-//===- SparcV8RegisterInfo.cpp - SparcV8 Register Information ---*- C++ -*-===//
-//
+//===- SparcRegisterInfo.cpp - SPARC Register Information -------*- C++ -*-===//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group 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.
+//
//===----------------------------------------------------------------------===//
//
-// This file contains the SparcV8 implementation of the MRegisterInfo class.
+// This file contains the SPARC implementation of the MRegisterInfo class.
//
//===----------------------------------------------------------------------===//
-#include "SparcV8.h"
-#include "SparcV8RegisterInfo.h"
+#include "Sparc.h"
+#include "SparcRegisterInfo.h"
+#include "SparcSubtarget.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Type.h"
-#include "Support/STLExtras.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/STLExtras.h"
using namespace llvm;
-SparcV8RegisterInfo::SparcV8RegisterInfo()
- : SparcV8GenRegisterInfo(V8::ADJCALLSTACKDOWN,
- V8::ADJCALLSTACKUP) {}
-
-int SparcV8RegisterInfo::storeRegToStackSlot(
- MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI,
- unsigned SrcReg, int FrameIdx,
- const TargetRegisterClass *RC) const
-{
- abort();
- return -1;
+SparcRegisterInfo::SparcRegisterInfo(SparcSubtarget &st,
+ const TargetInstrInfo &tii)
+ : SparcGenRegisterInfo(SP::ADJCALLSTACKDOWN, SP::ADJCALLSTACKUP),
+ Subtarget(st), TII(tii) {
}
-int SparcV8RegisterInfo::loadRegFromStackSlot(
- MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI,
- unsigned DestReg, int FrameIdx,
- const TargetRegisterClass *RC) const
-{
- abort();
- return -1;
+void SparcRegisterInfo::
+storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+ unsigned SrcReg, bool isKill, int FI,
+ const TargetRegisterClass *RC) const {
+ // On the order of operands here: think "[FrameIdx + 0] = SrcReg".
+ if (RC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::STri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, false, false, isKill);
+ else if (RC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::STFri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, false, false, isKill);
+ else if (RC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::STDFri)).addFrameIndex(FI).addImm(0)
+ .addReg(SrcReg, false, false, isKill);
+ else
+ assert(0 && "Can't store this register to stack slot");
}
-int SparcV8RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator MBBI,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *RC) const {
- abort();
- return -1;
+void SparcRegisterInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
+ bool isKill,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const {
+ unsigned Opc = 0;
+ if (RC == SP::IntRegsRegisterClass)
+ Opc = SP::STri;
+ else if (RC == SP::FPRegsRegisterClass)
+ Opc = SP::STFri;
+ else if (RC == SP::DFPRegsRegisterClass)
+ Opc = SP::STDFri;
+ else
+ assert(0 && "Can't load this register");
+ MachineInstrBuilder MIB = BuildMI(TII.get(Opc));
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isRegister())
+ MIB.addReg(MO.getReg());
+ else if (MO.isImmediate())
+ MIB.addImm(MO.getImmedValue());
+ else
+ MIB.addFrameIndex(MO.getFrameIndex());
+ }
+ MIB.addReg(SrcReg, false, false, isKill);
+ NewMIs.push_back(MIB);
+ return;
+}
+
+void SparcRegisterInfo::
+loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+ unsigned DestReg, int FI,
+ const TargetRegisterClass *RC) const {
+ if (RC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::LDri), DestReg).addFrameIndex(FI).addImm(0);
+ else if (RC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::LDFri), DestReg).addFrameIndex(FI).addImm(0);
+ else if (RC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::LDDFri), DestReg).addFrameIndex(FI).addImm(0);
+ else
+ assert(0 && "Can't load this register from stack slot");
+}
+
+void SparcRegisterInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
+ SmallVectorImpl<MachineOperand> &Addr,
+ const TargetRegisterClass *RC,
+ SmallVectorImpl<MachineInstr*> &NewMIs) const {
+ unsigned Opc = 0;
+ if (RC == SP::IntRegsRegisterClass)
+ Opc = SP::LDri;
+ else if (RC == SP::FPRegsRegisterClass)
+ Opc = SP::LDFri;
+ else if (RC == SP::DFPRegsRegisterClass)
+ Opc = SP::LDDFri;
+ else
+ assert(0 && "Can't load this register");
+ MachineInstrBuilder MIB = BuildMI(TII.get(Opc), DestReg);
+ for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
+ MachineOperand &MO = Addr[i];
+ if (MO.isRegister())
+ MIB.addReg(MO.getReg());
+ else if (MO.isImmediate())
+ MIB.addImm(MO.getImmedValue());
+ else
+ MIB.addFrameIndex(MO.getFrameIndex());
+ }
+ NewMIs.push_back(MIB);
+ return;
+}
+
+void SparcRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *DestRC,
+ const TargetRegisterClass *SrcRC) const {
+ if (DestRC != SrcRC) {
+ cerr << "Not yet supported!";
+ abort();
+ }
+
+ if (DestRC == SP::IntRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::ORrr), DestReg).addReg(SP::G0).addReg(SrcReg);
+ else if (DestRC == SP::FPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(SP::FMOVS), DestReg).addReg(SrcReg);
+ else if (DestRC == SP::DFPRegsRegisterClass)
+ BuildMI(MBB, I, TII.get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg)
+ .addReg(SrcReg);
+ else
+ assert (0 && "Can't copy this register");
+}
+
+void SparcRegisterInfo::reMaterialize(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg,
+ const MachineInstr *Orig) const {
+ MachineInstr *MI = Orig->clone();
+ MI->getOperand(0).setReg(DestReg);
+ MBB.insert(I, MI);
+}
+
+MachineInstr *SparcRegisterInfo::foldMemoryOperand(MachineInstr* MI,
+ SmallVectorImpl<unsigned> &Ops,
+ int FI) const {
+ if (Ops.size() != 1) return NULL;
+
+ unsigned OpNum = Ops[0];
+ bool isFloat = false;
+ MachineInstr *NewMI = NULL;
+ switch (MI->getOpcode()) {
+ case SP::ORrr:
+ if (MI->getOperand(1).isRegister() && MI->getOperand(1).getReg() == SP::G0&&
+ MI->getOperand(0).isRegister() && MI->getOperand(2).isRegister()) {
+ if (OpNum == 0) // COPY -> STORE
+ NewMI = BuildMI(TII.get(SP::STri)).addFrameIndex(FI).addImm(0)
+ .addReg(MI->getOperand(2).getReg());
+ else // COPY -> LOAD
+ NewMI = BuildMI(TII.get(SP::LDri), MI->getOperand(0).getReg())
+ .addFrameIndex(FI).addImm(0);
+ }
+ break;
+ case SP::FMOVS:
+ isFloat = true;
+ // FALLTHROUGH
+ case SP::FMOVD:
+ if (OpNum == 0) // COPY -> STORE
+ NewMI = BuildMI(TII.get(isFloat ? SP::STFri : SP::STDFri))
+ .addFrameIndex(FI).addImm(0).addReg(MI->getOperand(1).getReg());
+ else // COPY -> LOAD
+ NewMI = BuildMI(TII.get(isFloat ? SP::LDFri : SP::LDDFri),
+ MI->getOperand(0).getReg()).addFrameIndex(FI).addImm(0);
+ break;
+ }
+
+ if (NewMI)
+ NewMI->copyKillDeadInfo(MI);
+ return NewMI;
+}
+
+const unsigned* SparcRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+ const {
+ static const unsigned CalleeSavedRegs[] = { 0 };
+ return CalleeSavedRegs;
+}
+
+BitVector SparcRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+ BitVector Reserved(getNumRegs());
+ Reserved.set(SP::G2);
+ Reserved.set(SP::G3);
+ Reserved.set(SP::G4);
+ Reserved.set(SP::O6);
+ Reserved.set(SP::I6);
+ Reserved.set(SP::I7);
+ Reserved.set(SP::G0);
+ Reserved.set(SP::G5);
+ Reserved.set(SP::G6);
+ Reserved.set(SP::G7);
+ return Reserved;
}
-void SparcV8RegisterInfo::
+
+const TargetRegisterClass* const*
+SparcRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
+ static const TargetRegisterClass * const CalleeSavedRegClasses[] = { 0 };
+ return CalleeSavedRegClasses;
+}
+
+bool SparcRegisterInfo::hasFP(const MachineFunction &MF) const {
+ return false;
+}
+
+void SparcRegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- abort();
+ MachineInstr &MI = *I;
+ int Size = MI.getOperand(0).getImmedValue();
+ if (MI.getOpcode() == SP::ADJCALLSTACKDOWN)
+ Size = -Size;
+ if (Size)
+ BuildMI(MBB, I, TII.get(SP::ADDri), SP::O6).addReg(SP::O6).addImm(Size);
+ MBB.erase(I);
}
-void
-SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
- MachineBasicBlock::iterator II) const {
- abort();
+void SparcRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
+ int SPAdj, RegScavenger *RS) const {
+ assert(SPAdj == 0 && "Unexpected");
+
+ unsigned i = 0;
+ MachineInstr &MI = *II;
+ while (!MI.getOperand(i).isFrameIndex()) {
+ ++i;
+ assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
+ }
+
+ int FrameIndex = MI.getOperand(i).getFrameIndex();
+
+ // Addressable stack objects are accessed using neg. offsets from %fp
+ MachineFunction &MF = *MI.getParent()->getParent();
+ int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
+ MI.getOperand(i+1).getImmedValue();
+
+ // Replace frame index with a frame pointer reference.
+ if (Offset >= -4096 && Offset <= 4095) {
+ // If the offset is small enough to fit in the immediate field, directly
+ // encode it.
+ MI.getOperand(i).ChangeToRegister(SP::I6, false);
+ MI.getOperand(i+1).ChangeToImmediate(Offset);
+ } else {
+ // Otherwise, emit a G1 = SETHI %hi(offset). FIXME: it would be better to
+ // scavenge a register here instead of reserving G1 all of the time.
+ unsigned OffHi = (unsigned)Offset >> 10U;
+ BuildMI(*MI.getParent(), II, TII.get(SP::SETHIi), SP::G1).addImm(OffHi);
+ // Emit G1 = G1 + I6
+ BuildMI(*MI.getParent(), II, TII.get(SP::ADDrr), SP::G1).addReg(SP::G1)
+ .addReg(SP::I6);
+ // Insert: G1+%lo(offset) into the user.
+ MI.getOperand(i).ChangeToRegister(SP::G1, false);
+ MI.getOperand(i+1).ChangeToImmediate(Offset & ((1 << 10)-1));
+ }
}
-void SparcV8RegisterInfo::
+void SparcRegisterInfo::
processFunctionBeforeFrameFinalized(MachineFunction &MF) const {}
-void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
+void SparcRegisterInfo::emitPrologue(MachineFunction &MF) const {
MachineBasicBlock &MBB = MF.front();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+
+ // Get the number of bytes to allocate from the FrameInfo
+ int NumBytes = (int) MFI->getStackSize();
- // Eventually this should emit the correct save instruction based on the
- // number of bytes in the frame. For now we just hardcode it.
- BuildMI(MBB, MBB.begin(), V8::SAVEi, 2, V8::SP).addImm(-122).addReg(V8::SP);
+ // Emit the correct save instruction based on the number of bytes in
+ // the frame. Minimum stack frame size according to V8 ABI is:
+ // 16 words for register window spill
+ // 1 word for address of returned aggregate-value
+ // + 6 words for passing parameters on the stack
+ // ----------
+ // 23 words * 4 bytes per word = 92 bytes
+ NumBytes += 92;
+ // Round up to next doubleword boundary -- a double-word boundary
+ // is required by the ABI.
+ NumBytes = (NumBytes + 7) & ~7;
+ NumBytes = -NumBytes;
+
+ if (NumBytes >= -4096) {
+ BuildMI(MBB, MBB.begin(), TII.get(SP::SAVEri),
+ SP::O6).addImm(NumBytes).addReg(SP::O6);
+ } else {
+ MachineBasicBlock::iterator InsertPt = MBB.begin();
+ // Emit this the hard way. This clobbers G1 which we always know is
+ // available here.
+ unsigned OffHi = (unsigned)NumBytes >> 10U;
+ BuildMI(MBB, InsertPt, TII.get(SP::SETHIi), SP::G1).addImm(OffHi);
+ // Emit G1 = G1 + I6
+ BuildMI(MBB, InsertPt, TII.get(SP::ORri), SP::G1)
+ .addReg(SP::G1).addImm(NumBytes & ((1 << 10)-1));
+ BuildMI(MBB, InsertPt, TII.get(SP::SAVErr), SP::O6)
+ .addReg(SP::O6).addReg(SP::G1);
+ }
}
-void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
+void SparcRegisterInfo::emitEpilogue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
MachineBasicBlock::iterator MBBI = prior(MBB.end());
- assert(MBBI->getOpcode() == V8::JMPLi &&
- "Can only put epilog before return instruction!");
- BuildMI(MBB, MBBI, V8::RESTOREi, 2, V8::O0).addImm(0).addReg(V8::L7);
-}
-
-
-#include "SparcV8GenRegisterInfo.inc"
-
-const TargetRegisterClass*
-SparcV8RegisterInfo::getRegClassForType(const Type* Ty) const {
- switch (Ty->getPrimitiveID()) {
- case Type::FloatTyID:
- case Type::DoubleTyID:
- assert(0 && "Floating point registers not supported yet!");
- case Type::LongTyID:
- case Type::ULongTyID: assert(0 && "Long values can't fit in registers!");
- default: assert(0 && "Invalid type to getClass!");
- case Type::BoolTyID:
- case Type::SByteTyID:
- case Type::UByteTyID:
- case Type::ShortTyID:
- case Type::UShortTyID:
- case Type::IntTyID:
- case Type::UIntTyID:
- case Type::PointerTyID: return &IntRegsInstance;
- }
+ assert(MBBI->getOpcode() == SP::RETL &&
+ "Can only put epilog before 'retl' instruction!");
+ BuildMI(MBB, MBBI, TII.get(SP::RESTORErr), SP::G0).addReg(SP::G0)
+ .addReg(SP::G0);
+}
+
+unsigned SparcRegisterInfo::getRARegister() const {
+ assert(0 && "What is the return address register");
+ return 0;
+}
+
+unsigned SparcRegisterInfo::getFrameRegister(MachineFunction &MF) const {
+ assert(0 && "What is the frame register");
+ return SP::G1;
+}
+
+unsigned SparcRegisterInfo::getEHExceptionRegister() const {
+ assert(0 && "What is the exception register");
+ return 0;
}
+unsigned SparcRegisterInfo::getEHHandlerRegister() const {
+ assert(0 && "What is the exception handler register");
+ return 0;
+}
+
+int SparcRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const {
+ assert(0 && "What is the dwarf register number");
+ return -1;
+}
+
+#include "SparcGenRegisterInfo.inc"
+
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