| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame^] | 1 | ; RUN: opt -basicaa -loop-versioning -S < %s | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| 4 | |
| 5 | ; Version this loop with overlap checks between a, c and b, c. |
| 6 | |
| 7 | define void @f(i32* %a, i32* %b, i32* %c) { |
| 8 | entry: |
| 9 | br label %for.body |
| 10 | |
| 11 | ; CHECK: for.body.lver.check: |
| 12 | ; CHECK: icmp |
| 13 | ; CHECK: icmp |
| 14 | ; CHECK: icmp |
| 15 | ; CHECK: icmp |
| 16 | ; CHECK-NOT: icmp |
| 17 | ; CHECK: br i1 %memcheck.conflict, label %for.body.ph.lver.orig, label %for.body.ph |
| 18 | |
| 19 | ; CHECK: for.body.ph.lver.orig: |
| 20 | ; CHECK: for.body.lver.orig: |
| 21 | ; CHECK: br i1 %exitcond.lver.orig, label %for.end, label %for.body.lver.orig |
| 22 | ; CHECK: for.body.ph: |
| 23 | ; CHECK: for.body: |
| 24 | ; CHECK: br i1 %exitcond, label %for.end, label %for.body |
| 25 | ; CHECK: for.end: |
| 26 | |
| 27 | for.body: ; preds = %for.body, %entry |
| 28 | %ind = phi i64 [ 0, %entry ], [ %add, %for.body ] |
| 29 | |
| 30 | %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind |
| 31 | %loadA = load i32, i32* %arrayidxA, align 4 |
| 32 | |
| 33 | %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind |
| 34 | %loadB = load i32, i32* %arrayidxB, align 4 |
| 35 | |
| 36 | %mulC = mul i32 %loadA, %loadB |
| 37 | |
| 38 | %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind |
| 39 | store i32 %mulC, i32* %arrayidxC, align 4 |
| 40 | |
| 41 | %add = add nuw nsw i64 %ind, 1 |
| 42 | %exitcond = icmp eq i64 %add, 20 |
| 43 | br i1 %exitcond, label %for.end, label %for.body |
| 44 | |
| 45 | for.end: ; preds = %for.body |
| 46 | ret void |
| 47 | } |