| Adam Nemet | 5eccf07 | 2016-03-17 20:32:32 +0000 | [diff] [blame] | 1 | ; RUN: opt -basicaa -loop-versioning -S < %s | FileCheck %s |
| 2 | |
| 3 | ; A very simple case. After versioning the %loadA and %loadB can't alias with |
| 4 | ; the store. |
| 5 | ; |
| 6 | ; To see it easier what's going on, I expanded every noalias/scope metadata |
| 7 | ; reference below in a comment. For a scope I use the format scope(domain), |
| 8 | ; e.g. scope 17 in domain 15 is written as 17(15). |
| 9 | |
| Adam Nemet | 64fa753 | 2016-03-28 21:04:13 +0000 | [diff] [blame] | 10 | ; CHECK-LABEL: @f( |
| Adam Nemet | 5eccf07 | 2016-03-17 20:32:32 +0000 | [diff] [blame] | 11 | |
| 12 | target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| 13 | |
| 14 | define void @f(i32* %a, i32* %b, i32* %c) { |
| 15 | entry: |
| 16 | br label %for.body |
| 17 | |
| 18 | ; CHECK: for.body.lver.orig: |
| 19 | ; CHECK: for.body: |
| 20 | for.body: ; preds = %for.body, %entry |
| 21 | %ind = phi i64 [ 0, %entry ], [ %add, %for.body ] |
| 22 | |
| 23 | %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind |
| 24 | ; CHECK: %loadA = {{.*}} !alias.scope !0 |
| 25 | ; A's scope: !0 -> { 1(2) } |
| 26 | %loadA = load i32, i32* %arrayidxA, align 4 |
| 27 | |
| 28 | %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind |
| 29 | ; CHECK: %loadB = {{.*}} !alias.scope !3 |
| 30 | ; B's scope: !3 -> { 4(2) } |
| 31 | %loadB = load i32, i32* %arrayidxB, align 4 |
| 32 | |
| 33 | %mulC = mul i32 %loadA, %loadB |
| 34 | |
| 35 | %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind |
| 36 | ; CHECK: store {{.*}} !alias.scope !5, !noalias !7 |
| 37 | ; C noalias A and B: !7 -> { 1(2), 4(2) } |
| 38 | store i32 %mulC, i32* %arrayidxC, align 4 |
| 39 | |
| 40 | %add = add nuw nsw i64 %ind, 1 |
| 41 | %exitcond = icmp eq i64 %add, 20 |
| 42 | br i1 %exitcond, label %for.end, label %for.body |
| 43 | |
| 44 | for.end: ; preds = %for.body |
| 45 | ret void |
| 46 | } |
| 47 | ; CHECK: !0 = !{!1} |
| 48 | ; CHECK: !1 = distinct !{!1, !2} |
| 49 | ; CHECK: !2 = distinct !{!2, !"LVerDomain"} |
| 50 | ; CHECK: !3 = !{!4} |
| 51 | ; CHECK: !4 = distinct !{!4, !2} |
| 52 | ; CHECK: !5 = !{!6} |
| 53 | ; CHECK: !6 = distinct !{!6, !2} |
| 54 | ; CHECK: !7 = !{!1, !4} |