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 10 ; CHECK-LABEL: @f( 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} 55
