forked from OSchip/llvm-project
60 lines
2.1 KiB
LLVM
60 lines
2.1 KiB
LLVM
; RUN: opt -mcpu=skx -S -loop-vectorize -force-vector-width=8 -force-vector-interleave=1 -enable-interleaved-mem-accesses < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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; This test checks the fix for PR39099.
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;
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; Check that the predicated load is not vectorized as an
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; interleaved-group (which requires proper masking, currently unsupported)
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; but rather as a scalarized accesses.
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; (For SKX, Gather is not supported by the compiler for chars, therefore
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; the only remaining alternative is to scalarize).
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;
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; void masked_strided(const unsigned char* restrict p,
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; unsigned char* restrict q,
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; unsigned char guard) {
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; for(ix=0; ix < 1024; ++ix) {
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; if (ix > guard) {
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; char t = p[2*ix];
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; q[ix] = t;
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; }
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; }
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; }
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;CHECK-LABEL: @masked_strided(
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;CHECK: vector.body:
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;CHECK-NEXT: %index = phi i32
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;CHECK-NEXT: %[[VECIND:.+]] = phi <8 x i32> [ <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
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;CHECK-NEXT: %[[VMASK:.+]] = icmp ugt <8 x i32> %[[VECIND]], %{{broadcast.splat*}}
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;CHECK-NEXT: %{{.*}} = shl nuw nsw <8 x i32> %[[VECIND]], <i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1>
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;CHECK-NEXT: %[[M:.+]] = extractelement <8 x i1> %[[VMASK]], i32 0
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;CHECK-NEXT: br i1 %[[M]], label %pred.load.if, label %pred.load.continue
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;CHECK-NOT: %{{.+}} = load <16 x i8>, <16 x i8>* %{{.*}}, align 1
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define dso_local void @masked_strided(i8* noalias nocapture readonly %p, i8* noalias nocapture %q, i8 zeroext %guard) local_unnamed_addr {
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entry:
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%conv = zext i8 %guard to i32
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br label %for.body
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for.body:
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%ix.09 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%cmp1 = icmp ugt i32 %ix.09, %conv
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br i1 %cmp1, label %if.then, label %for.inc
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if.then:
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%mul = shl nuw nsw i32 %ix.09, 1
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%arrayidx = getelementptr inbounds i8, i8* %p, i32 %mul
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%0 = load i8, i8* %arrayidx, align 1
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%arrayidx3 = getelementptr inbounds i8, i8* %q, i32 %ix.09
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store i8 %0, i8* %arrayidx3, align 1
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br label %for.inc
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for.inc:
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%inc = add nuw nsw i32 %ix.09, 1
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%exitcond = icmp eq i32 %inc, 1024
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret void
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}
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