-//===- SparcRegisterInfo.cpp - SPARC Register Information -------*- C++ -*-===//
+//===-- SparcRegisterInfo.cpp - SPARC Register Information ----------------===//
//
// 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 SPARC implementation of the MRegisterInfo class.
+// This file contains the SPARC implementation of the TargetRegisterInfo class.
//
//===----------------------------------------------------------------------===//
-#include "Sparc.h"
#include "SparcRegisterInfo.h"
+#include "Sparc.h"
+#include "SparcMachineFunctionInfo.h"
#include "SparcSubtarget.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Type.h"
-#include "llvm/ADT/STLExtras.h"
-#include <iostream>
+
+#define GET_REGINFO_TARGET_DESC
+#include "SparcGenRegisterInfo.inc"
+
using namespace llvm;
+static cl::opt<bool>
+ReserveAppRegisters("sparc-reserve-app-registers", cl::Hidden, cl::init(false),
+ cl::desc("Reserve application registers (%g2-%g4)"));
+
SparcRegisterInfo::SparcRegisterInfo(SparcSubtarget &st,
const TargetInstrInfo &tii)
- : SparcGenRegisterInfo(SP::ADJCALLSTACKDOWN, SP::ADJCALLSTACKUP),
- Subtarget(st), TII(tii) {
-}
-
-void SparcRegisterInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned SrcReg, 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);
- else if (RC == SP::FPRegsRegisterClass)
- BuildMI(MBB, I, TII.get(SP::STFri)).addFrameIndex(FI).addImm(0)
- .addReg(SrcReg);
- else if (RC == SP::DFPRegsRegisterClass)
- BuildMI(MBB, I, TII.get(SP::STDFri)).addFrameIndex(FI).addImm(0)
- .addReg(SrcReg);
- else
- assert(0 && "Can't store this register to stack slot");
+ : SparcGenRegisterInfo(SP::I7), Subtarget(st), TII(tii) {
}
-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");
+const uint16_t* SparcRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF)
+ const {
+ static const uint16_t CalleeSavedRegs[] = { 0 };
+ return CalleeSavedRegs;
}
-void SparcRegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *RC) const {
- if (RC == SP::IntRegsRegisterClass)
- BuildMI(MBB, I, TII.get(SP::ORrr), DestReg).addReg(SP::G0).addReg(SrcReg);
- else if (RC == SP::FPRegsRegisterClass)
- BuildMI(MBB, I, TII.get(SP::FMOVS), DestReg).addReg(SrcReg);
- else if (RC == SP::DFPRegsRegisterClass)
- BuildMI(MBB, I, TII.get(Subtarget.isV9() ? SP::FMOVD : SP::FpMOVD),DestReg)
- .addReg(SrcReg);
- else
- assert (0 && "Can't copy this register");
-}
+BitVector SparcRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+ BitVector Reserved(getNumRegs());
+ // FIXME: G1 reserved for now for large imm generation by frame code.
+ Reserved.set(SP::G1);
-MachineInstr *SparcRegisterInfo::foldMemoryOperand(MachineInstr* MI,
- unsigned OpNum,
- int FI) const {
- 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;
+ // G1-G4 can be used in applications.
+ if (ReserveAppRegisters) {
+ Reserved.set(SP::G2);
+ Reserved.set(SP::G3);
+ Reserved.set(SP::G4);
}
-
- if (NewMI)
- NewMI->copyKillDeadInfo(MI);
- return NewMI;
+ // G5 is not reserved in 64 bit mode.
+ if (!Subtarget.is64Bit())
+ Reserved.set(SP::G5);
+
+ Reserved.set(SP::O6);
+ Reserved.set(SP::I6);
+ Reserved.set(SP::I7);
+ Reserved.set(SP::G0);
+ Reserved.set(SP::G6);
+ Reserved.set(SP::G7);
+ return Reserved;
}
-const unsigned* SparcRegisterInfo::getCalleeSaveRegs() const {
- static const unsigned CalleeSaveRegs[] = { 0 };
- return CalleeSaveRegs;
-}
-
-const TargetRegisterClass* const*
-SparcRegisterInfo::getCalleeSaveRegClasses() const {
- static const TargetRegisterClass * const CalleeSaveRegClasses[] = { 0 };
- return CalleeSaveRegClasses;
-}
-
-
-void SparcRegisterInfo::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- 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);
+const TargetRegisterClass*
+SparcRegisterInfo::getPointerRegClass(const MachineFunction &MF,
+ unsigned Kind) const {
+ return Subtarget.is64Bit() ? &SP::I64RegsRegClass : &SP::IntRegsRegClass;
}
void
-SparcRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II) const {
- unsigned i = 0;
- MachineInstr &MI = *II;
- while (!MI.getOperand(i).isFrameIndex()) {
- ++i;
- assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!");
- }
+SparcRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
+ int SPAdj, unsigned FIOperandNum,
+ RegScavenger *RS) const {
+ assert(SPAdj == 0 && "Unexpected");
- int FrameIndex = MI.getOperand(i).getFrameIndex();
+ MachineInstr &MI = *II;
+ DebugLoc dl = MI.getDebugLoc();
+ int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
// 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();
+ int64_t Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex) +
+ MI.getOperand(FIOperandNum + 1).getImm() +
+ Subtarget.getStackPointerBias();
+ SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
+ unsigned FramePtr = SP::I6;
+ if (FuncInfo->isLeafProc()) {
+ // Use %sp and adjust offset if needed.
+ FramePtr = SP::O6;
+ int stackSize = MF.getFrameInfo()->getStackSize();
+ Offset += (stackSize) ? Subtarget.getAdjustedFrameSize(stackSize) : 0 ;
+ }
// 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);
+ MI.getOperand(FIOperandNum).ChangeToRegister(FramePtr, false);
+ MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset);
} else {
- // Otherwise, emit a G1 = SETHI %hi(offset). FIXME: it would be better to
+ // 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);
+ BuildMI(*MI.getParent(), II, dl, 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);
+ BuildMI(*MI.getParent(), II, dl, TII.get(SP::ADDrr), SP::G1).addReg(SP::G1)
+ .addReg(FramePtr);
// Insert: G1+%lo(offset) into the user.
- MI.getOperand(i).ChangeToRegister(SP::G1, false);
- MI.getOperand(i+1).ChangeToImmediate(Offset & ((1 << 10)-1));
+ MI.getOperand(FIOperandNum).ChangeToRegister(SP::G1, false);
+ MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset & ((1 << 10)-1));
}
}
-void SparcRegisterInfo::
-processFunctionBeforeFrameFinalized(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();
-
- // 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 SparcRegisterInfo::emitEpilogue(MachineFunction &MF,
- MachineBasicBlock &MBB) const {
- MachineBasicBlock::iterator MBBI = prior(MBB.end());
- 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::getFrameRegister(const MachineFunction &MF) const {
+ return SP::I6;
}
-unsigned SparcRegisterInfo::getRARegister() const {
- assert(0 && "What is the return address register");
- return 0;
+unsigned SparcRegisterInfo::getEHExceptionRegister() const {
+ llvm_unreachable("What is the exception register");
}
-unsigned SparcRegisterInfo::getFrameRegister(MachineFunction &MF) const {
- assert(0 && "What is the frame register");
- return SP::G1;
+unsigned SparcRegisterInfo::getEHHandlerRegister() const {
+ llvm_unreachable("What is the exception handler register");
}
-
-#include "SparcGenRegisterInfo.inc"
-
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