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[X86] SimplifyDemandedVectorElts - add VPPERM support

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We need to add support for all variable shuffle mask ops, but VPPERM is the only one that already has test coverage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358165 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Simon Pilgrim
2019-04-11 13:30:38 +00:00
parent 3ee22de748
commit ec7786cfeb
2 changed files with 10 additions and 1 deletions
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lib/Target/X86/X86ISelLowering.cpp
+9
View File
@@ -33234,6 +33234,15 @@ bool X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode(
return true;
break;
}
case X86ISD::VPPERM: {
// TODO - simplify other variable shuffle masks.
SDValue Mask = Op.getOperand(2);
APInt MaskUndef, MaskZero;
if (SimplifyDemandedVectorElts(Mask, DemandedElts, MaskUndef, MaskZero, TLO,
Depth + 1))
return true;
break;
}
case X86ISD::HADD:
case X86ISD::HSUB:
case X86ISD::FHADD:
test/CodeGen/X86/oddshuffles.ll
+1 -1
View File
@@ -1241,7 +1241,7 @@ define void @interleave_24i16_in(<24 x i16>* %p, <8 x i16>* %q1, <8 x i16>* %q2,
; XOP-NEXT: vmovdqu (%rsi), %xmm0
; XOP-NEXT: vmovdqu (%rdx), %xmm1
; XOP-NEXT: vmovdqu (%rcx), %xmm2
; XOP-NEXT: vpperm {{.*#+}} xmm3 = xmm0[4,5,6,7],xmm1[6,7],xmm0[6,7,8,9],xmm1[8,9],xmm0[8,9,10,11]
; XOP-NEXT: vpperm {{.*#+}} xmm3 = xmm0[u,u,6,7],xmm1[6,7],xmm0[u,u,8,9],xmm1[8,9],xmm0[u,u,10,11]
; XOP-NEXT: vpshufd {{.*#+}} xmm4 = xmm2[1,1,2,2]
; XOP-NEXT: vpblendw {{.*#+}} xmm3 = xmm4[0],xmm3[1,2],xmm4[3],xmm3[4,5],xmm4[6],xmm3[7]
; XOP-NEXT: vpunpcklwd {{.*#+}} xmm4 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3]