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