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llvm-6502/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
Chris Lattner e8639036b1 it's more elegant to put the "getConstantPool" and 
"getFixedStack" on the MachinePointerInfo class.  While
this isn't the problem I'm setting out to solve, it is the
right way to eliminate PseudoSourceValue, so lets go with it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114406 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-21 06:22:23 +00:00

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//===-- SPUISelDAGToDAG.cpp - CellSPU pattern matching inst selector ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines a pattern matching instruction selector for the Cell SPU,
// converting from a legalized dag to a SPU-target dag.
//
//===----------------------------------------------------------------------===//
#include "SPU.h"
#include "SPUTargetMachine.h"
#include "SPUHazardRecognizers.h"
#include "SPUFrameInfo.h"
#include "SPURegisterNames.h"
#include "SPUTargetMachine.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Constants.h"
#include "llvm/GlobalValue.h"
#include "llvm/Intrinsics.h"
#include "llvm/LLVMContext.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
//! ConstantSDNode predicate for i32 sign-extended, 10-bit immediates
bool
isI32IntS10Immediate(ConstantSDNode *CN)
{
return isInt<10>(CN->getSExtValue());
}
//! ConstantSDNode predicate for i32 unsigned 10-bit immediate values
bool
isI32IntU10Immediate(ConstantSDNode *CN)
{
return isUInt<10>(CN->getSExtValue());
}
//! ConstantSDNode predicate for i16 sign-extended, 10-bit immediate values
bool
isI16IntS10Immediate(ConstantSDNode *CN)
{
return isInt<10>(CN->getSExtValue());
}
//! ConstantSDNode predicate for i16 unsigned 10-bit immediate values
bool
isI16IntU10Immediate(ConstantSDNode *CN)
{
return isUInt<10>((short) CN->getZExtValue());
}
//! ConstantSDNode predicate for signed 16-bit values
/*!
\arg CN The constant SelectionDAG node holding the value
\arg Imm The returned 16-bit value, if returning true
This predicate tests the value in \a CN to see whether it can be
represented as a 16-bit, sign-extended quantity. Returns true if
this is the case.
*/
bool
isIntS16Immediate(ConstantSDNode *CN, short &Imm)
{
EVT vt = CN->getValueType(0);
Imm = (short) CN->getZExtValue();
if (vt.getSimpleVT() >= MVT::i1 && vt.getSimpleVT() <= MVT::i16) {
return true;
} else if (vt == MVT::i32) {
int32_t i_val = (int32_t) CN->getZExtValue();
short s_val = (short) i_val;
return i_val == s_val;
} else {
int64_t i_val = (int64_t) CN->getZExtValue();
short s_val = (short) i_val;
return i_val == s_val;
}
return false;
}
//! ConstantFPSDNode predicate for representing floats as 16-bit sign ext.
static bool
isFPS16Immediate(ConstantFPSDNode *FPN, short &Imm)
{
EVT vt = FPN->getValueType(0);
if (vt == MVT::f32) {
int val = FloatToBits(FPN->getValueAPF().convertToFloat());
int sval = (int) ((val << 16) >> 16);
Imm = (short) val;
return val == sval;
}
return false;
}
//===------------------------------------------------------------------===//
//! EVT to "useful stuff" mapping structure:
struct valtype_map_s {
EVT VT;
unsigned ldresult_ins; /// LDRESULT instruction (0 = undefined)
bool ldresult_imm; /// LDRESULT instruction requires immediate?
unsigned lrinst; /// LR instruction
};
const valtype_map_s valtype_map[] = {
{ MVT::i8, SPU::ORBIr8, true, SPU::LRr8 },
{ MVT::i16, SPU::ORHIr16, true, SPU::LRr16 },
{ MVT::i32, SPU::ORIr32, true, SPU::LRr32 },
{ MVT::i64, SPU::ORr64, false, SPU::LRr64 },
{ MVT::f32, SPU::ORf32, false, SPU::LRf32 },
{ MVT::f64, SPU::ORf64, false, SPU::LRf64 },
// vector types... (sigh!)
{ MVT::v16i8, 0, false, SPU::LRv16i8 },
{ MVT::v8i16, 0, false, SPU::LRv8i16 },
{ MVT::v4i32, 0, false, SPU::LRv4i32 },
{ MVT::v2i64, 0, false, SPU::LRv2i64 },
{ MVT::v4f32, 0, false, SPU::LRv4f32 },
{ MVT::v2f64, 0, false, SPU::LRv2f64 }
};
const size_t n_valtype_map = sizeof(valtype_map) / sizeof(valtype_map[0]);
const valtype_map_s *getValueTypeMapEntry(EVT VT)
{
const valtype_map_s *retval = 0;
for (size_t i = 0; i < n_valtype_map; ++i) {
if (valtype_map[i].VT == VT) {
retval = valtype_map + i;
break;
}
}
#ifndef NDEBUG
if (retval == 0) {
report_fatal_error("SPUISelDAGToDAG.cpp: getValueTypeMapEntry returns"
"NULL for " + Twine(VT.getEVTString()));
}
#endif
return retval;
}
//! Generate the carry-generate shuffle mask.
SDValue getCarryGenerateShufMask(SelectionDAG &DAG, DebugLoc dl) {
SmallVector<SDValue, 16 > ShufBytes;
// Create the shuffle mask for "rotating" the borrow up one register slot
// once the borrow is generated.
ShufBytes.push_back(DAG.getConstant(0x04050607, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0x80808080, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0x0c0d0e0f, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0x80808080, MVT::i32));
return DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
&ShufBytes[0], ShufBytes.size());
}
//! Generate the borrow-generate shuffle mask
SDValue getBorrowGenerateShufMask(SelectionDAG &DAG, DebugLoc dl) {
SmallVector<SDValue, 16 > ShufBytes;
// Create the shuffle mask for "rotating" the borrow up one register slot
// once the borrow is generated.
ShufBytes.push_back(DAG.getConstant(0x04050607, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0xc0c0c0c0, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0x0c0d0e0f, MVT::i32));
ShufBytes.push_back(DAG.getConstant(0xc0c0c0c0, MVT::i32));
return DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
&ShufBytes[0], ShufBytes.size());
}
//===------------------------------------------------------------------===//
/// SPUDAGToDAGISel - Cell SPU-specific code to select SPU machine
/// instructions for SelectionDAG operations.
///
class SPUDAGToDAGISel :
public SelectionDAGISel
{
const SPUTargetMachine &TM;
const SPUTargetLowering &SPUtli;
unsigned GlobalBaseReg;
public:
explicit SPUDAGToDAGISel(SPUTargetMachine &tm) :
SelectionDAGISel(tm),
TM(tm),
SPUtli(*tm.getTargetLowering())
{ }
virtual bool runOnMachineFunction(MachineFunction &MF) {
// Make sure we re-emit a set of the global base reg if necessary
GlobalBaseReg = 0;
SelectionDAGISel::runOnMachineFunction(MF);
return true;
}
/// getI32Imm - Return a target constant with the specified value, of type
/// i32.
inline SDValue getI32Imm(uint32_t Imm) {
return CurDAG->getTargetConstant(Imm, MVT::i32);
}
/// getSmallIPtrImm - Return a target constant of pointer type.
inline SDValue getSmallIPtrImm(unsigned Imm) {
return CurDAG->getTargetConstant(Imm, SPUtli.getPointerTy());
}
SDNode *emitBuildVector(SDNode *bvNode) {
EVT vecVT = bvNode->getValueType(0);
DebugLoc dl = bvNode->getDebugLoc();
// Check to see if this vector can be represented as a CellSPU immediate
// constant by invoking all of the instruction selection predicates:
if (((vecVT == MVT::v8i16) &&
(SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i16).getNode() != 0)) ||
((vecVT == MVT::v4i32) &&
((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
(SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
(SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
(SPU::get_v4i32_imm(bvNode, *CurDAG).getNode() != 0))) ||
((vecVT == MVT::v2i64) &&
((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
(SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
(SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i64).getNode() != 0)))) {
HandleSDNode Dummy(SDValue(bvNode, 0));
if (SDNode *N = Select(bvNode))
return N;
return Dummy.getValue().getNode();
}
// No, need to emit a constant pool spill:
std::vector<Constant*> CV;
for (size_t i = 0; i < bvNode->getNumOperands(); ++i) {
ConstantSDNode *V = cast<ConstantSDNode > (bvNode->getOperand(i));
CV.push_back(const_cast<ConstantInt *>(V->getConstantIntValue()));
}
const Constant *CP = ConstantVector::get(CV);
SDValue CPIdx = CurDAG->getConstantPool(CP, SPUtli.getPointerTy());
unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
SDValue CGPoolOffset =
SPU::LowerConstantPool(CPIdx, *CurDAG, TM);
HandleSDNode Dummy(CurDAG->getLoad(vecVT, dl,
CurDAG->getEntryNode(), CGPoolOffset,
MachinePointerInfo::getConstantPool(),
false, false, Alignment));
CurDAG->ReplaceAllUsesWith(SDValue(bvNode, 0), Dummy.getValue());
if (SDNode *N = SelectCode(Dummy.getValue().getNode()))
return N;
return Dummy.getValue().getNode();
}
/// Select - Convert the specified operand from a target-independent to a
/// target-specific node if it hasn't already been changed.
SDNode *Select(SDNode *N);
//! Emit the instruction sequence for i64 shl
SDNode *SelectSHLi64(SDNode *N, EVT OpVT);
//! Emit the instruction sequence for i64 srl
SDNode *SelectSRLi64(SDNode *N, EVT OpVT);
//! Emit the instruction sequence for i64 sra
SDNode *SelectSRAi64(SDNode *N, EVT OpVT);
//! Emit the necessary sequence for loading i64 constants:
SDNode *SelectI64Constant(SDNode *N, EVT OpVT, DebugLoc dl);
//! Alternate instruction emit sequence for loading i64 constants
SDNode *SelectI64Constant(uint64_t i64const, EVT OpVT, DebugLoc dl);
//! Returns true if the address N is an A-form (local store) address
bool SelectAFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index);
//! D-form address predicate
bool SelectDFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index);
/// Alternate D-form address using i7 offset predicate
bool SelectDForm2Addr(SDNode *Op, SDValue N, SDValue &Disp,
SDValue &Base);
/// D-form address selection workhorse
bool DFormAddressPredicate(SDNode *Op, SDValue N, SDValue &Disp,
SDValue &Base, int minOffset, int maxOffset);
//! Address predicate if N can be expressed as an indexed [r+r] operation.
bool SelectXFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index);
/// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
/// inline asm expressions.
virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
char ConstraintCode,
std::vector<SDValue> &OutOps) {
SDValue Op0, Op1;
switch (ConstraintCode) {
default: return true;
case 'm': // memory
if (!SelectDFormAddr(Op.getNode(), Op, Op0, Op1)
&& !SelectAFormAddr(Op.getNode(), Op, Op0, Op1))
SelectXFormAddr(Op.getNode(), Op, Op0, Op1);
break;
case 'o': // offsetable
if (!SelectDFormAddr(Op.getNode(), Op, Op0, Op1)
&& !SelectAFormAddr(Op.getNode(), Op, Op0, Op1)) {
Op0 = Op;
Op1 = getSmallIPtrImm(0);
}
break;
case 'v': // not offsetable
#if 1
llvm_unreachable("InlineAsmMemoryOperand 'v' constraint not handled.");
#else
SelectAddrIdxOnly(Op, Op, Op0, Op1);
#endif
break;
}
OutOps.push_back(Op0);
OutOps.push_back(Op1);
return false;
}
virtual const char *getPassName() const {
return "Cell SPU DAG->DAG Pattern Instruction Selection";
}
/// CreateTargetHazardRecognizer - Return the hazard recognizer to use for
/// this target when scheduling the DAG.
virtual ScheduleHazardRecognizer *CreateTargetHazardRecognizer() {
const TargetInstrInfo *II = TM.getInstrInfo();
assert(II && "No InstrInfo?");
return new SPUHazardRecognizer(*II);
}
private:
SDValue getRC( MVT );
// Include the pieces autogenerated from the target description.
#include "SPUGenDAGISel.inc"
};
}
/*!
\arg Op The ISD instruction operand
\arg N The address to be tested
\arg Base The base address
\arg Index The base address index
*/
bool
SPUDAGToDAGISel::SelectAFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index) {
// These match the addr256k operand type:
EVT OffsVT = MVT::i16;
SDValue Zero = CurDAG->getTargetConstant(0, OffsVT);
switch (N.getOpcode()) {
case ISD::Constant:
case ISD::ConstantPool:
case ISD::GlobalAddress:
report_fatal_error("SPU SelectAFormAddr: Constant/Pool/Global not lowered.");
/*NOTREACHED*/
case ISD::TargetConstant:
case ISD::TargetGlobalAddress:
case ISD::TargetJumpTable:
report_fatal_error("SPUSelectAFormAddr: Target Constant/Pool/Global "
"not wrapped as A-form address.");
/*NOTREACHED*/
case SPUISD::AFormAddr:
// Just load from memory if there's only a single use of the location,
// otherwise, this will get handled below with D-form offset addresses
if (N.hasOneUse()) {
SDValue Op0 = N.getOperand(0);
switch (Op0.getOpcode()) {
case ISD::TargetConstantPool:
case ISD::TargetJumpTable:
Base = Op0;
Index = Zero;
return true;
case ISD::TargetGlobalAddress: {
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op0);
const GlobalValue *GV = GSDN->getGlobal();
if (GV->getAlignment() == 16) {
Base = Op0;
Index = Zero;
return true;
}
break;
}
}
}
break;
}
return false;
}
bool
SPUDAGToDAGISel::SelectDForm2Addr(SDNode *Op, SDValue N, SDValue &Disp,
SDValue &Base) {
const int minDForm2Offset = -(1 << 7);
const int maxDForm2Offset = (1 << 7) - 1;
return DFormAddressPredicate(Op, N, Disp, Base, minDForm2Offset,
maxDForm2Offset);
}
/*!
\arg Op The ISD instruction (ignored)
\arg N The address to be tested
\arg Base Base address register/pointer
\arg Index Base address index
Examine the input address by a base register plus a signed 10-bit
displacement, [r+I10] (D-form address).
\return true if \a N is a D-form address with \a Base and \a Index set
to non-empty SDValue instances.
*/
bool
SPUDAGToDAGISel::SelectDFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index) {
return DFormAddressPredicate(Op, N, Base, Index,
SPUFrameInfo::minFrameOffset(),
SPUFrameInfo::maxFrameOffset());
}
bool
SPUDAGToDAGISel::DFormAddressPredicate(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index, int minOffset,
int maxOffset) {
unsigned Opc = N.getOpcode();
EVT PtrTy = SPUtli.getPointerTy();
if (Opc == ISD::FrameIndex) {
// Stack frame index must be less than 512 (divided by 16):
FrameIndexSDNode *FIN = cast<FrameIndexSDNode>(N);
int FI = int(FIN->getIndex());
DEBUG(errs() << "SelectDFormAddr: ISD::FrameIndex = "
<< FI << "\n");
if (SPUFrameInfo::FItoStackOffset(FI) < maxOffset) {
Base = CurDAG->getTargetConstant(0, PtrTy);
Index = CurDAG->getTargetFrameIndex(FI, PtrTy);
return true;
}
} else if (Opc == ISD::ADD) {
// Generated by getelementptr
const SDValue Op0 = N.getOperand(0);
const SDValue Op1 = N.getOperand(1);
if ((Op0.getOpcode() == SPUISD::Hi && Op1.getOpcode() == SPUISD::Lo)
|| (Op1.getOpcode() == SPUISD::Hi && Op0.getOpcode() == SPUISD::Lo)) {
Base = CurDAG->getTargetConstant(0, PtrTy);
Index = N;
return true;
} else if (Op1.getOpcode() == ISD::Constant
|| Op1.getOpcode() == ISD::TargetConstant) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op1);
int32_t offset = int32_t(CN->getSExtValue());
if (Op0.getOpcode() == ISD::FrameIndex) {
FrameIndexSDNode *FIN = cast<FrameIndexSDNode>(Op0);
int FI = int(FIN->getIndex());
DEBUG(errs() << "SelectDFormAddr: ISD::ADD offset = " << offset
<< " frame index = " << FI << "\n");
if (SPUFrameInfo::FItoStackOffset(FI) < maxOffset) {
Base = CurDAG->getTargetConstant(offset, PtrTy);
Index = CurDAG->getTargetFrameIndex(FI, PtrTy);
return true;
}
} else if (offset > minOffset && offset < maxOffset) {
Base = CurDAG->getTargetConstant(offset, PtrTy);
Index = Op0;
return true;
}
} else if (Op0.getOpcode() == ISD::Constant
|| Op0.getOpcode() == ISD::TargetConstant) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op0);
int32_t offset = int32_t(CN->getSExtValue());
if (Op1.getOpcode() == ISD::FrameIndex) {
FrameIndexSDNode *FIN = cast<FrameIndexSDNode>(Op1);
int FI = int(FIN->getIndex());
DEBUG(errs() << "SelectDFormAddr: ISD::ADD offset = " << offset
<< " frame index = " << FI << "\n");
if (SPUFrameInfo::FItoStackOffset(FI) < maxOffset) {
Base = CurDAG->getTargetConstant(offset, PtrTy);
Index = CurDAG->getTargetFrameIndex(FI, PtrTy);
return true;
}
} else if (offset > minOffset && offset < maxOffset) {
Base = CurDAG->getTargetConstant(offset, PtrTy);
Index = Op1;
return true;
}
}
} else if (Opc == SPUISD::IndirectAddr) {
// Indirect with constant offset -> D-Form address
const SDValue Op0 = N.getOperand(0);
const SDValue Op1 = N.getOperand(1);
if (Op0.getOpcode() == SPUISD::Hi
&& Op1.getOpcode() == SPUISD::Lo) {
// (SPUindirect (SPUhi <arg>, 0), (SPUlo <arg>, 0))
Base = CurDAG->getTargetConstant(0, PtrTy);
Index = N;
return true;
} else if (isa<ConstantSDNode>(Op0) || isa<ConstantSDNode>(Op1)) {
int32_t offset = 0;
SDValue idxOp;
if (isa<ConstantSDNode>(Op1)) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op1);
offset = int32_t(CN->getSExtValue());
idxOp = Op0;
} else if (isa<ConstantSDNode>(Op0)) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op0);
offset = int32_t(CN->getSExtValue());
idxOp = Op1;
}
if (offset >= minOffset && offset <= maxOffset) {
Base = CurDAG->getTargetConstant(offset, PtrTy);
Index = idxOp;
return true;
}
}
} else if (Opc == SPUISD::AFormAddr) {
Base = CurDAG->getTargetConstant(0, N.getValueType());
Index = N;
return true;
} else if (Opc == SPUISD::LDRESULT) {
Base = CurDAG->getTargetConstant(0, N.getValueType());
Index = N;
return true;
} else if (Opc == ISD::Register
||Opc == ISD::CopyFromReg
||Opc == ISD::UNDEF
||Opc == ISD::Constant) {
unsigned OpOpc = Op->getOpcode();
if (OpOpc == ISD::STORE || OpOpc == ISD::LOAD) {
// Direct load/store without getelementptr
SDValue Offs;
Offs = ((OpOpc == ISD::STORE) ? Op->getOperand(3) : Op->getOperand(2));
if (Offs.getOpcode() == ISD::Constant || Offs.getOpcode() == ISD::UNDEF) {
if (Offs.getOpcode() == ISD::UNDEF)
Offs = CurDAG->getTargetConstant(0, Offs.getValueType());
Base = Offs;
Index = N;
return true;
}
} else {
/* If otherwise unadorned, default to D-form address with 0 offset: */
if (Opc == ISD::CopyFromReg) {
Index = N.getOperand(1);
} else {
Index = N;
}
Base = CurDAG->getTargetConstant(0, Index.getValueType());
return true;
}
}
return false;
}
/*!
\arg Op The ISD instruction operand
\arg N The address operand
\arg Base The base pointer operand
\arg Index The offset/index operand
If the address \a N can be expressed as an A-form or D-form address, returns
false. Otherwise, creates two operands, Base and Index that will become the
(r)(r) X-form address.
*/
bool
SPUDAGToDAGISel::SelectXFormAddr(SDNode *Op, SDValue N, SDValue &Base,
SDValue &Index) {
if (!SelectAFormAddr(Op, N, Base, Index)
&& !SelectDFormAddr(Op, N, Base, Index)) {
// If the address is neither A-form or D-form, punt and use an X-form
// address:
Base = N.getOperand(1);
Index = N.getOperand(0);
return true;
}
return false;
}
/*!
Utility function to use with COPY_TO_REGCLASS instructions. Returns a SDValue
to be used as the last parameter of a
CurDAG->getMachineNode(COPY_TO_REGCLASS,..., ) function call
\arg VT the value type for which we want a register class
*/
SDValue SPUDAGToDAGISel::getRC( MVT VT ) {
switch( VT.SimpleTy ) {
case MVT::i32:
return CurDAG->getTargetConstant(SPU::R32CRegClass.getID(), MVT::i32);
break;
case MVT::i64:
return CurDAG->getTargetConstant(SPU::R64CRegClass.getID(), MVT::i32);
break;
case MVT::v2i64:
return CurDAG->getTargetConstant(SPU::VECREGRegClass.getID(), MVT::i32);
break;
default:
assert( false && "add a new case here" );
}
return SDValue();
}
//! Convert the operand from a target-independent to a target-specific node
/*!
*/
SDNode *
SPUDAGToDAGISel::Select(SDNode *N) {
unsigned Opc = N->getOpcode();
int n_ops = -1;
unsigned NewOpc;
EVT OpVT = N->getValueType(0);
SDValue Ops[8];
DebugLoc dl = N->getDebugLoc();
if (N->isMachineOpcode())
return NULL; // Already selected.
if (Opc == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(N)->getIndex();
SDValue TFI = CurDAG->getTargetFrameIndex(FI, N->getValueType(0));
SDValue Imm0 = CurDAG->getTargetConstant(0, N->getValueType(0));
if (FI < 128) {
NewOpc = SPU::AIr32;
Ops[0] = TFI;
Ops[1] = Imm0;
n_ops = 2;
} else {
NewOpc = SPU::Ar32;
Ops[0] = CurDAG->getRegister(SPU::R1, N->getValueType(0));
Ops[1] = SDValue(CurDAG->getMachineNode(SPU::ILAr32, dl,
N->getValueType(0), TFI, Imm0),
0);
n_ops = 2;
}
} else if (Opc == ISD::Constant && OpVT == MVT::i64) {
// Catch the i64 constants that end up here. Note: The backend doesn't
// attempt to legalize the constant (it's useless because DAGCombiner
// will insert 64-bit constants and we can't stop it).
return SelectI64Constant(N, OpVT, N->getDebugLoc());
} else if ((Opc == ISD::ZERO_EXTEND || Opc == ISD::ANY_EXTEND)
&& OpVT == MVT::i64) {
SDValue Op0 = N->getOperand(0);
EVT Op0VT = Op0.getValueType();
EVT Op0VecVT = EVT::getVectorVT(*CurDAG->getContext(),
Op0VT, (128 / Op0VT.getSizeInBits()));
EVT OpVecVT = EVT::getVectorVT(*CurDAG->getContext(),
OpVT, (128 / OpVT.getSizeInBits()));
SDValue shufMask;
switch (Op0VT.getSimpleVT().SimpleTy) {
default:
report_fatal_error("CellSPU Select: Unhandled zero/any extend EVT");
/*NOTREACHED*/
case MVT::i32:
shufMask = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x00010203, MVT::i32),
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x08090a0b, MVT::i32));
break;
case MVT::i16:
shufMask = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x80800203, MVT::i32),
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x80800a0b, MVT::i32));
break;
case MVT::i8:
shufMask = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x80808003, MVT::i32),
CurDAG->getConstant(0x80808080, MVT::i32),
CurDAG->getConstant(0x8080800b, MVT::i32));
break;
}
SDNode *shufMaskLoad = emitBuildVector(shufMask.getNode());
HandleSDNode PromoteScalar(CurDAG->getNode(SPUISD::PREFSLOT2VEC, dl,
Op0VecVT, Op0));
SDValue PromScalar;
if (SDNode *N = SelectCode(PromoteScalar.getValue().getNode()))
PromScalar = SDValue(N, 0);
else
PromScalar = PromoteScalar.getValue();
SDValue zextShuffle =
CurDAG->getNode(SPUISD::SHUFB, dl, OpVecVT,
PromScalar, PromScalar,
SDValue(shufMaskLoad, 0));
HandleSDNode Dummy2(zextShuffle);
if (SDNode *N = SelectCode(Dummy2.getValue().getNode()))
zextShuffle = SDValue(N, 0);
else
zextShuffle = Dummy2.getValue();
HandleSDNode Dummy(CurDAG->getNode(SPUISD::VEC2PREFSLOT, dl, OpVT,
zextShuffle));
CurDAG->ReplaceAllUsesWith(N, Dummy.getValue().getNode());
SelectCode(Dummy.getValue().getNode());
return Dummy.getValue().getNode();
} else if (Opc == ISD::ADD && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
emitBuildVector(getCarryGenerateShufMask(*CurDAG, dl).getNode());
HandleSDNode Dummy(CurDAG->getNode(SPUISD::ADD64_MARKER, dl, OpVT,
N->getOperand(0), N->getOperand(1),
SDValue(CGLoad, 0)));
CurDAG->ReplaceAllUsesWith(N, Dummy.getValue().getNode());
if (SDNode *N = SelectCode(Dummy.getValue().getNode()))
return N;
return Dummy.getValue().getNode();
} else if (Opc == ISD::SUB && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
emitBuildVector(getBorrowGenerateShufMask(*CurDAG, dl).getNode());
HandleSDNode Dummy(CurDAG->getNode(SPUISD::SUB64_MARKER, dl, OpVT,
N->getOperand(0), N->getOperand(1),
SDValue(CGLoad, 0)));
CurDAG->ReplaceAllUsesWith(N, Dummy.getValue().getNode());
if (SDNode *N = SelectCode(Dummy.getValue().getNode()))
return N;
return Dummy.getValue().getNode();
} else if (Opc == ISD::MUL && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
emitBuildVector(getCarryGenerateShufMask(*CurDAG, dl).getNode());
HandleSDNode Dummy(CurDAG->getNode(SPUISD::MUL64_MARKER, dl, OpVT,
N->getOperand(0), N->getOperand(1),
SDValue(CGLoad, 0)));
CurDAG->ReplaceAllUsesWith(N, Dummy.getValue().getNode());
if (SDNode *N = SelectCode(Dummy.getValue().getNode()))
return N;
return Dummy.getValue().getNode();
} else if (Opc == ISD::TRUNCATE) {
SDValue Op0 = N->getOperand(0);
if ((Op0.getOpcode() == ISD::SRA || Op0.getOpcode() == ISD::SRL)
&& OpVT == MVT::i32
&& Op0.getValueType() == MVT::i64) {
// Catch (truncate:i32 ([sra|srl]:i64 arg, c), where c >= 32
//
// Take advantage of the fact that the upper 32 bits are in the
// i32 preferred slot and avoid shuffle gymnastics:
ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Op0.getOperand(1));
if (CN != 0) {
unsigned shift_amt = unsigned(CN->getZExtValue());
if (shift_amt >= 32) {
SDNode *hi32 =
CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl, OpVT,
Op0.getOperand(0), getRC(MVT::i32));
shift_amt -= 32;
if (shift_amt > 0) {
// Take care of the additional shift, if present:
SDValue shift = CurDAG->getTargetConstant(shift_amt, MVT::i32);
unsigned Opc = SPU::ROTMAIr32_i32;
if (Op0.getOpcode() == ISD::SRL)
Opc = SPU::ROTMr32;
hi32 = CurDAG->getMachineNode(Opc, dl, OpVT, SDValue(hi32, 0),
shift);
}
return hi32;
}
}
}
} else if (Opc == ISD::SHL) {
if (OpVT == MVT::i64)
return SelectSHLi64(N, OpVT);
} else if (Opc == ISD::SRL) {
if (OpVT == MVT::i64)
return SelectSRLi64(N, OpVT);
} else if (Opc == ISD::SRA) {
if (OpVT == MVT::i64)
return SelectSRAi64(N, OpVT);
} else if (Opc == ISD::FNEG
&& (OpVT == MVT::f64 || OpVT == MVT::v2f64)) {
DebugLoc dl = N->getDebugLoc();
// Check if the pattern is a special form of DFNMS:
// (fneg (fsub (fmul R64FP:$rA, R64FP:$rB), R64FP:$rC))
SDValue Op0 = N->getOperand(0);
if (Op0.getOpcode() == ISD::FSUB) {
SDValue Op00 = Op0.getOperand(0);
if (Op00.getOpcode() == ISD::FMUL) {
unsigned Opc = SPU::DFNMSf64;
if (OpVT == MVT::v2f64)
Opc = SPU::DFNMSv2f64;
return CurDAG->getMachineNode(Opc, dl, OpVT,
Op00.getOperand(0),
Op00.getOperand(1),
Op0.getOperand(1));
}
}
SDValue negConst = CurDAG->getConstant(0x8000000000000000ULL, MVT::i64);
SDNode *signMask = 0;
unsigned Opc = SPU::XORfneg64;
if (OpVT == MVT::f64) {
signMask = SelectI64Constant(negConst.getNode(), MVT::i64, dl);
} else if (OpVT == MVT::v2f64) {
Opc = SPU::XORfnegvec;
signMask = emitBuildVector(CurDAG->getNode(ISD::BUILD_VECTOR, dl,
MVT::v2i64,
negConst, negConst).getNode());
}
return CurDAG->getMachineNode(Opc, dl, OpVT,
N->getOperand(0), SDValue(signMask, 0));
} else if (Opc == ISD::FABS) {
if (OpVT == MVT::f64) {
SDNode *signMask = SelectI64Constant(0x7fffffffffffffffULL, MVT::i64, dl);
return CurDAG->getMachineNode(SPU::ANDfabs64, dl, OpVT,
N->getOperand(0), SDValue(signMask, 0));
} else if (OpVT == MVT::v2f64) {
SDValue absConst = CurDAG->getConstant(0x7fffffffffffffffULL, MVT::i64);
SDValue absVec = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64,
absConst, absConst);
SDNode *signMask = emitBuildVector(absVec.getNode());
return CurDAG->getMachineNode(SPU::ANDfabsvec, dl, OpVT,
N->getOperand(0), SDValue(signMask, 0));
}
} else if (Opc == SPUISD::LDRESULT) {
// Custom select instructions for LDRESULT
EVT VT = N->getValueType(0);
SDValue Arg = N->getOperand(0);
SDValue Chain = N->getOperand(1);
SDNode *Result;
const valtype_map_s *vtm = getValueTypeMapEntry(VT);
if (vtm->ldresult_ins == 0) {
report_fatal_error("LDRESULT for unsupported type: " +
Twine(VT.getEVTString()));
}
Opc = vtm->ldresult_ins;
if (vtm->ldresult_imm) {
SDValue Zero = CurDAG->getTargetConstant(0, VT);
Result = CurDAG->getMachineNode(Opc, dl, VT, MVT::Other, Arg, Zero, Chain);
} else {
Result = CurDAG->getMachineNode(Opc, dl, VT, MVT::Other, Arg, Arg, Chain);
}
return Result;
} else if (Opc == SPUISD::IndirectAddr) {
// Look at the operands: SelectCode() will catch the cases that aren't
// specifically handled here.
//
// SPUInstrInfo catches the following patterns:
// (SPUindirect (SPUhi ...), (SPUlo ...))
// (SPUindirect $sp, imm)
EVT VT = N->getValueType(0);
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
RegisterSDNode *RN;
if ((Op0.getOpcode() != SPUISD::Hi && Op1.getOpcode() != SPUISD::Lo)
|| (Op0.getOpcode() == ISD::Register
&& ((RN = dyn_cast<RegisterSDNode>(Op0.getNode())) != 0
&& RN->getReg() != SPU::R1))) {
NewOpc = SPU::Ar32;
Ops[1] = Op1;
if (Op1.getOpcode() == ISD::Constant) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op1);
Op1 = CurDAG->getTargetConstant(CN->getSExtValue(), VT);
if (isInt<10>(CN->getSExtValue())) {
NewOpc = SPU::AIr32;
Ops[1] = Op1;
} else {
Ops[1] = SDValue(CurDAG->getMachineNode(SPU::ILr32, dl,
N->getValueType(0),
Op1),
0);
}
}
Ops[0] = Op0;
n_ops = 2;
}
}
if (n_ops > 0) {
if (N->hasOneUse())
return CurDAG->SelectNodeTo(N, NewOpc, OpVT, Ops, n_ops);
else
return CurDAG->getMachineNode(NewOpc, dl, OpVT, Ops, n_ops);
} else
return SelectCode(N);
}
/*!
* Emit the instruction sequence for i64 left shifts. The basic algorithm
* is to fill the bottom two word slots with zeros so that zeros are shifted
* in as the entire quadword is shifted left.
*
* \note This code could also be used to implement v2i64 shl.
*
* @param Op The shl operand
* @param OpVT Op's machine value value type (doesn't need to be passed, but
* makes life easier.)
* @return The SDNode with the entire instruction sequence
*/
SDNode *
SPUDAGToDAGISel::SelectSHLi64(SDNode *N, EVT OpVT) {
SDValue Op0 = N->getOperand(0);
EVT VecVT = EVT::getVectorVT(*CurDAG->getContext(),
OpVT, (128 / OpVT.getSizeInBits()));
SDValue ShiftAmt = N->getOperand(1);
EVT ShiftAmtVT = ShiftAmt.getValueType();
SDNode *VecOp0, *SelMask, *ZeroFill, *Shift = 0;
SDValue SelMaskVal;
DebugLoc dl = N->getDebugLoc();
VecOp0 = CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl, VecVT,
Op0, getRC(MVT::v2i64) );
SelMaskVal = CurDAG->getTargetConstant(0xff00ULL, MVT::i16);
SelMask = CurDAG->getMachineNode(SPU::FSMBIv2i64, dl, VecVT, SelMaskVal);
ZeroFill = CurDAG->getMachineNode(SPU::ILv2i64, dl, VecVT,
CurDAG->getTargetConstant(0, OpVT));
VecOp0 = CurDAG->getMachineNode(SPU::SELBv2i64, dl, VecVT,
SDValue(ZeroFill, 0),
SDValue(VecOp0, 0),
SDValue(SelMask, 0));
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(ShiftAmt)) {
unsigned bytes = unsigned(CN->getZExtValue()) >> 3;
unsigned bits = unsigned(CN->getZExtValue()) & 7;
if (bytes > 0) {
Shift =
CurDAG->getMachineNode(SPU::SHLQBYIv2i64, dl, VecVT,
SDValue(VecOp0, 0),
CurDAG->getTargetConstant(bytes, ShiftAmtVT));
}
if (bits > 0) {
Shift =
CurDAG->getMachineNode(SPU::SHLQBIIv2i64, dl, VecVT,
SDValue((Shift != 0 ? Shift : VecOp0), 0),
CurDAG->getTargetConstant(bits, ShiftAmtVT));
}
} else {
SDNode *Bytes =
CurDAG->getMachineNode(SPU::ROTMIr32, dl, ShiftAmtVT,
ShiftAmt,
CurDAG->getTargetConstant(3, ShiftAmtVT));
SDNode *Bits =
CurDAG->getMachineNode(SPU::ANDIr32, dl, ShiftAmtVT,
ShiftAmt,
CurDAG->getTargetConstant(7, ShiftAmtVT));
Shift =
CurDAG->getMachineNode(SPU::SHLQBYv2i64, dl, VecVT,
SDValue(VecOp0, 0), SDValue(Bytes, 0));
Shift =
CurDAG->getMachineNode(SPU::SHLQBIv2i64, dl, VecVT,
SDValue(Shift, 0), SDValue(Bits, 0));
}
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
OpVT, SDValue(Shift, 0), getRC(MVT::i64));
}
/*!
* Emit the instruction sequence for i64 logical right shifts.
*
* @param Op The shl operand
* @param OpVT Op's machine value value type (doesn't need to be passed, but
* makes life easier.)
* @return The SDNode with the entire instruction sequence
*/
SDNode *
SPUDAGToDAGISel::SelectSRLi64(SDNode *N, EVT OpVT) {
SDValue Op0 = N->getOperand(0);
EVT VecVT = EVT::getVectorVT(*CurDAG->getContext(),
OpVT, (128 / OpVT.getSizeInBits()));
SDValue ShiftAmt = N->getOperand(1);
EVT ShiftAmtVT = ShiftAmt.getValueType();
SDNode *VecOp0, *Shift = 0;
DebugLoc dl = N->getDebugLoc();
VecOp0 = CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl, VecVT,
Op0, getRC(MVT::v2i64) );
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(ShiftAmt)) {
unsigned bytes = unsigned(CN->getZExtValue()) >> 3;
unsigned bits = unsigned(CN->getZExtValue()) & 7;
if (bytes > 0) {
Shift =
CurDAG->getMachineNode(SPU::ROTQMBYIv2i64, dl, VecVT,
SDValue(VecOp0, 0),
CurDAG->getTargetConstant(bytes, ShiftAmtVT));
}
if (bits > 0) {
Shift =
CurDAG->getMachineNode(SPU::ROTQMBIIv2i64, dl, VecVT,
SDValue((Shift != 0 ? Shift : VecOp0), 0),
CurDAG->getTargetConstant(bits, ShiftAmtVT));
}
} else {
SDNode *Bytes =
CurDAG->getMachineNode(SPU::ROTMIr32, dl, ShiftAmtVT,
ShiftAmt,
CurDAG->getTargetConstant(3, ShiftAmtVT));
SDNode *Bits =
CurDAG->getMachineNode(SPU::ANDIr32, dl, ShiftAmtVT,
ShiftAmt,
CurDAG->getTargetConstant(7, ShiftAmtVT));
// Ensure that the shift amounts are negated!
Bytes = CurDAG->getMachineNode(SPU::SFIr32, dl, ShiftAmtVT,
SDValue(Bytes, 0),
CurDAG->getTargetConstant(0, ShiftAmtVT));
Bits = CurDAG->getMachineNode(SPU::SFIr32, dl, ShiftAmtVT,
SDValue(Bits, 0),
CurDAG->getTargetConstant(0, ShiftAmtVT));
Shift =
CurDAG->getMachineNode(SPU::ROTQMBYv2i64, dl, VecVT,
SDValue(VecOp0, 0), SDValue(Bytes, 0));
Shift =
CurDAG->getMachineNode(SPU::ROTQMBIv2i64, dl, VecVT,
SDValue(Shift, 0), SDValue(Bits, 0));
}
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
OpVT, SDValue(Shift, 0), getRC(MVT::i64));
}
/*!
* Emit the instruction sequence for i64 arithmetic right shifts.
*
* @param Op The shl operand
* @param OpVT Op's machine value value type (doesn't need to be passed, but
* makes life easier.)
* @return The SDNode with the entire instruction sequence
*/
SDNode *
SPUDAGToDAGISel::SelectSRAi64(SDNode *N, EVT OpVT) {
// Promote Op0 to vector
EVT VecVT = EVT::getVectorVT(*CurDAG->getContext(),
OpVT, (128 / OpVT.getSizeInBits()));
SDValue ShiftAmt = N->getOperand(1);
EVT ShiftAmtVT = ShiftAmt.getValueType();
DebugLoc dl = N->getDebugLoc();
SDNode *VecOp0 =
CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
VecVT, N->getOperand(0), getRC(MVT::v2i64));
SDValue SignRotAmt = CurDAG->getTargetConstant(31, ShiftAmtVT);
SDNode *SignRot =
CurDAG->getMachineNode(SPU::ROTMAIv2i64_i32, dl, MVT::v2i64,
SDValue(VecOp0, 0), SignRotAmt);
SDNode *UpperHalfSign =
CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
MVT::i32, SDValue(SignRot, 0), getRC(MVT::i32));
SDNode *UpperHalfSignMask =
CurDAG->getMachineNode(SPU::FSM64r32, dl, VecVT, SDValue(UpperHalfSign, 0));
SDNode *UpperLowerMask =
CurDAG->getMachineNode(SPU::FSMBIv2i64, dl, VecVT,
CurDAG->getTargetConstant(0xff00ULL, MVT::i16));
SDNode *UpperLowerSelect =
CurDAG->getMachineNode(SPU::SELBv2i64, dl, VecVT,
SDValue(UpperHalfSignMask, 0),
SDValue(VecOp0, 0),
SDValue(UpperLowerMask, 0));
SDNode *Shift = 0;
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(ShiftAmt)) {
unsigned bytes = unsigned(CN->getZExtValue()) >> 3;
unsigned bits = unsigned(CN->getZExtValue()) & 7;
if (bytes > 0) {
bytes = 31 - bytes;
Shift =
CurDAG->getMachineNode(SPU::ROTQBYIv2i64, dl, VecVT,
SDValue(UpperLowerSelect, 0),
CurDAG->getTargetConstant(bytes, ShiftAmtVT));
}
if (bits > 0) {
bits = 8 - bits;
Shift =
CurDAG->getMachineNode(SPU::ROTQBIIv2i64, dl, VecVT,
SDValue((Shift != 0 ? Shift : UpperLowerSelect), 0),
CurDAG->getTargetConstant(bits, ShiftAmtVT));
}
} else {
SDNode *NegShift =
CurDAG->getMachineNode(SPU::SFIr32, dl, ShiftAmtVT,
ShiftAmt, CurDAG->getTargetConstant(0, ShiftAmtVT));
Shift =
CurDAG->getMachineNode(SPU::ROTQBYBIv2i64_r32, dl, VecVT,
SDValue(UpperLowerSelect, 0), SDValue(NegShift, 0));
Shift =
CurDAG->getMachineNode(SPU::ROTQBIv2i64, dl, VecVT,
SDValue(Shift, 0), SDValue(NegShift, 0));
}
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
OpVT, SDValue(Shift, 0), getRC(MVT::i64));
}
/*!
Do the necessary magic necessary to load a i64 constant
*/
SDNode *SPUDAGToDAGISel::SelectI64Constant(SDNode *N, EVT OpVT,
DebugLoc dl) {
ConstantSDNode *CN = cast<ConstantSDNode>(N);
return SelectI64Constant(CN->getZExtValue(), OpVT, dl);
}
SDNode *SPUDAGToDAGISel::SelectI64Constant(uint64_t Value64, EVT OpVT,
DebugLoc dl) {
EVT OpVecVT = EVT::getVectorVT(*CurDAG->getContext(), OpVT, 2);
SDValue i64vec =
SPU::LowerV2I64Splat(OpVecVT, *CurDAG, Value64, dl);
// Here's where it gets interesting, because we have to parse out the
// subtree handed back in i64vec:
if (i64vec.getOpcode() == ISD::BIT_CONVERT) {
// The degenerate case where the upper and lower bits in the splat are
// identical:
SDValue Op0 = i64vec.getOperand(0);
ReplaceUses(i64vec, Op0);
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl, OpVT,
SDValue(emitBuildVector(Op0.getNode()), 0),
getRC(MVT::i64));
} else if (i64vec.getOpcode() == SPUISD::SHUFB) {
SDValue lhs = i64vec.getOperand(0);
SDValue rhs = i64vec.getOperand(1);
SDValue shufmask = i64vec.getOperand(2);
if (lhs.getOpcode() == ISD::BIT_CONVERT) {
ReplaceUses(lhs, lhs.getOperand(0));
lhs = lhs.getOperand(0);
}
SDNode *lhsNode = (lhs.getNode()->isMachineOpcode()
? lhs.getNode()
: emitBuildVector(lhs.getNode()));
if (rhs.getOpcode() == ISD::BIT_CONVERT) {
ReplaceUses(rhs, rhs.getOperand(0));
rhs = rhs.getOperand(0);
}
SDNode *rhsNode = (rhs.getNode()->isMachineOpcode()
? rhs.getNode()
: emitBuildVector(rhs.getNode()));
if (shufmask.getOpcode() == ISD::BIT_CONVERT) {
ReplaceUses(shufmask, shufmask.getOperand(0));
shufmask = shufmask.getOperand(0);
}
SDNode *shufMaskNode = (shufmask.getNode()->isMachineOpcode()
? shufmask.getNode()
: emitBuildVector(shufmask.getNode()));
SDValue shufNode =
CurDAG->getNode(SPUISD::SHUFB, dl, OpVecVT,
SDValue(lhsNode, 0), SDValue(rhsNode, 0),
SDValue(shufMaskNode, 0));
HandleSDNode Dummy(shufNode);
SDNode *SN = SelectCode(Dummy.getValue().getNode());
if (SN == 0) SN = Dummy.getValue().getNode();
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl,
OpVT, SDValue(SN, 0), getRC(MVT::i64));
} else if (i64vec.getOpcode() == ISD::BUILD_VECTOR) {
return CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, dl, OpVT,
SDValue(emitBuildVector(i64vec.getNode()), 0),
getRC(MVT::i64));
} else {
report_fatal_error("SPUDAGToDAGISel::SelectI64Constant: Unhandled i64vec"
"condition");
}
}
/// createSPUISelDag - This pass converts a legalized DAG into a
/// SPU-specific DAG, ready for instruction scheduling.
///
FunctionPass *llvm::createSPUISelDag(SPUTargetMachine &TM) {
return new SPUDAGToDAGISel(TM);
}
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