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X86: Remove custom lowering of SIGN_EXTEND_INREG

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This was just replicating logic from the legalizer. Covered by existing
tests.

llvm-svn: 230136
This commit is contained in:
Benjamin Kramer 2015-02-21 14:31:29 +00:00
parent 0b46346911
commit 4d964ba1b0
1 changed files with 0 additions and 68 deletions
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68
lib/Target/X86/X86ISelLowering.cpp
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@ -1609,11 +1609,6 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
setOperationAction(ISD::XOR, MVT::v4i32, Legal);
}
// SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
// of this type with custom code.
for (MVT VT : MVT::vector_valuetypes())
setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Custom);
// We want to custom lower some of our intrinsics.
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom);
@ -16336,68 +16331,6 @@ static SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) {
return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
}
// Sign extension of the low part of vector elements. This may be used either
// when sign extend instructions are not available or if the vector element
// sizes already match the sign-extended size. If the vector elements are in
// their pre-extended size and sign extend instructions are available, that will
// be handled by LowerSIGN_EXTEND.
SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
SelectionDAG &DAG) const {
SDLoc dl(Op);
EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
MVT VT = Op.getSimpleValueType();
if (!Subtarget->hasSSE2() || !VT.isVector())
return SDValue();
unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
ExtraVT.getScalarType().getSizeInBits();
switch (VT.SimpleTy) {
default: return SDValue();
case MVT::v8i32:
case MVT::v16i16:
if (!Subtarget->hasFp256())
return SDValue();
if (!Subtarget->hasInt256()) {
// needs to be split
unsigned NumElems = VT.getVectorNumElements();
// Extract the LHS vectors
SDValue LHS = Op.getOperand(0);
SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
MVT EltVT = VT.getVectorElementType();
EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
EVT ExtraEltVT = ExtraVT.getVectorElementType();
unsigned ExtraNumElems = ExtraVT.getVectorNumElements();
ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
ExtraNumElems/2);
SDValue Extra = DAG.getValueType(ExtraVT);
LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);
}
// fall through
case MVT::v4i32:
case MVT::v8i16: {
SDValue Op0 = Op.getOperand(0);
// This is a sign extension of some low part of vector elements without
// changing the size of the vector elements themselves:
// Shift-Left + Shift-Right-Algebraic.
SDValue Shl = getTargetVShiftByConstNode(X86ISD::VSHLI, dl, VT, Op0,
BitsDiff, DAG);
return getTargetVShiftByConstNode(X86ISD::VSRAI, dl, VT, Shl, BitsDiff,
DAG);
}
}
}
/// Returns true if the operand type is exactly twice the native width, and
/// the corresponding cmpxchg8b or cmpxchg16b instruction is available.
/// Used to know whether to use cmpxchg8/16b when expanding atomic operations
@ -16905,7 +16838,6 @@ static SDValue LowerFSINCOS(SDValue Op, const X86Subtarget *Subtarget,
SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
default: llvm_unreachable("Should not custom lower this!");
case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, Subtarget, DAG);
case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS:
return LowerCMP_SWAP(Op, Subtarget, DAG);