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