| ; 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: 7. |
| ; ChosenFactor.Cost is 8, but the real cost will be divided by the width, which is 4. |
| ; CHECK: LV: Vector loop of width 2 costs: 3. |
| ; 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} |
