llvm-6502/lib/CodeGen/MachineInstr.cpp
Evan Cheng 8d3af5e7d0 Instructions with variable operands (variable_ops) can have a number required
operands. e.g.
def CALL32r : I<0xFF, MRM2r, (ops GR32:$dst, variable_ops),
                "call {*}$dst", [(X86call GR32:$dst)]>;
TableGen should emit operand informations for the "required" operands.

Added a target instruction info flag M_VARIABLE_OPS to indicate the target
instruction may have more operands in addition to the minimum required
operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28791 91177308-0d34-0410-b5e6-96231b3b80d8
2006-06-15 07:22:16 +00:00

252 lines
7.7 KiB
C++

//===-- MachineInstr.cpp --------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
//
// Methods common to all machine instructions.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Support/LeakDetector.h"
#include <iostream>
using namespace llvm;
// Global variable holding an array of descriptors for machine instructions.
// The actual object needs to be created separately for each target machine.
// This variable is initialized and reset by class TargetInstrInfo.
//
// FIXME: This should be a property of the target so that more than one target
// at a time can be active...
//
namespace llvm {
extern const TargetInstrDescriptor *TargetInstrDescriptors;
}
/// MachineInstr ctor - This constructor only does a _reserve_ of the operands,
/// not a resize for them. It is expected that if you use this that you call
/// add* methods below to fill up the operands, instead of the Set methods.
/// Eventually, the "resizing" ctors will be phased out.
///
MachineInstr::MachineInstr(short opcode, unsigned numOperands)
: Opcode(opcode), parent(0) {
Operands.reserve(numOperands);
// Make sure that we get added to a machine basicblock
LeakDetector::addGarbageObject(this);
}
/// MachineInstr ctor - Work exactly the same as the ctor above, except that the
/// MachineInstr is created and added to the end of the specified basic block.
///
MachineInstr::MachineInstr(MachineBasicBlock *MBB, short opcode,
unsigned numOperands)
: Opcode(opcode), parent(0) {
assert(MBB && "Cannot use inserting ctor with null basic block!");
Operands.reserve(numOperands);
// Make sure that we get added to a machine basicblock
LeakDetector::addGarbageObject(this);
MBB->push_back(this); // Add instruction to end of basic block!
}
/// MachineInstr ctor - Copies MachineInstr arg exactly
///
MachineInstr::MachineInstr(const MachineInstr &MI) {
Opcode = MI.getOpcode();
Operands.reserve(MI.getNumOperands());
// Add operands
for (unsigned i = 0; i != MI.getNumOperands(); ++i)
Operands.push_back(MI.getOperand(i));
// Set parent, next, and prev to null
parent = 0;
prev = 0;
next = 0;
}
MachineInstr::~MachineInstr() {
LeakDetector::removeGarbageObject(this);
}
/// removeFromParent - This method unlinks 'this' from the containing basic
/// block, and returns it, but does not delete it.
MachineInstr *MachineInstr::removeFromParent() {
assert(getParent() && "Not embedded in a basic block!");
getParent()->remove(this);
return this;
}
/// OperandComplete - Return true if it's illegal to add a new operand
///
bool MachineInstr::OperandsComplete() const {
int NumOperands = TargetInstrDescriptors[Opcode].numOperands;
if ((TargetInstrDescriptors[Opcode].Flags & M_VARIABLE_OPS) == 0 &&
getNumOperands() >= (unsigned)NumOperands)
return true; // Broken: we have all the operands of this instruction!
return false;
}
void MachineInstr::dump() const {
std::cerr << " " << *this;
}
static inline void OutputReg(std::ostream &os, unsigned RegNo,
const MRegisterInfo *MRI = 0) {
if (!RegNo || MRegisterInfo::isPhysicalRegister(RegNo)) {
if (MRI)
os << "%" << MRI->get(RegNo).Name;
else
os << "%mreg(" << RegNo << ")";
} else
os << "%reg" << RegNo;
}
static void print(const MachineOperand &MO, std::ostream &OS,
const TargetMachine *TM) {
const MRegisterInfo *MRI = 0;
if (TM) MRI = TM->getRegisterInfo();
switch (MO.getType()) {
case MachineOperand::MO_Register:
OutputReg(OS, MO.getReg(), MRI);
break;
case MachineOperand::MO_Immediate:
OS << MO.getImmedValue();
break;
case MachineOperand::MO_MachineBasicBlock:
OS << "mbb<"
<< ((Value*)MO.getMachineBasicBlock()->getBasicBlock())->getName()
<< "," << (void*)MO.getMachineBasicBlock() << ">";
break;
case MachineOperand::MO_FrameIndex:
OS << "<fi#" << MO.getFrameIndex() << ">";
break;
case MachineOperand::MO_ConstantPoolIndex:
OS << "<cp#" << MO.getConstantPoolIndex() << ">";
break;
case MachineOperand::MO_JumpTableIndex:
OS << "<jt#" << MO.getJumpTableIndex() << ">";
break;
case MachineOperand::MO_GlobalAddress:
OS << "<ga:" << ((Value*)MO.getGlobal())->getName();
if (MO.getOffset()) OS << "+" << MO.getOffset();
OS << ">";
break;
case MachineOperand::MO_ExternalSymbol:
OS << "<es:" << MO.getSymbolName();
if (MO.getOffset()) OS << "+" << MO.getOffset();
OS << ">";
break;
default:
assert(0 && "Unrecognized operand type");
}
}
void MachineInstr::print(std::ostream &OS, const TargetMachine *TM) const {
unsigned StartOp = 0;
// Specialize printing if op#0 is definition
if (getNumOperands() && getOperand(0).isDef() && !getOperand(0).isUse()) {
::print(getOperand(0), OS, TM);
OS << " = ";
++StartOp; // Don't print this operand again!
}
// Must check if Target machine is not null because machine BB could not
// be attached to a Machine function yet
if (TM)
OS << TM->getInstrInfo()->getName(getOpcode());
for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
const MachineOperand& mop = getOperand(i);
if (i != StartOp)
OS << ",";
OS << " ";
::print(mop, OS, TM);
if (mop.isDef())
if (mop.isUse())
OS << "<def&use>";
else
OS << "<def>";
}
OS << "\n";
}
std::ostream &llvm::operator<<(std::ostream &os, const MachineInstr &MI) {
// If the instruction is embedded into a basic block, we can find the target
// info for the instruction.
if (const MachineBasicBlock *MBB = MI.getParent()) {
const MachineFunction *MF = MBB->getParent();
if (MF)
MI.print(os, &MF->getTarget());
else
MI.print(os, 0);
return os;
}
// Otherwise, print it out in the "raw" format without symbolic register names
// and such.
os << TargetInstrDescriptors[MI.getOpcode()].Name;
for (unsigned i = 0, N = MI.getNumOperands(); i < N; i++) {
os << "\t" << MI.getOperand(i);
if (MI.getOperand(i).isDef())
if (MI.getOperand(i).isUse())
os << "<d&u>";
else
os << "<d>";
}
return os << "\n";
}
std::ostream &llvm::operator<<(std::ostream &OS, const MachineOperand &MO) {
switch (MO.getType()) {
case MachineOperand::MO_Register:
OutputReg(OS, MO.getReg());
break;
case MachineOperand::MO_Immediate:
OS << (long)MO.getImmedValue();
break;
case MachineOperand::MO_MachineBasicBlock:
OS << "<mbb:"
<< ((Value*)MO.getMachineBasicBlock()->getBasicBlock())->getName()
<< "@" << (void*)MO.getMachineBasicBlock() << ">";
break;
case MachineOperand::MO_FrameIndex:
OS << "<fi#" << MO.getFrameIndex() << ">";
break;
case MachineOperand::MO_ConstantPoolIndex:
OS << "<cp#" << MO.getConstantPoolIndex() << ">";
break;
case MachineOperand::MO_JumpTableIndex:
OS << "<jt#" << MO.getJumpTableIndex() << ">";
break;
case MachineOperand::MO_GlobalAddress:
OS << "<ga:" << ((Value*)MO.getGlobal())->getName() << ">";
break;
case MachineOperand::MO_ExternalSymbol:
OS << "<es:" << MO.getSymbolName() << ">";
break;
default:
assert(0 && "Unrecognized operand type");
break;
}
return OS;
}