1 ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-unknown-linux -S -mcpu=slm -debug 2>&1 | FileCheck -check-prefix=MSG %s
3 ; This test should not be vectorized in X86\SLM arch
4 ; Vectorizing the 64bit multiply in this case is wrong since
5 ; it can be done with a lower bit mode (notice that the sources is 16bit)
6 ; Also addq\subq (quad word) has a high cost on SLM arch.
7 ; this test has a bad performance (regression of -70%) if vectorized on SLM arch
8 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
9 target triple = "x86_64-unknown-linux-gnu"
11 define i32 @no_vec(i32 %LastIndex, i16* nocapture readonly %InputData, i16 signext %lag, i16 signext %Scale) {
13 ; MSG: LV: Selecting VF: 1.
14 %cmp17 = icmp sgt i32 %LastIndex, 0
15 br i1 %cmp17, label %for.body.lr.ph, label %for.cond.cleanup
17 for.body.lr.ph: ; preds = %entry
18 %conv5 = sext i16 %Scale to i64
19 %sh_prom = and i64 %conv5, 4294967295
20 %0 = sext i16 %lag to i64
21 %wide.trip.count = zext i32 %LastIndex to i64
24 for.cond.cleanup.loopexit: ; preds = %for.body
25 %conv8 = trunc i64 %add7 to i32
26 br label %for.cond.cleanup
28 for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
29 %Accumulator.0.lcssa = phi i32 [ 0, %entry ], [ %conv8, %for.cond.cleanup.loopexit ]
30 ret i32 %Accumulator.0.lcssa
32 for.body: ; preds = %for.body, %for.body.lr.ph
33 %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
34 %Accumulator.018 = phi i64 [ 0, %for.body.lr.ph ], [ %add7, %for.body ]
35 %arrayidx = getelementptr inbounds i16, i16* %InputData, i64 %indvars.iv
36 %1 = load i16, i16* %arrayidx, align 2
37 %conv = sext i16 %1 to i64
38 %2 = add nsw i64 %indvars.iv, %0
39 %arrayidx3 = getelementptr inbounds i16, i16* %InputData, i64 %2
40 %3 = load i16, i16* %arrayidx3, align 2
41 %conv4 = sext i16 %3 to i64
42 %mul = mul nsw i64 %conv4, %conv
43 %shr = ashr i64 %mul, %sh_prom
44 %add7 = add i64 %shr, %Accumulator.018
45 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
46 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
47 br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body