| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: llc -mtriple=armv8-eabi -verify-machineinstrs %s -o /dev/null |
| 2 | |
| 3 | ; This test ensures that Loop Strength Reduction will |
| 4 | ; not create an Add Reccurence Expression if not all |
| 5 | ; its operands are loop invariants. |
| 6 | |
| 7 | define void @add_rec_expr() { |
| 8 | entry: |
| 9 | br label %loop0 |
| 10 | |
| 11 | loop0: |
| 12 | %c.0 = phi i32 [ 0, %entry ], [ %inc.0, %loop0 ] |
| 13 | %inc.0 = add nuw i32 %c.0, 1 |
| 14 | br i1 undef, label %loop0, label %bb1 |
| 15 | |
| 16 | bb1: |
| 17 | %mul.0 = mul i32 %c.0, %c.0 |
| 18 | %gelptr.0 = getelementptr inbounds i16, i16* undef, i32 %mul.0 |
| 19 | br label %loop1 |
| 20 | |
| 21 | loop1: |
| 22 | %inc.1 = phi i32 [ %inc.2, %bb4 ], [ 0, %bb1 ] |
| 23 | %mul.1 = mul i32 %inc.1, %c.0 |
| 24 | br label %bb3 |
| 25 | |
| 26 | bb3: |
| 27 | %add.0 = add i32 undef, %mul.1 |
| 28 | %gelptr.1 = getelementptr inbounds i16, i16* %gelptr.0, i32 %add.0 |
| 29 | store i16 undef, i16* %gelptr.1, align 2 |
| 30 | br label %bb4 |
| 31 | |
| 32 | bb4: |
| 33 | %inc.2 = add nuw i32 %inc.1, 1 |
| 34 | br label %loop1 |
| 35 | } |