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1; REQUIRES: asserts2; RUN: opt -passes=loop-vectorize -pass-remarks-analysis=loop-vectorize -debug-only=loop-vectorize -S < %s 2>&1 | FileCheck %s3 4; Make sure the unsafe user specified vectorization factor is clamped.5 6target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"7 8; void foo(int *a, int *b) {9; #pragma clang loop vectorize(enable) vectorize_width(4)10; for (int i=0; i < 1024; ++i) {11; a[i + 2] = a[i] + b[i];12; }13; }14 15; CHECK: LV: User VF=4 is unsafe, clamping to max safe VF=2.16; CHECK: remark: <unknown>:0:0: User-specified vectorization factor 4 is unsafe, clamping to maximum safe vectorization factor 217; CHECK: remark: <unknown>:0:0: UserVF ignored because it may be larger than the maximal safe VF18; CHECK-LABEL: @foo19; CHECK: <2 x i32>20define void @foo(ptr %a, ptr %b) {21entry:22 br label %loop.ph23 24loop.ph:25 br label %loop26 27loop:28 %iv = phi i64 [ 0, %loop.ph ], [ %iv.next, %loop ]29 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %iv30 %0 = load i32, ptr %arrayidx, align 431 %arrayidx2 = getelementptr inbounds i32, ptr %b, i64 %iv32 %1 = load i32, ptr %arrayidx2, align 433 %add = add nsw i32 %1, %034 %2 = add nuw nsw i64 %iv, 235 %arrayidx5 = getelementptr inbounds i32, ptr %a, i64 %236 store i32 %add, ptr %arrayidx5, align 437 %iv.next = add nuw nsw i64 %iv, 138 %exitcond.not = icmp eq i64 %iv.next, 102439 br i1 %exitcond.not, label %exit, label %loop, !llvm.loop !040 41exit:42 ret void43}44 45!0 = !{!0, !1, !2}46!1 = !{!"llvm.loop.vectorize.width", i32 4}47!2 = !{!"llvm.loop.vectorize.enable", i1 true}48