//===- SparcV8RegisterInfo.cpp - SparcV8 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 contains the SparcV8 implementation of the MRegisterInfo class.
#include "SparcV8.h"
#include "SparcV8RegisterInfo.h"
+#include "SparcV8Subtarget.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Type.h"
-#include "Support/STLExtras.h"
+#include "llvm/ADT/STLExtras.h"
#include <iostream>
using namespace llvm;
-SparcV8RegisterInfo::SparcV8RegisterInfo()
+SparcV8RegisterInfo::SparcV8RegisterInfo(SparcV8Subtarget &st)
: SparcV8GenRegisterInfo(V8::ADJCALLSTACKDOWN,
- V8::ADJCALLSTACKUP) {}
+ V8::ADJCALLSTACKUP), Subtarget(st) {
+}
-int SparcV8RegisterInfo::
+void SparcV8RegisterInfo::
storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned SrcReg, int FrameIdx) const {
- const TargetRegisterClass *RC = getRegClass(SrcReg);
-
+ unsigned SrcReg, int FI,
+ const TargetRegisterClass *RC) const {
// On the order of operands here: think "[FrameIdx + 0] = SrcReg".
- if (RC == SparcV8::IntRegsRegisterClass)
- BuildMI (MBB, I, V8::ST, 3).addFrameIndex (FrameIdx).addSImm (0)
- .addReg (SrcReg);
- else if (RC == SparcV8::FPRegsRegisterClass)
- BuildMI (MBB, I, V8::STFri, 3).addFrameIndex (FrameIdx).addSImm (0)
- .addReg (SrcReg);
- else if (RC == SparcV8::DFPRegsRegisterClass)
- BuildMI (MBB, I, V8::STDFri, 3).addFrameIndex (FrameIdx).addSImm (0)
- .addReg (SrcReg);
+ if (RC == V8::IntRegsRegisterClass)
+ BuildMI(MBB, I, V8::STri, 3).addFrameIndex(FI).addImm(0).addReg(SrcReg);
+ else if (RC == V8::FPRegsRegisterClass)
+ BuildMI(MBB, I, V8::STFri, 3).addFrameIndex(FI).addImm(0).addReg(SrcReg);
+ else if (RC == V8::DFPRegsRegisterClass)
+ BuildMI(MBB, I, V8::STDFri, 3).addFrameIndex(FI).addImm(0).addReg(SrcReg);
else
- assert (0 && "Can't store this register to stack slot");
- return 1;
+ assert(0 && "Can't store this register to stack slot");
}
-int SparcV8RegisterInfo::
+void SparcV8RegisterInfo::
loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
- unsigned DestReg, int FrameIdx) const {
- const TargetRegisterClass *RC = getRegClass(DestReg);
- if (RC == SparcV8::IntRegsRegisterClass)
- BuildMI (MBB, I, V8::LD, 2, DestReg).addFrameIndex (FrameIdx).addSImm (0);
- else if (RC == SparcV8::FPRegsRegisterClass)
- BuildMI (MBB, I, V8::LDFri, 2, DestReg).addFrameIndex (FrameIdx)
- .addSImm (0);
- else if (RC == SparcV8::DFPRegsRegisterClass)
- BuildMI (MBB, I, V8::LDDFri, 2, DestReg).addFrameIndex (FrameIdx)
- .addSImm (0);
+ unsigned DestReg, int FI,
+ const TargetRegisterClass *RC) const {
+ if (RC == V8::IntRegsRegisterClass)
+ BuildMI(MBB, I, V8::LDri, 2, DestReg).addFrameIndex(FI).addImm(0);
+ else if (RC == V8::FPRegsRegisterClass)
+ BuildMI(MBB, I, V8::LDFri, 2, DestReg).addFrameIndex(FI).addImm (0);
+ else if (RC == V8::DFPRegsRegisterClass)
+ BuildMI(MBB, I, V8::LDDFri, 2, DestReg).addFrameIndex(FI).addImm(0);
else
- assert (0 && "Can't load this register from stack slot");
- return 1;
+ assert(0 && "Can't load this register from stack slot");
}
-int SparcV8RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I,
- unsigned DestReg, unsigned SrcReg,
- const TargetRegisterClass *RC) const {
- if (RC == SparcV8::IntRegsRegisterClass)
- BuildMI (MBB, I, V8::ORrr, 2, DestReg).addReg (V8::G0).addReg (SrcReg);
- else if (RC == SparcV8::FPRegsRegisterClass)
- BuildMI (MBB, I, V8::FMOVS, 1, DestReg).addReg (SrcReg);
+void SparcV8RegisterInfo::copyRegToReg(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned DestReg, unsigned SrcReg,
+ const TargetRegisterClass *RC) const {
+ if (RC == V8::IntRegsRegisterClass)
+ BuildMI(MBB, I, V8::ORrr, 2, DestReg).addReg(V8::G0).addReg(SrcReg);
+ else if (RC == V8::FPRegsRegisterClass)
+ BuildMI(MBB, I, V8::FMOVS, 1, DestReg).addReg(SrcReg);
+ else if (RC == V8::DFPRegsRegisterClass)
+ BuildMI(MBB, I, Subtarget.isV9() ? V8::FMOVD : V8::FpMOVD,
+ 1, DestReg).addReg(SrcReg);
else
assert (0 && "Can't copy this register");
- return 1;
+}
+
+MachineInstr *SparcV8RegisterInfo::foldMemoryOperand(MachineInstr* MI,
+ unsigned OpNum,
+ int FI) const {
+ bool isFloat = false;
+ switch (MI->getOpcode()) {
+ case V8::ORrr:
+ if (MI->getOperand(1).isRegister() && MI->getOperand(1).getReg() == V8::G0&&
+ MI->getOperand(0).isRegister() && MI->getOperand(2).isRegister()) {
+ if (OpNum == 0) // COPY -> STORE
+ return BuildMI(V8::STri, 3).addFrameIndex(FI).addImm(0)
+ .addReg(MI->getOperand(2).getReg());
+ else // COPY -> LOAD
+ return BuildMI(V8::LDri, 2, MI->getOperand(0).getReg())
+ .addFrameIndex(FI).addImm(0);
+ }
+ break;
+ case V8::FMOVS:
+ isFloat = true;
+ // FALLTHROUGH
+ case V8::FMOVD:
+ if (OpNum == 0) // COPY -> STORE
+ return BuildMI(isFloat ? V8::STFri : V8::STDFri, 3)
+ .addFrameIndex(FI).addImm(0).addReg(MI->getOperand(1).getReg());
+ else // COPY -> LOAD
+ return BuildMI(isFloat ? V8::LDFri : V8::LDDFri, 2,
+ MI->getOperand(0).getReg()).addFrameIndex(FI).addImm(0);
+ break;
+ }
+ return 0;
}
void SparcV8RegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- std::cerr
- << "Sorry, I don't know how to eliminate call frame pseudo instrs yet, in\n"
- << __FUNCTION__ << " at " << __FILE__ << ":" << __LINE__ << "\n";
- abort();
+ MachineInstr &MI = *I;
+ int Size = MI.getOperand(0).getImmedValue();
+ if (MI.getOpcode() == V8::ADJCALLSTACKDOWN)
+ Size = -Size;
+ if (Size)
+ BuildMI(MBB, I, V8::ADDri, 2, V8::O6).addReg(V8::O6).addSImm(Size);
+ MBB.erase(I);
}
void
int FrameIndex = MI.getOperand(i).getFrameIndex();
- // Replace frame index with a frame pointer reference
- MI.SetMachineOperandReg (i, V8::FP);
-
// 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();
- // note: Offset < 0
- MI.SetMachineOperandConst (i+1, MachineOperand::MO_SignExtendedImmed, Offset);
+
+ // 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.SetMachineOperandReg(i, V8::I6);
+ MI.SetMachineOperandConst(i+1, MachineOperand::MO_SignExtendedImmed,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, V8::SETHIi, 1, V8::G1).addImm(OffHi);
+ // Emit G1 = G1 + I6
+ BuildMI(*MI.getParent(), II, V8::ADDrr, 2,
+ V8::G1).addReg(V8::G1).addReg(V8::I6);
+ // Insert: G1+%lo(offset) into the user.
+ MI.SetMachineOperandReg(i, V8::I1);
+ MI.SetMachineOperandConst(i+1, MachineOperand::MO_SignExtendedImmed,
+ Offset & ((1 << 10)-1));
+ }
}
void SparcV8RegisterInfo::
// 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:
+ // 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
// Round up to next doubleword boundary -- a double-word boundary
// is required by the ABI.
NumBytes = (NumBytes + 7) & ~7;
- BuildMI(MBB, MBB.begin(), V8::SAVEri, 2,
- V8::SP).addImm(-NumBytes).addReg(V8::SP);
+ NumBytes = -NumBytes;
+
+ if (NumBytes >= -4096) {
+ BuildMI(MBB, MBB.begin(), V8::SAVEri, 2,
+ V8::O6).addImm(NumBytes).addReg(V8::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, V8::SETHIi, 1, V8::G1).addImm(OffHi);
+ // Emit G1 = G1 + I6
+ BuildMI(MBB, InsertPt, V8::ORri, 2, V8::G1)
+ .addReg(V8::G1).addImm(NumBytes & ((1 << 10)-1));
+ BuildMI(MBB, InsertPt, V8::SAVErr, 2,
+ V8::O6).addReg(V8::O6).addReg(V8::G1);
+ }
}
void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
#include "SparcV8GenRegisterInfo.inc"
-const TargetRegisterClass*
-SparcV8RegisterInfo::getRegClassForType(const Type* Ty) const {
- switch (Ty->getTypeID()) {
- case Type::FloatTyID: return &FPRegsInstance;
- case Type::DoubleTyID: return &DFPRegsInstance;
- case Type::LongTyID:
- case Type::ULongTyID: assert(0 && "Long values do not 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;
- }
-}
-
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