slm-no-vectorize.ll
2.21 KB
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; 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
}