1 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
3 ; RUN: opt < %s -S -loop-vectorize -debug-only=loop-vectorize 2>&1 | FileCheck %s
5 ; CHECK: LV: Can't vectorize due to memory conflicts
7 define void @test_loop_novect(double** %arr, i64 %n) {
9 %t = load double*, double** %arr, align 8
12 for.body: ; preds = %for.body, %for.body.lr.ph
13 %i = phi i64 [ 0, %for.body.lr.ph ], [ %i.next, %for.body ]
14 %a = getelementptr inbounds double, double* %t, i64 %i
15 %i.next = add nuw nsw i64 %i, 1
16 %a.next = getelementptr inbounds double, double* %t, i64 %i.next
17 %t1 = load double, double* %a, align 8
18 %t2 = load double, double* %a.next, align 8
19 store double %t1, double* %a.next, align 8
20 store double %t2, double* %a, align 8
21 %c = icmp eq i64 %i, %n
22 br i1 %c, label %final, label %for.body
24 final: ; preds = %for.body