| ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-unknown-linux -S -mcpu=slm -debug 2>&1 | FileCheck -check-prefix=MSG %s |
| ; REQUIRES: asserts |
| ; This test should not be vectorized in X86\SLM arch |
| ; Vectorizing the 64bit multiply in this case is wrong since |
| ; it can be done with a lower bit mode (notice that the sources is 16bit) |
| ; Also addq\subq (quad word) has a high cost on SLM arch. |
| ; this test has a bad performance (regression of -70%) if vectorized on SLM arch |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define i32 @no_vec(i32 %LastIndex, i16* nocapture readonly %InputData, i16 signext %lag, i16 signext %Scale) { |
| entry: |
| ; MSG: LV: Selecting VF: 1. |
| %cmp17 = icmp sgt i32 %LastIndex, 0 |
| br i1 %cmp17, label %for.body.lr.ph, label %for.cond.cleanup |
| |
| for.body.lr.ph: ; preds = %entry |
| %conv5 = sext i16 %Scale to i64 |
| %sh_prom = and i64 %conv5, 4294967295 |
| %0 = sext i16 %lag to i64 |
| %wide.trip.count = zext i32 %LastIndex to i64 |
| br label %for.body |
| |
| for.cond.cleanup.loopexit: ; preds = %for.body |
| %conv8 = trunc i64 %add7 to i32 |
| br label %for.cond.cleanup |
| |
| for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry |
| %Accumulator.0.lcssa = phi i32 [ 0, %entry ], [ %conv8, %for.cond.cleanup.loopexit ] |
| ret i32 %Accumulator.0.lcssa |
| |
| for.body: ; preds = %for.body, %for.body.lr.ph |
| %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] |
| %Accumulator.018 = phi i64 [ 0, %for.body.lr.ph ], [ %add7, %for.body ] |
| %arrayidx = getelementptr inbounds i16, i16* %InputData, i64 %indvars.iv |
| %1 = load i16, i16* %arrayidx, align 2 |
| %conv = sext i16 %1 to i64 |
| %2 = add nsw i64 %indvars.iv, %0 |
| %arrayidx3 = getelementptr inbounds i16, i16* %InputData, i64 %2 |
| %3 = load i16, i16* %arrayidx3, align 2 |
| %conv4 = sext i16 %3 to i64 |
| %mul = mul nsw i64 %conv4, %conv |
| %shr = ashr i64 %mul, %sh_prom |
| %add7 = add i64 %shr, %Accumulator.018 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count |
| br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body |
| } |
| |