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Remove the LowerMMXCONCAT_VECTORS function. It could never execute because there are no legal 64-bit vector types that could be used as inputs to a 128-bit concat_vectors. Remove a target specific SDNode and its patterns that become unused as a result.

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llvm-svn: 161742
This commit is contained in:
Craig Topper 2012-08-13 01:23:55 +00:00
parent 6dbd265685
commit 1032fcf6da
3 changed files with 1 additions and 57 deletions
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40
lib/Target/X86/X86ISelLowering.cpp
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@ -869,12 +869,6 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
// Custom lower build_vector, vector_shuffle, and extract_vector_elt.
for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
MVT VT = (MVT::SimpleValueType)i;
@ -5447,32 +5441,6 @@ X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
return SDValue();
}
// LowerMMXCONCAT_VECTORS - We support concatenate two MMX registers and place
// them in a MMX register. This is better than doing a stack convert.
static SDValue LowerMMXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
EVT ResVT = Op.getValueType();
assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
int Mask[2];
SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
InVec = Op.getOperand(1);
if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
unsigned NumElts = ResVT.getVectorNumElements();
VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
} else {
InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
Mask[0] = 0; Mask[1] = 2;
VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
}
return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
}
// LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
// to create 256-bit vectors from two other 128-bit ones.
static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
@ -5493,13 +5461,7 @@ X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
EVT ResVT = Op.getValueType();
assert(Op.getNumOperands() == 2);
assert((ResVT.is128BitVector() || ResVT.is256BitVector()) &&
"Unsupported CONCAT_VECTORS for value type");
// We support concatenate two MMX registers and place them in a MMX register.
// This is better than doing a stack convert.
if (ResVT.is128BitVector())
return LowerMMXCONCAT_VECTORS(Op, DAG);
assert(ResVT.is256BitVector() && "Unsupported CONCAT_VECTORS for value type");
// 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
// from two other 128-bit ones.

4
lib/Target/X86/X86ISelLowering.h
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@ -137,10 +137,6 @@ namespace llvm {
/// relative displacements.
WrapperRIP,
/// MOVQ2DQ - Copies a 64-bit value from an MMX vector to the low word
/// of an XMM vector, with the high word zero filled.
MOVQ2DQ,
/// MOVDQ2Q - Copies a 64-bit value from the low word of an XMM vector
/// to an MMX vector. If you think this is too close to the previous
/// mnemonic, so do I; blame Intel.

14
lib/Target/X86/X86InstrMMX.td
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@ -554,20 +554,6 @@ def MMX_PMOVMSKBrr : MMXI<0xD7, MRMSrcReg, (outs GR32:$dst), (ins VR64:$src),
(int_x86_mmx_pmovmskb VR64:$src))]>;
// MMX to XMM for vector types
def MMX_X86movq2dq : SDNode<"X86ISD::MOVQ2DQ", SDTypeProfile<1, 1,
[SDTCisVT<0, v2i64>, SDTCisVT<1, x86mmx>]>>;
def : Pat<(v2i64 (MMX_X86movq2dq VR64:$src)),
(v2i64 (MMX_MOVQ2DQrr VR64:$src))>;
def : Pat<(v2i64 (MMX_X86movq2dq (load_mmx addr:$src))),
(v2i64 (MOVQI2PQIrm addr:$src))>;
def : Pat<(v2i64 (MMX_X86movq2dq
(x86mmx (scalar_to_vector (loadi32 addr:$src))))),
(v2i64 (MOVDI2PDIrm addr:$src))>;
// Low word of XMM to MMX.
def MMX_X86movdq2q : SDNode<"X86ISD::MOVDQ2Q", SDTypeProfile<1, 1,
[SDTCisVT<0, x86mmx>, SDTCisVT<1, v2i64>]>>;