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; REQUIRES: asserts
; RUN: opt < %s -passes=loop-vectorize -mtriple riscv64 -riscv-v-vector-bits-min=128 -mattr="+v" -debug-only=loop-vectorize -S 2>&1 | FileCheck %s
; CHECK: LV: Loop hints: force=enabled
; CHECK: LV: Scalar loop costs: 4.
; ChosenFactor.Cost is 4, but the real cost will be divided by the width, which is 2.
; CHECK: LV: Vector loop of width 2 costs: 2.
; Regardless of force vectorization or not, this loop will eventually be vectorized because of the cost model.
; Therefore, the following message does not need to be printed even if vectorization is explicitly forced in the metadata.
; CHECK-NOT: LV: Vectorization seems to be not beneficial, but was forced by a user.
target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
target triple = "riscv64-unknown-unknown"
define i64 @foo(ptr nocapture noundef readonly %a, i64 noundef %N, i64 noundef %init) {
entry:
br label %for.body
for.body: ; preds = %entry, %for.body
%i.06 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
%rd.05 = phi i64 [ %add, %for.body ], [ %init, %entry ]
%arrayidx = getelementptr inbounds i64, ptr %a, i64 %i.06
%0 = load i64, ptr %arrayidx, align 8
%add = add nsw i64 %0, %rd.05
%inc = add nuw i64 %i.06, 1
%exitcond.not = icmp eq i64 %inc, %N
br i1 %exitcond.not, label %for.end, label %for.body, !llvm.loop !0
for.end: ; preds = %for.body
ret i64 %add
}
!0 = !{!0, !1}
!1 = !{!"llvm.loop.vectorize.enable", i1 true}
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