//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Andrew Lenharth and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/SSARegMap.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/Target/TargetOptions.h"
-#include "llvm/ADT/Statistic.h"
#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/GlobalValue.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/raw_ostream.h"
#include <algorithm>
using namespace llvm;
//===--------------------------------------------------------------------===//
/// AlphaDAGToDAGISel - Alpha specific code to select Alpha machine
/// instructions for SelectionDAG operations.
- ///
class AlphaDAGToDAGISel : public SelectionDAGISel {
- AlphaTargetLowering AlphaLowering;
+ static const int64_t IMM_LOW = -32768;
+ static const int64_t IMM_HIGH = 32767;
+ static const int64_t IMM_MULT = 65536;
+ static const int64_t IMM_FULLHIGH = IMM_HIGH + IMM_HIGH * IMM_MULT;
+ static const int64_t IMM_FULLLOW = IMM_LOW + IMM_LOW * IMM_MULT;
+
+ static int64_t get_ldah16(int64_t x) {
+ int64_t y = x / IMM_MULT;
+ if (x % IMM_MULT > IMM_HIGH)
+ ++y;
+ return y;
+ }
+
+ static int64_t get_lda16(int64_t x) {
+ return x - get_ldah16(x) * IMM_MULT;
+ }
- static const int IMM_LOW = -32768;
- static const int IMM_HIGH = 32767;
- static const int IMM_MULT = 65536;
+ /// get_zapImm - Return a zap mask if X is a valid immediate for a zapnot
+ /// instruction (if not, return 0). Note that this code accepts partial
+ /// zap masks. For example (and LHS, 1) is a valid zap, as long we know
+ /// that the bits 1-7 of LHS are already zero. If LHS is non-null, we are
+ /// in checking mode. If LHS is null, we assume that the mask has already
+ /// been validated before.
+ uint64_t get_zapImm(SDValue LHS, uint64_t Constant) {
+ uint64_t BitsToCheck = 0;
+ unsigned Result = 0;
+ for (unsigned i = 0; i != 8; ++i) {
+ if (((Constant >> 8*i) & 0xFF) == 0) {
+ // nothing to do.
+ } else {
+ Result |= 1 << i;
+ if (((Constant >> 8*i) & 0xFF) == 0xFF) {
+ // If the entire byte is set, zapnot the byte.
+ } else if (LHS.getNode() == 0) {
+ // Otherwise, if the mask was previously validated, we know its okay
+ // to zapnot this entire byte even though all the bits aren't set.
+ } else {
+ // Otherwise we don't know that the it's okay to zapnot this entire
+ // byte. Only do this iff we can prove that the missing bits are
+ // already null, so the bytezap doesn't need to really null them.
+ BitsToCheck |= ~Constant & (0xFF << 8*i);
+ }
+ }
+ }
+
+ // If there are missing bits in a byte (for example, X & 0xEF00), check to
+ // see if the missing bits (0x1000) are already known zero if not, the zap
+ // isn't okay to do, as it won't clear all the required bits.
+ if (BitsToCheck &&
+ !CurDAG->MaskedValueIsZero(LHS,
+ APInt(LHS.getValueSizeInBits(),
+ BitsToCheck)))
+ return 0;
+
+ return Result;
+ }
+
+ static uint64_t get_zapImm(uint64_t x) {
+ unsigned build = 0;
+ for(int i = 0; i != 8; ++i) {
+ if ((x & 0x00FF) == 0x00FF)
+ build |= 1 << i;
+ else if ((x & 0x00FF) != 0)
+ return 0;
+ x >>= 8;
+ }
+ return build;
+ }
+
+ static uint64_t getNearPower2(uint64_t x) {
+ if (!x) return 0;
+ unsigned at = CountLeadingZeros_64(x);
+ uint64_t complow = 1 << (63 - at);
+ uint64_t comphigh = 1 << (64 - at);
+ //cerr << x << ":" << complow << ":" << comphigh << "\n";
+ if (abs64(complow - x) <= abs64(comphigh - x))
+ return complow;
+ else
+ return comphigh;
+ }
+
+ static bool chkRemNearPower2(uint64_t x, uint64_t r, bool swap) {
+ uint64_t y = getNearPower2(x);
+ if (swap)
+ return (y - x) == r;
+ else
+ return (x - y) == r;
+ }
+
+ static bool isFPZ(SDValue N) {
+ ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N);
+ return (CN && (CN->getValueAPF().isZero()));
+ }
+ static bool isFPZn(SDValue N) {
+ ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N);
+ return (CN && CN->getValueAPF().isNegZero());
+ }
+ static bool isFPZp(SDValue N) {
+ ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N);
+ return (CN && CN->getValueAPF().isPosZero());
+ }
+
public:
- AlphaDAGToDAGISel(TargetMachine &TM)
- : SelectionDAGISel(AlphaLowering), AlphaLowering(TM) {}
+ explicit AlphaDAGToDAGISel(AlphaTargetMachine &TM)
+ : SelectionDAGISel(TM)
+ {}
/// getI64Imm - Return a target constant with the specified value, of type
/// i64.
- inline SDOperand getI64Imm(int64_t Imm) {
+ inline SDValue getI64Imm(int64_t Imm) {
return CurDAG->getTargetConstant(Imm, MVT::i64);
}
// Select - Convert the specified operand from a target-independent to a
// target-specific node if it hasn't already been changed.
- SDOperand Select(SDOperand Op);
+ SDNode *Select(SDNode *N);
- /// InstructionSelectBasicBlock - This callback is invoked by
+ /// InstructionSelect - This callback is invoked by
/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
- virtual void InstructionSelectBasicBlock(SelectionDAG &DAG);
+ virtual void InstructionSelect();
virtual const char *getPassName() const {
return "Alpha DAG->DAG Pattern Instruction Selection";
}
+ /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
+ /// inline asm expressions.
+ virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
+ char ConstraintCode,
+ std::vector<SDValue> &OutOps) {
+ SDValue Op0;
+ switch (ConstraintCode) {
+ default: return true;
+ case 'm': // memory
+ Op0 = Op;
+ break;
+ }
+
+ OutOps.push_back(Op0);
+ return false;
+ }
+
// Include the pieces autogenerated from the target description.
#include "AlphaGenDAGISel.inc"
private:
- SDOperand getGlobalBaseReg();
- SDOperand getRASaveReg();
- SDOperand SelectCALL(SDOperand Op);
+ /// getTargetMachine - Return a reference to the TargetMachine, casted
+ /// to the target-specific type.
+ const AlphaTargetMachine &getTargetMachine() {
+ return static_cast<const AlphaTargetMachine &>(TM);
+ }
+
+ /// getInstrInfo - Return a reference to the TargetInstrInfo, casted
+ /// to the target-specific type.
+ const AlphaInstrInfo *getInstrInfo() {
+ return getTargetMachine().getInstrInfo();
+ }
+
+ SDNode *getGlobalBaseReg();
+ SDNode *getGlobalRetAddr();
+ void SelectCALL(SDNode *Op);
};
}
/// getGlobalBaseReg - Output the instructions required to put the
/// GOT address into a register.
///
-SDOperand AlphaDAGToDAGISel::getGlobalBaseReg() {
- return CurDAG->getCopyFromReg(CurDAG->getEntryNode(),
- AlphaLowering.getVRegGP(),
- MVT::i64);
+SDNode *AlphaDAGToDAGISel::getGlobalBaseReg() {
+ unsigned GlobalBaseReg = getInstrInfo()->getGlobalBaseReg(MF);
+ return CurDAG->getRegister(GlobalBaseReg, TLI.getPointerTy()).getNode();
}
-/// getRASaveReg - Grab the return address
+/// getGlobalRetAddr - Grab the return address.
///
-SDOperand AlphaDAGToDAGISel::getRASaveReg() {
- return CurDAG->getCopyFromReg(CurDAG->getEntryNode(),
- AlphaLowering.getVRegRA(),
- MVT::i64);
+SDNode *AlphaDAGToDAGISel::getGlobalRetAddr() {
+ unsigned GlobalRetAddr = getInstrInfo()->getGlobalRetAddr(MF);
+ return CurDAG->getRegister(GlobalRetAddr, TLI.getPointerTy()).getNode();
}
-/// InstructionSelectBasicBlock - This callback is invoked by
+/// InstructionSelect - This callback is invoked by
/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
-void AlphaDAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
- DEBUG(BB->dump());
-
+void AlphaDAGToDAGISel::InstructionSelect() {
// Select target instructions for the DAG.
- DAG.setRoot(Select(DAG.getRoot()));
- CodeGenMap.clear();
- DAG.RemoveDeadNodes();
-
- // Emit machine code to BB.
- ScheduleAndEmitDAG(DAG);
+ SelectRoot(*CurDAG);
+ CurDAG->RemoveDeadNodes();
}
// Select - Convert the specified operand from a target-independent to a
// target-specific node if it hasn't already been changed.
-SDOperand AlphaDAGToDAGISel::Select(SDOperand Op) {
- SDNode *N = Op.Val;
- if (N->getOpcode() >= ISD::BUILTIN_OP_END &&
- N->getOpcode() < AlphaISD::FIRST_NUMBER)
- return Op; // Already selected.
-
- // If this has already been converted, use it.
- std::map<SDOperand, SDOperand>::iterator CGMI = CodeGenMap.find(Op);
- if (CGMI != CodeGenMap.end()) return CGMI->second;
-
- switch (N->getOpcode()) {
- default: break;
- case ISD::TAILCALL:
- case ISD::CALL: return SelectCALL(Op);
-
- case ISD::DYNAMIC_STACKALLOC: {
- if (!isa<ConstantSDNode>(N->getOperand(2)) ||
- cast<ConstantSDNode>(N->getOperand(2))->getValue() != 0) {
- std::cerr << "Cannot allocate stack object with greater alignment than"
- << " the stack alignment yet!";
- abort();
- }
-
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand Amt = Select(N->getOperand(1));
- SDOperand Reg = CurDAG->getRegister(Alpha::R30, MVT::i64);
- SDOperand Val = CurDAG->getCopyFromReg(Chain, Alpha::R30, MVT::i64);
- Chain = Val.getValue(1);
-
- // Subtract the amount (guaranteed to be a multiple of the stack alignment)
- // from the stack pointer, giving us the result pointer.
- SDOperand Result = CurDAG->getTargetNode(Alpha::SUBQ, MVT::i64, Val, Amt);
-
- // Copy this result back into R30.
- Chain = CurDAG->getNode(ISD::CopyToReg, MVT::Other, Chain, Reg, Result);
-
- // Copy this result back out of R30 to make sure we're not using the stack
- // space without decrementing the stack pointer.
- Result = CurDAG->getCopyFromReg(Chain, Alpha::R30, MVT::i64);
-
- // Finally, replace the DYNAMIC_STACKALLOC with the copyfromreg.
- CodeGenMap[Op.getValue(0)] = Result;
- CodeGenMap[Op.getValue(1)] = Result.getValue(1);
- return SDOperand(Result.Val, Op.ResNo);
- }
- case ISD::BRCOND: {
- if (N->getOperand(1).getOpcode() == ISD::SETCC &&
- MVT::isFloatingPoint(N->getOperand(1).getOperand(0).getValueType())) {
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand CC1 = Select(N->getOperand(1).getOperand(0));
- SDOperand CC2 = Select(N->getOperand(1).getOperand(1));
- ISD::CondCode cCode= cast<CondCodeSDNode>(N->getOperand(1).getOperand(2))->get();
-
- bool rev = false;
- bool isNE = false;
- unsigned Opc = Alpha::WTF;
- switch(cCode) {
- default: N->dump(); assert(0 && "Unknown FP comparison!");
- case ISD::SETEQ: Opc = Alpha::CMPTEQ; break;
- case ISD::SETLT: Opc = Alpha::CMPTLT; break;
- case ISD::SETLE: Opc = Alpha::CMPTLE; break;
- case ISD::SETGT: Opc = Alpha::CMPTLT; rev = true; break;
- case ISD::SETGE: Opc = Alpha::CMPTLE; rev = true; break;
- case ISD::SETNE: Opc = Alpha::CMPTEQ; isNE = true; break;
- };
- SDOperand cmp = CurDAG->getTargetNode(Opc, MVT::f64,
- rev?CC2:CC1,
- rev?CC1:CC2);
-
- MachineBasicBlock *Dest =
- cast<BasicBlockSDNode>(N->getOperand(2))->getBasicBlock();
- if(isNE)
- return CurDAG->SelectNodeTo(N, Alpha::FBEQ, MVT::Other, cmp,
- CurDAG->getBasicBlock(Dest), Chain);
- else
- return CurDAG->SelectNodeTo(N, Alpha::FBNE, MVT::Other, cmp,
- CurDAG->getBasicBlock(Dest), Chain);
- }
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand CC = Select(N->getOperand(1));
- MachineBasicBlock *Dest =
- cast<BasicBlockSDNode>(N->getOperand(2))->getBasicBlock();
- return CurDAG->SelectNodeTo(N, Alpha::BNE, MVT::Other, CC,
- CurDAG->getBasicBlock(Dest), Chain);
+SDNode *AlphaDAGToDAGISel::Select(SDNode *N) {
+ if (N->isMachineOpcode()) {
+ return NULL; // Already selected.
}
- case ISD::LOAD:
- case ISD::EXTLOAD:
- case ISD::ZEXTLOAD:
- case ISD::SEXTLOAD: {
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand Address = Select(N->getOperand(1));
- unsigned opcode = N->getOpcode();
- unsigned Opc = Alpha::WTF;
- if (opcode == ISD::LOAD)
- switch (N->getValueType(0)) {
- default: N->dump(); assert(0 && "Bad load!");
- case MVT::i64: Opc = Alpha::LDQ; break;
- case MVT::f64: Opc = Alpha::LDT; break;
- case MVT::f32: Opc = Alpha::LDS; break;
- }
- else
- switch (cast<VTSDNode>(N->getOperand(3))->getVT()) {
- default: N->dump(); assert(0 && "Bad sign extend!");
- case MVT::i32: Opc = Alpha::LDL;
- assert(opcode != ISD::ZEXTLOAD && "Not sext"); break;
- case MVT::i16: Opc = Alpha::LDWU;
- assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
- case MVT::i1: //FIXME: Treat i1 as i8 since there are problems otherwise
- case MVT::i8: Opc = Alpha::LDBU;
- assert(opcode != ISD::SEXTLOAD && "Not zext"); break;
- }
+ DebugLoc dl = N->getDebugLoc();
- return CurDAG->SelectNodeTo(N, Opc, N->getValueType(0), MVT::Other,
- getI64Imm(0), Address,
- Chain).getValue(Op.ResNo);
- }
- case ISD::STORE:
- case ISD::TRUNCSTORE: {
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand Value = Select(N->getOperand(1));
- SDOperand Address = Select(N->getOperand(2));
-
- unsigned Opc = Alpha::WTF;
-
- if (N->getOpcode() == ISD::STORE) {
- switch (N->getOperand(1).getValueType()) {
- case MVT::i64: Opc = Alpha::STQ; break;
- case MVT::f64: Opc = Alpha::STT; break;
- case MVT::f32: Opc = Alpha::STS; break;
- default: assert(0 && "Bad store!");
- };
- } else { //TRUNCSTORE
- switch (cast<VTSDNode>(N->getOperand(4))->getVT()) {
- case MVT::i32: Opc = Alpha::STL; break;
- case MVT::i16: Opc = Alpha::STW; break;
- case MVT::i8: Opc = Alpha::STB; break;
- default: assert(0 && "Bad truncstore!");
- };
- }
- return CurDAG->SelectNodeTo(N, Opc, MVT::Other, Value, getI64Imm(0),
- Address, Chain);
- }
+ switch (N->getOpcode()) {
+ default: break;
+ case AlphaISD::CALL:
+ SelectCALL(N);
+ return NULL;
- case ISD::BR:
- return CurDAG->SelectNodeTo(N, Alpha::BR_DAG, MVT::Other, N->getOperand(1),
- Select(N->getOperand(0)));
case ISD::FrameIndex: {
int FI = cast<FrameIndexSDNode>(N)->getIndex();
return CurDAG->SelectNodeTo(N, Alpha::LDA, MVT::i64,
CurDAG->getTargetFrameIndex(FI, MVT::i32),
getI64Imm(0));
}
- case ISD::ConstantPool: {
- Constant *C = cast<ConstantPoolSDNode>(N)->get();
- SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i64);
- Tmp = CurDAG->getTargetNode(Alpha::LDAHr, MVT::i64, CPI, getGlobalBaseReg());
- return CurDAG->SelectNodeTo(N, Alpha::LDAr, MVT::i64, CPI, Tmp);
- }
- case ISD::GlobalAddress: {
- GlobalValue *GV = cast<GlobalAddressSDNode>(N)->getGlobal();
- SDOperand GA = CurDAG->getTargetGlobalAddress(GV, MVT::i64);
- return CurDAG->SelectNodeTo(N, Alpha::LDQl, MVT::i64, GA,
- getGlobalBaseReg());
+ case ISD::GLOBAL_OFFSET_TABLE:
+ return getGlobalBaseReg();
+ case AlphaISD::GlobalRetAddr:
+ return getGlobalRetAddr();
+
+ case AlphaISD::DivCall: {
+ SDValue Chain = CurDAG->getEntryNode();
+ SDValue N0 = N->getOperand(0);
+ SDValue N1 = N->getOperand(1);
+ SDValue N2 = N->getOperand(2);
+ Chain = CurDAG->getCopyToReg(Chain, dl, Alpha::R24, N1,
+ SDValue(0,0));
+ Chain = CurDAG->getCopyToReg(Chain, dl, Alpha::R25, N2,
+ Chain.getValue(1));
+ Chain = CurDAG->getCopyToReg(Chain, dl, Alpha::R27, N0,
+ Chain.getValue(1));
+ SDNode *CNode =
+ CurDAG->getMachineNode(Alpha::JSRs, dl, MVT::Other, MVT::Flag,
+ Chain, Chain.getValue(1));
+ Chain = CurDAG->getCopyFromReg(Chain, dl, Alpha::R27, MVT::i64,
+ SDValue(CNode, 1));
+ return CurDAG->SelectNodeTo(N, Alpha::BISr, MVT::i64, Chain, Chain);
}
- case ISD::ExternalSymbol:
- return CurDAG->SelectNodeTo(N, Alpha::LDQl, MVT::i64,
- CurDAG->getTargetExternalSymbol(cast<ExternalSymbolSDNode>(N)->getSymbol(), MVT::i64),
- getGlobalBaseReg());
-
- case ISD::RET: {
- SDOperand Chain = Select(N->getOperand(0)); // Token chain.
- SDOperand InFlag;
-
- if (N->getNumOperands() == 2) {
- SDOperand Val = Select(N->getOperand(1));
- if (N->getOperand(1).getValueType() == MVT::i64) {
- Chain = CurDAG->getCopyToReg(Chain, Alpha::R0, Val, InFlag);
- InFlag = Chain.getValue(1);
- } else if (N->getOperand(1).getValueType() == MVT::f64 ||
- N->getOperand(1).getValueType() == MVT::f32) {
- Chain = CurDAG->getCopyToReg(Chain, Alpha::F0, Val, InFlag);
- InFlag = Chain.getValue(1);
- }
- }
- Chain = CurDAG->getCopyToReg(Chain, Alpha::R26, getRASaveReg(), InFlag);
- InFlag = Chain.getValue(1);
-
- // Finally, select this to a ret instruction.
- return CurDAG->SelectNodeTo(N, Alpha::RETDAG, MVT::Other, Chain, InFlag);
+
+ case ISD::READCYCLECOUNTER: {
+ SDValue Chain = N->getOperand(0);
+ return CurDAG->getMachineNode(Alpha::RPCC, dl, MVT::i64, MVT::Other,
+ Chain);
}
+
case ISD::Constant: {
- int64_t val = (int64_t)cast<ConstantSDNode>(N)->getValue();
- if (val > (int64_t)IMM_HIGH +(int64_t)IMM_HIGH* (int64_t)IMM_MULT ||
- val < (int64_t)IMM_LOW + (int64_t)IMM_LOW * (int64_t)IMM_MULT) {
- MachineConstantPool *CP = BB->getParent()->getConstantPool();
- ConstantUInt *C =
- ConstantUInt::get(Type::getPrimitiveType(Type::ULongTyID) , val);
- SDOperand Tmp, CPI = CurDAG->getTargetConstantPool(C, MVT::i64);
- Tmp = CurDAG->getTargetNode(Alpha::LDAHr, MVT::i64, CPI, getGlobalBaseReg());
- return CurDAG->SelectNodeTo(N, Alpha::LDQr, MVT::i64, CPI, Tmp);
+ uint64_t uval = cast<ConstantSDNode>(N)->getZExtValue();
+
+ if (uval == 0) {
+ SDValue Result = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), dl,
+ Alpha::R31, MVT::i64);
+ ReplaceUses(SDValue(N, 0), Result);
+ return NULL;
}
- break;
+
+ int64_t val = (int64_t)uval;
+ int32_t val32 = (int32_t)val;
+ if (val <= IMM_HIGH + IMM_HIGH * IMM_MULT &&
+ val >= IMM_LOW + IMM_LOW * IMM_MULT)
+ break; //(LDAH (LDA))
+ if ((uval >> 32) == 0 && //empty upper bits
+ val32 <= IMM_HIGH + IMM_HIGH * IMM_MULT)
+ // val32 >= IMM_LOW + IMM_LOW * IMM_MULT) //always true
+ break; //(zext (LDAH (LDA)))
+ //Else use the constant pool
+ ConstantInt *C = ConstantInt::get(
+ Type::getInt64Ty(*CurDAG->getContext()), uval);
+ SDValue CPI = CurDAG->getTargetConstantPool(C, MVT::i64);
+ SDNode *Tmp = CurDAG->getMachineNode(Alpha::LDAHr, dl, MVT::i64, CPI,
+ SDValue(getGlobalBaseReg(), 0));
+ return CurDAG->SelectNodeTo(N, Alpha::LDQr, MVT::i64, MVT::Other,
+ CPI, SDValue(Tmp, 0), CurDAG->getEntryNode());
}
- case ISD::ConstantFP:
- if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(N)) {
- bool isDouble = N->getValueType(0) == MVT::f64;
- MVT::ValueType T = isDouble ? MVT::f64 : MVT::f32;
- if (CN->isExactlyValue(+0.0)) {
- return CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYST : Alpha::CPYSS,
- T, CurDAG->getRegister(Alpha::F31, T),
- CurDAG->getRegister(Alpha::F31, T));
- } else if ( CN->isExactlyValue(-0.0)) {
- return CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYSNT : Alpha::CPYSNS,
- T, CurDAG->getRegister(Alpha::F31, T),
- CurDAG->getRegister(Alpha::F31, T));
- } else {
- abort();
- }
- break;
- }
- case ISD::SDIV:
- case ISD::UDIV:
- case ISD::UREM:
- case ISD::SREM:
- if (MVT::isInteger(N->getValueType(0))) {
- const char* opstr = 0;
- switch(N->getOpcode()) {
- case ISD::UREM: opstr = "__remqu"; break;
- case ISD::SREM: opstr = "__remq"; break;
- case ISD::UDIV: opstr = "__divqu"; break;
- case ISD::SDIV: opstr = "__divq"; break;
- }
- SDOperand Tmp1 = Select(N->getOperand(0)),
- Tmp2 = Select(N->getOperand(1)),
- Addr = Select(CurDAG->getExternalSymbol(opstr,
- AlphaLowering.getPointerTy()));
- SDOperand Chain;
- Chain = CurDAG->getCopyToReg(CurDAG->getEntryNode(), Alpha::R24, Tmp1,
- SDOperand(0,0));
- Chain = CurDAG->getCopyToReg(Chain, Alpha::R25, Tmp2, Chain.getValue(1));
- Chain = CurDAG->getCopyToReg(Chain, Alpha::R27, Addr, Chain.getValue(1));
- Chain = CurDAG->getTargetNode(Alpha::JSRsDAG, MVT::Other, MVT::Flag,
- Chain, Chain.getValue(1));
- return CurDAG->getCopyFromReg(Chain, Alpha::R27, MVT::i64,
- Chain.getValue(1));
+ case ISD::TargetConstantFP:
+ case ISD::ConstantFP: {
+ ConstantFPSDNode *CN = cast<ConstantFPSDNode>(N);
+ bool isDouble = N->getValueType(0) == MVT::f64;
+ EVT T = isDouble ? MVT::f64 : MVT::f32;
+ if (CN->getValueAPF().isPosZero()) {
+ return CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYST : Alpha::CPYSS,
+ T, CurDAG->getRegister(Alpha::F31, T),
+ CurDAG->getRegister(Alpha::F31, T));
+ } else if (CN->getValueAPF().isNegZero()) {
+ return CurDAG->SelectNodeTo(N, isDouble ? Alpha::CPYSNT : Alpha::CPYSNS,
+ T, CurDAG->getRegister(Alpha::F31, T),
+ CurDAG->getRegister(Alpha::F31, T));
+ } else {
+ llvm_report_error("Unhandled FP constant type");
}
break;
+ }
case ISD::SETCC:
- if (MVT::isFloatingPoint(N->getOperand(0).Val->getValueType(0))) {
- unsigned Opc = Alpha::WTF;
+ if (N->getOperand(0).getNode()->getValueType(0).isFloatingPoint()) {
ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
+
+ unsigned Opc = Alpha::WTF;
bool rev = false;
- bool isNE = false;
+ bool inv = false;
switch(CC) {
- default: N->dump(); assert(0 && "Unknown FP comparison!");
- case ISD::SETEQ: Opc = Alpha::CMPTEQ; break;
- case ISD::SETLT: Opc = Alpha::CMPTLT; break;
- case ISD::SETLE: Opc = Alpha::CMPTLE; break;
- case ISD::SETGT: Opc = Alpha::CMPTLT; rev = true; break;
- case ISD::SETGE: Opc = Alpha::CMPTLE; rev = true; break;
- case ISD::SETNE: Opc = Alpha::CMPTEQ; isNE = true; break;
+ default: DEBUG(N->dump(CurDAG)); llvm_unreachable("Unknown FP comparison!");
+ case ISD::SETEQ: case ISD::SETOEQ: case ISD::SETUEQ:
+ Opc = Alpha::CMPTEQ; break;
+ case ISD::SETLT: case ISD::SETOLT: case ISD::SETULT:
+ Opc = Alpha::CMPTLT; break;
+ case ISD::SETLE: case ISD::SETOLE: case ISD::SETULE:
+ Opc = Alpha::CMPTLE; break;
+ case ISD::SETGT: case ISD::SETOGT: case ISD::SETUGT:
+ Opc = Alpha::CMPTLT; rev = true; break;
+ case ISD::SETGE: case ISD::SETOGE: case ISD::SETUGE:
+ Opc = Alpha::CMPTLE; rev = true; break;
+ case ISD::SETNE: case ISD::SETONE: case ISD::SETUNE:
+ Opc = Alpha::CMPTEQ; inv = true; break;
+ case ISD::SETO:
+ Opc = Alpha::CMPTUN; inv = true; break;
+ case ISD::SETUO:
+ Opc = Alpha::CMPTUN; break;
};
- SDOperand tmp1 = Select(N->getOperand(0)),
- tmp2 = Select(N->getOperand(1));
- SDOperand cmp = CurDAG->getTargetNode(Opc, MVT::f64,
- rev?tmp2:tmp1,
- rev?tmp1:tmp2);
- if (isNE)
- cmp = CurDAG->getTargetNode(Alpha::CMPTEQ, MVT::f64, cmp,
- CurDAG->getRegister(Alpha::F31, MVT::f64));
-
- SDOperand LD;
- if (AlphaLowering.hasITOF()) {
- LD = CurDAG->getNode(AlphaISD::FTOIT_, MVT::i64, cmp);
- } else {
- int FrameIdx =
- CurDAG->getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
- SDOperand FI = CurDAG->getFrameIndex(FrameIdx, MVT::i64);
- SDOperand ST = CurDAG->getTargetNode(Alpha::STT, MVT::Other,
- cmp, FI, CurDAG->getRegister(Alpha::R31, MVT::i64));
- LD = CurDAG->getTargetNode(Alpha::LDQ, MVT::i64, FI,
- CurDAG->getRegister(Alpha::R31, MVT::i64),
- ST);
+ SDValue tmp1 = N->getOperand(rev?1:0);
+ SDValue tmp2 = N->getOperand(rev?0:1);
+ SDNode *cmp = CurDAG->getMachineNode(Opc, dl, MVT::f64, tmp1, tmp2);
+ if (inv)
+ cmp = CurDAG->getMachineNode(Alpha::CMPTEQ, dl,
+ MVT::f64, SDValue(cmp, 0),
+ CurDAG->getRegister(Alpha::F31, MVT::f64));
+ switch(CC) {
+ case ISD::SETUEQ: case ISD::SETULT: case ISD::SETULE:
+ case ISD::SETUNE: case ISD::SETUGT: case ISD::SETUGE:
+ {
+ SDNode* cmp2 = CurDAG->getMachineNode(Alpha::CMPTUN, dl, MVT::f64,
+ tmp1, tmp2);
+ cmp = CurDAG->getMachineNode(Alpha::ADDT, dl, MVT::f64,
+ SDValue(cmp2, 0), SDValue(cmp, 0));
+ break;
+ }
+ default: break;
}
- SDOperand FP = CurDAG->getTargetNode(Alpha::CMPULT, MVT::i64,
- CurDAG->getRegister(Alpha::R31, MVT::i64),
- LD);
- return FP;
+
+ SDNode* LD = CurDAG->getMachineNode(Alpha::FTOIT, dl,
+ MVT::i64, SDValue(cmp, 0));
+ return CurDAG->getMachineNode(Alpha::CMPULT, dl, MVT::i64,
+ CurDAG->getRegister(Alpha::R31, MVT::i64),
+ SDValue(LD,0));
}
break;
- case ISD::SELECT:
- if (MVT::isFloatingPoint(N->getValueType(0)) &&
- (N->getOperand(0).getOpcode() != ISD::SETCC ||
- !MVT::isFloatingPoint(N->getOperand(0).getOperand(1).getValueType()))) {
- //This should be the condition not covered by the Patterns
- //FIXME: Don't have SelectCode die, but rather return something testable
- // so that things like this can be caught in fall though code
- //move int to fp
- bool isDouble = N->getValueType(0) == MVT::f64;
- SDOperand LD,
- cond = Select(N->getOperand(0)),
- TV = Select(N->getOperand(1)),
- FV = Select(N->getOperand(2));
+ case ISD::AND: {
+ ConstantSDNode* SC = NULL;
+ ConstantSDNode* MC = NULL;
+ if (N->getOperand(0).getOpcode() == ISD::SRL &&
+ (MC = dyn_cast<ConstantSDNode>(N->getOperand(1))) &&
+ (SC = dyn_cast<ConstantSDNode>(N->getOperand(0).getOperand(1)))) {
+ uint64_t sval = SC->getZExtValue();
+ uint64_t mval = MC->getZExtValue();
+ // If the result is a zap, let the autogened stuff handle it.
+ if (get_zapImm(N->getOperand(0), mval))
+ break;
+ // given mask X, and shift S, we want to see if there is any zap in the
+ // mask if we play around with the botton S bits
+ uint64_t dontcare = (~0ULL) >> (64 - sval);
+ uint64_t mask = mval << sval;
+
+ if (get_zapImm(mask | dontcare))
+ mask = mask | dontcare;
- if (AlphaLowering.hasITOF()) {
- LD = CurDAG->getNode(AlphaISD::ITOFT_, MVT::f64, cond);
- } else {
- int FrameIdx =
- CurDAG->getMachineFunction().getFrameInfo()->CreateStackObject(8, 8);
- SDOperand FI = CurDAG->getFrameIndex(FrameIdx, MVT::i64);
- SDOperand ST = CurDAG->getTargetNode(Alpha::STQ, MVT::Other,
- cond, FI, CurDAG->getRegister(Alpha::R31, MVT::i64));
- LD = CurDAG->getTargetNode(Alpha::LDT, MVT::f64, FI,
- CurDAG->getRegister(Alpha::R31, MVT::i64),
- ST);
+ if (get_zapImm(mask)) {
+ SDValue Z =
+ SDValue(CurDAG->getMachineNode(Alpha::ZAPNOTi, dl, MVT::i64,
+ N->getOperand(0).getOperand(0),
+ getI64Imm(get_zapImm(mask))), 0);
+ return CurDAG->getMachineNode(Alpha::SRLr, dl, MVT::i64, Z,
+ getI64Imm(sval));
}
- SDOperand FP = CurDAG->getTargetNode(isDouble?Alpha::FCMOVNET:Alpha::FCMOVNES,
- MVT::f64, FV, TV, LD);
- return FP;
}
break;
+ }
}
- return SelectCode(Op);
+ return SelectCode(N);
}
-SDOperand AlphaDAGToDAGISel::SelectCALL(SDOperand Op) {
+void AlphaDAGToDAGISel::SelectCALL(SDNode *N) {
//TODO: add flag stuff to prevent nondeturministic breakage!
- SDNode *N = Op.Val;
- SDOperand Chain = Select(N->getOperand(0));
- SDOperand Addr = Select(N->getOperand(1));
- SDOperand InFlag; // Null incoming flag value.
-
- std::vector<SDOperand> CallOperands;
- std::vector<MVT::ValueType> TypeOperands;
-
- //grab the arguments
- for(int i = 2, e = N->getNumOperands(); i < e; ++i) {
- TypeOperands.push_back(N->getOperand(i).getValueType());
- CallOperands.push_back(Select(N->getOperand(i)));
+ SDValue Chain = N->getOperand(0);
+ SDValue Addr = N->getOperand(1);
+ SDValue InFlag = N->getOperand(N->getNumOperands() - 1);
+ DebugLoc dl = N->getDebugLoc();
+
+ if (Addr.getOpcode() == AlphaISD::GPRelLo) {
+ SDValue GOT = SDValue(getGlobalBaseReg(), 0);
+ Chain = CurDAG->getCopyToReg(Chain, dl, Alpha::R29, GOT, InFlag);
+ InFlag = Chain.getValue(1);
+ Chain = SDValue(CurDAG->getMachineNode(Alpha::BSR, dl, MVT::Other,
+ MVT::Flag, Addr.getOperand(0),
+ Chain, InFlag), 0);
+ } else {
+ Chain = CurDAG->getCopyToReg(Chain, dl, Alpha::R27, Addr, InFlag);
+ InFlag = Chain.getValue(1);
+ Chain = SDValue(CurDAG->getMachineNode(Alpha::JSR, dl, MVT::Other,
+ MVT::Flag, Chain, InFlag), 0);
}
- int count = N->getNumOperands() - 2;
-
- static const unsigned args_int[] = {Alpha::R16, Alpha::R17, Alpha::R18,
- Alpha::R19, Alpha::R20, Alpha::R21};
- static const unsigned args_float[] = {Alpha::F16, Alpha::F17, Alpha::F18,
- Alpha::F19, Alpha::F20, Alpha::F21};
-
- for (int i = 6; i < count; ++i) {
- unsigned Opc = Alpha::WTF;
- if (MVT::isInteger(TypeOperands[i])) {
- Opc = Alpha::STQ;
- } else if (TypeOperands[i] == MVT::f32) {
- Opc = Alpha::STS;
- } else if (TypeOperands[i] == MVT::f64) {
- Opc = Alpha::STT;
- } else
- assert(0 && "Unknown operand");
- Chain = CurDAG->getTargetNode(Opc, MVT::Other, CallOperands[i],
- getI64Imm((i - 6) * 8),
- CurDAG->getCopyFromReg(Chain, Alpha::R30, MVT::i64),
- Chain);
- }
- for (int i = 0; i < std::min(6, count); ++i) {
- if (MVT::isInteger(TypeOperands[i])) {
- Chain = CurDAG->getCopyToReg(Chain, args_int[i], CallOperands[i], InFlag);
- InFlag = Chain.getValue(1);
- } else if (TypeOperands[i] == MVT::f32 || TypeOperands[i] == MVT::f64) {
- Chain = CurDAG->getCopyToReg(Chain, args_float[i], CallOperands[i], InFlag);
- InFlag = Chain.getValue(1);
- } else
- assert(0 && "Unknown operand");
- }
-
-
- Chain = CurDAG->getCopyToReg(Chain, Alpha::R27, Addr, InFlag);
- InFlag = Chain.getValue(1);
- // Finally, once everything is in registers to pass to the call, emit the
- // call itself.
- Chain = CurDAG->getTargetNode(Alpha::JSRDAG, MVT::Other, MVT::Flag,
- Chain, InFlag );
InFlag = Chain.getValue(1);
- std::vector<SDOperand> CallResults;
-
- switch (N->getValueType(0)) {
- default: assert(0 && "Unexpected ret value!");
- case MVT::Other: break;
- case MVT::i64:
- Chain = CurDAG->getCopyFromReg(Chain, Alpha::R0, MVT::i64, InFlag).getValue(1);
- CallResults.push_back(Chain.getValue(0));
- break;
- case MVT::f32:
- Chain = CurDAG->getCopyFromReg(Chain, Alpha::F0, MVT::f32, InFlag).getValue(1);
- CallResults.push_back(Chain.getValue(0));
- break;
- case MVT::f64:
- Chain = CurDAG->getCopyFromReg(Chain, Alpha::F0, MVT::f64, InFlag).getValue(1);
- CallResults.push_back(Chain.getValue(0));
- break;
- }
-
- CallResults.push_back(Chain);
- for (unsigned i = 0, e = CallResults.size(); i != e; ++i)
- CodeGenMap[Op.getValue(i)] = CallResults[i];
- return CallResults[Op.ResNo];
+ ReplaceUses(SDValue(N, 0), Chain);
+ ReplaceUses(SDValue(N, 1), InFlag);
}
/// createAlphaISelDag - This pass converts a legalized DAG into a
/// Alpha-specific DAG, ready for instruction scheduling.
///
-FunctionPass *llvm::createAlphaISelDag(TargetMachine &TM) {
+FunctionPass *llvm::createAlphaISelDag(AlphaTargetMachine &TM) {
return new AlphaDAGToDAGISel(TM);
}
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