1 ; RUN: opt -passes=loop-distribute,loop-vectorize -enable-loop-distribute -force-vector-width=4 \
2 ; RUN: -verify-loop-info -verify-dom-info -S < %s | FileCheck %s
4 ; If only A and B can alias here, we don't need memchecks to distribute since
5 ; A and B are in the same partition. This used to cause a crash in the
8 ; for (i = 0; i < n; i++) {
9 ; A[i + 1] = A[i] * B[i];
10 ; ------------------------------
14 define void @f(ptr %a, ptr %b, ptr noalias %c, ptr noalias %d, ptr noalias %e) {
16 ; CHECK-NOT: memcheck:
17 ; CHECK: mul <4 x i32>
21 for.body: ; preds = %for.body, %entry
22 %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
24 %arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind
25 %loadA = load i32, ptr %arrayidxA, align 4
27 %arrayidxB = getelementptr inbounds i32, ptr %b, i64 %ind
28 %loadB = load i32, ptr %arrayidxB, align 4
30 %mulA = mul i32 %loadB, %loadA
32 %add = add nuw nsw i64 %ind, 1
33 %arrayidxA_plus_4 = getelementptr inbounds i32, ptr %a, i64 %add
34 store i32 %mulA, ptr %arrayidxA_plus_4, align 4
36 %arrayidxD = getelementptr inbounds i32, ptr %d, i64 %ind
37 %loadD = load i32, ptr %arrayidxD, align 4
39 %arrayidxE = getelementptr inbounds i32, ptr %e, i64 %ind
40 %loadE = load i32, ptr %arrayidxE, align 4
42 %mulC = mul i32 %loadD, %loadE
44 %arrayidxC = getelementptr inbounds i32, ptr %c, i64 %ind
45 store i32 %mulC, ptr %arrayidxC, align 4
47 %exitcond = icmp eq i64 %add, 20
48 br i1 %exitcond, label %for.end, label %for.body
50 for.end: ; preds = %for.body