2 ; RUN: opt -loop-vectorize -mtriple=arm64-apple-iphoneos -pass-remarks-analysis=loop-vectorize -debug-only=loop-vectorize -S < %s 2>&1 | FileCheck %s
4 ; Specify a large unsafe vectorization factor of 32 that gets clamped to 16,
5 ; then test an even smaller VF of 2 is selected based on the cost-model.
7 ; CHECK: LV: User VF=32 is unsafe, clamping to max safe VF=16.
8 ; CHECK: remark: <unknown>:0:0: User-specified vectorization factor 32 is unsafe, clamping to maximum safe vectorization factor 16
9 ; CHECK: LV: Selecting VF: 2.
12 define void @test(i64* nocapture %a, i64* nocapture readonly %b) {
17 %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
18 %arrayidx = getelementptr inbounds i64, i64* %a, i64 %iv
19 %0 = load i64, i64* %arrayidx, align 4
20 %arrayidx2 = getelementptr inbounds i64, i64* %b, i64 %iv
21 %1 = load i64, i64* %arrayidx2, align 4
22 %add = add nsw i64 %1, %0
23 %2 = add nuw nsw i64 %iv, 16
24 %arrayidx5 = getelementptr inbounds i64, i64* %a, i64 %2
25 %c = icmp eq i64 %1, 120
26 br i1 %c, label %then, label %latch
29 store i64 %add, i64* %arrayidx5, align 4
33 %iv.next = add nuw nsw i64 %iv, 1
34 %exitcond.not = icmp eq i64 %iv.next, 1024
35 br i1 %exitcond.not, label %exit, label %loop.header, !llvm.loop !0
42 !1 = !{!"llvm.loop.vectorize.width", i64 32}
43 !2 = !{!"llvm.loop.vectorize.enable", i1 true}