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llvm-svn: 232822
This commit is contained in:
Simon Pilgrim 2015-03-20 16:08:17 +00:00
parent cef8e71394
commit 180cad2e57
1 changed files with 15 additions and 15 deletions
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30
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -3951,25 +3951,25 @@ static SDValue ExtractSubVector(SDValue Vec, unsigned IdxVal,
unsigned Factor = VT.getSizeInBits()/vectorWidth;
EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
VT.getVectorNumElements()/Factor);
// Extract from UNDEF is UNDEF.
if (Vec.getOpcode() == ISD::UNDEF)
return DAG.getUNDEF(ResultVT);
// Extract the relevant vectorWidth bits. Generate an EXTRACT_SUBVECTOR
unsigned ElemsPerChunk = vectorWidth / ElVT.getSizeInBits();
// This is the index of the first element of the vectorWidth-bit chunk
// we want.
unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / vectorWidth)
* ElemsPerChunk);
// If the input is a buildvector just emit a smaller one.
if (Vec.getOpcode() == ISD::BUILD_VECTOR)
return DAG.getNode(ISD::BUILD_VECTOR, dl, ResultVT,
makeArrayRef(Vec->op_begin() + NormalizedIdxVal,
ElemsPerChunk));
SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec, VecIdx);
}
@ -4005,15 +4005,15 @@ static SDValue InsertSubVector(SDValue Result, SDValue Vec,
EVT VT = Vec.getValueType();
EVT ElVT = VT.getVectorElementType();
EVT ResultVT = Result.getValueType();
// Insert the relevant vectorWidth bits.
unsigned ElemsPerChunk = vectorWidth/ElVT.getSizeInBits();
// This is the index of the first element of the vectorWidth-bit chunk
// we want.
unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/vectorWidth)
* ElemsPerChunk);
SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec, VecIdx);
}
@ -4027,7 +4027,7 @@ static SDValue InsertSubVector(SDValue Result, SDValue Vec,
static SDValue Insert128BitVector(SDValue Result, SDValue Vec, unsigned IdxVal,
SelectionDAG &DAG, SDLoc dl) {
assert(Vec.getValueType().is128BitVector() && "Unexpected vector size!");
// For insertion into the zero index (low half) of a 256-bit vector, it is
// more efficient to generate a blend with immediate instead of an insert*128.
// We are still creating an INSERT_SUBVECTOR below with an undef node to
@ -4040,7 +4040,7 @@ static SDValue Insert128BitVector(SDValue Result, SDValue Vec, unsigned IdxVal,
SDValue Undef = DAG.getUNDEF(ResultVT);
SDValue Vec256 = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Undef,
Vec, ZeroIndex);
// The blend instruction, and therefore its mask, depend on the data type.
MVT ScalarType = ResultVT.getScalarType().getSimpleVT();
if (ScalarType.isFloatingPoint()) {
@ -4051,25 +4051,25 @@ static SDValue Insert128BitVector(SDValue Result, SDValue Vec, unsigned IdxVal,
SDValue Mask = DAG.getConstant(MaskVal, MVT::i8);
return DAG.getNode(X86ISD::BLENDI, dl, ResultVT, Result, Vec256, Mask);
}
const X86Subtarget &Subtarget =
static_cast<const X86Subtarget &>(DAG.getSubtarget());
// AVX2 is needed for 256-bit integer blend support.
// Integers must be cast to 32-bit because there is only vpblendd;
// vpblendw can't be used for this because it has a handicapped mask.
// If we don't have AVX2, then cast to float. Using a wrong domain blend
// is still more efficient than using the wrong domain vinsertf128 that
// will be created by InsertSubVector().
MVT CastVT = Subtarget.hasAVX2() ? MVT::v8i32 : MVT::v8f32;
SDValue Mask = DAG.getConstant(0x0f, MVT::i8);
Vec256 = DAG.getNode(ISD::BITCAST, dl, CastVT, Vec256);
Vec256 = DAG.getNode(X86ISD::BLENDI, dl, CastVT, Result, Vec256, Mask);
return DAG.getNode(ISD::BITCAST, dl, ResultVT, Vec256);
}
return InsertSubVector(Result, Vec, IdxVal, DAG, dl, 128);
}