label %bb2 |
| 24 | |
| 25 | bb2: |
| 26 | %tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ] |
| 27 | %tmp4 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 4 |
| 28 | store i32 1, i32* %tmp4 |
| 29 | %tmp5 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 9 |
| 30 | store i32 0, i32* %tmp5 |
| 31 | %tmp3 = add i16 %tmp2, 1 |
| 32 | store i16 %tmp2, i16* @c1 |
| 33 | %tmp6 = icmp sle i16 %tmp3, 0 |
| 34 | br i1 %tmp6, label %bb2, label %bb0 |
| 35 | } |
| 36 | |
| 37 | ; Simple check to make sure loop versioning happened. |
| 38 | ; CHECK-VERSIONING: bb2.lver.check: |