| Brendon Cahoon | bece8ed | 2015-05-08 20:18:21 +0000 | [diff] [blame] | 1 | ; RUN: llc -march=hexagon -hexagon-hwloop-preheader < %s | FileCheck %s |
| 2 | |
| 3 | ; Generate hardware loops when we also need to add a new preheader. |
| 4 | ; we should generate two hardware loops for this test case. |
| 5 | |
| 6 | ; CHECK: loop0 |
| 7 | ; CHECK: endloop0 |
| 8 | ; CHECK: loop0 |
| 9 | ; CHECK: endloop0 |
| 10 | |
| 11 | @g = external global i32 |
| 12 | |
| 13 | define void @test(i32* nocapture %a, i32* nocapture %b, i32 %n) nounwind { |
| 14 | entry: |
| 15 | %tobool = icmp eq i32 %n, 0 |
| 16 | br i1 %tobool, label %for.body4.preheader, label %for.body.preheader |
| 17 | |
| 18 | for.body.preheader: |
| 19 | br label %for.body |
| 20 | |
| 21 | for.body: |
| 22 | %arrayidx.phi = phi i32* [ %arrayidx.inc, %for.body ], [ %a, %for.body.preheader ] |
| 23 | %i.014 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ] |
| 24 | %0 = load i32, i32* @g, align 4 |
| 25 | store i32 %0, i32* %arrayidx.phi, align 4 |
| 26 | %inc = add nsw i32 %i.014, 1 |
| 27 | %exitcond15 = icmp eq i32 %inc, 3 |
| 28 | %arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1 |
| 29 | br i1 %exitcond15, label %for.body4.preheader.loopexit, label %for.body |
| 30 | |
| 31 | for.body4.preheader.loopexit: |
| 32 | br label %for.body4.preheader |
| 33 | |
| 34 | for.body4.preheader: |
| 35 | br label %for.body4 |
| 36 | |
| 37 | for.body4: |
| 38 | %arrayidx5.phi = phi i32* [ %arrayidx5.inc, %for.body4 ], [ %b, %for.body4.preheader ] |
| 39 | %i1.013 = phi i32 [ %inc7, %for.body4 ], [ 0, %for.body4.preheader ] |
| 40 | %1 = load i32, i32* @g, align 4 |
| 41 | store i32 %1, i32* %arrayidx5.phi, align 4 |
| 42 | %inc7 = add nsw i32 %i1.013, 1 |
| 43 | %exitcond = icmp eq i32 %inc7, 3 |
| 44 | %arrayidx5.inc = getelementptr i32, i32* %arrayidx5.phi, i32 1 |
| 45 | br i1 %exitcond, label %for.end8, label %for.body4 |
| 46 | |
| 47 | for.end8: |
| 48 | ret void |
| 49 | } |