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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; RUN: opt < %s -S -passes=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(ptr %arr, i64 %n) {
for.body.lr.ph:
%t = load ptr, ptr %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, ptr %t, i64 %i
%i.next = add nuw nsw i64 %i, 1
%a.next = getelementptr inbounds double, ptr %t, i64 %i.next
%t1 = load double, ptr %a, align 8
%t2 = load double, ptr %a.next, align 8
store double %t1, ptr %a.next, align 8
store double %t2, ptr %a, align 8
%c = icmp eq i64 %i, %n
br i1 %c, label %final, label %for.body
final: ; preds = %for.body
ret void
}
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