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1; RUN: opt -passes=loop-versioning -S < %s | FileCheck %s2 3; A very simple case. After versioning the %loadA and %loadB can't alias with4; the store.5;6; To see it easier what's going on, I expanded every noalias/scope metadata7; 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 12target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"13 14define void @f(ptr %a, ptr %b, ptr %c) {15entry:16 br label %for.body17 18; CHECK: for.body.lver.orig:19; CHECK: for.body:20for.body: ; preds = %for.body, %entry21 %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]22 23 %arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind24; CHECK: %loadA = {{.*}} !alias.scope !025; A's scope: !0 -> { 1(2) }26 %loadA = load i32, ptr %arrayidxA, align 427 28 %arrayidxB = getelementptr inbounds i32, ptr %b, i64 %ind29; CHECK: %loadB = {{.*}} !alias.scope !330; B's scope: !3 -> { 4(2) }31 %loadB = load i32, ptr %arrayidxB, align 432 33 %mulC = mul i32 %loadA, %loadB34 35 %arrayidxC = getelementptr inbounds i32, ptr %c, i64 %ind36; CHECK: store {{.*}} !alias.scope !5, !noalias !737; C noalias A and B: !7 -> { 1(2), 4(2) }38 store i32 %mulC, ptr %arrayidxC, align 439 40 %add = add nuw nsw i64 %ind, 141 %exitcond = icmp eq i64 %add, 2042 br i1 %exitcond, label %for.end, label %for.body43 44for.end: ; preds = %for.body45 ret void46}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