template <typename T> struct ilist_traits;
template <typename T> struct ilist;
-typedef short MachineOpCode;
-
//===----------------------------------------------------------------------===//
// class MachineOperand
//
// Bit fields of the flags variable used for different operand properties
enum {
DEFFLAG = 0x01, // this is a def of the operand
- USEFLAG = 0x02, // this is a use of the operand
+ USEFLAG = 0x02 // this is a use of the operand
};
public:
private:
union {
- GlobalValue *GV; // LLVM global for MO_GlobalAddress.
- int64_t immedVal; // Constant value for an explicit constant
- MachineBasicBlock *MBB; // For MO_MachineBasicBlock type
- const char *SymbolName; // For MO_ExternalSymbol type
+ GlobalValue *GV; // For MO_GlobalAddress.
+ MachineBasicBlock *MBB; // For MO_MachineBasicBlock.
+ const char *SymbolName; // For MO_ExternalSymbol.
+ unsigned RegNo; // For MO_Register.
+ int64_t immedVal; // For MO_Immediate and MO_*Index.
} contents;
char flags; // see bit field definitions above
MachineOperandType opType:8; // Pack into 8 bits efficiently after flags.
- union {
- int regNum; // register number for an explicit register
- int offset; // Offset to address of global or external, only
- // valid for MO_GlobalAddress, MO_ExternalSym
- // and MO_ConstantPoolIndex
- } extra;
-
- void zeroContents() {
- contents.immedVal = 0;
- extra.offset = 0;
- }
-
- MachineOperand(int64_t ImmVal) : flags(0), opType(MO_Immediate) {
- contents.immedVal = ImmVal;
- extra.offset = 0;
- }
-
- MachineOperand(unsigned Idx, MachineOperandType OpTy)
- : flags(0), opType(OpTy) {
- contents.immedVal = Idx;
- extra.offset = 0;
- }
- MachineOperand(int Reg, MachineOperandType OpTy, UseType UseTy)
- : flags(UseTy), opType(OpTy) {
- zeroContents();
- extra.regNum = Reg;
- }
-
- MachineOperand(GlobalValue *V, int Offset = 0)
- : flags(MachineOperand::Use), opType(MachineOperand::MO_GlobalAddress) {
- contents.GV = V;
- extra.offset = Offset;
- }
-
- MachineOperand(MachineBasicBlock *mbb)
- : flags(0), opType(MO_MachineBasicBlock) {
- zeroContents ();
- contents.MBB = mbb;
- }
-
- MachineOperand(const char *SymName, int Offset)
- : flags(0), opType(MO_ExternalSymbol) {
- zeroContents ();
- contents.SymbolName = SymName;
- extra.offset = Offset;
- }
+ /// offset - Offset to address of global or external, only valid for
+ /// MO_GlobalAddress, MO_ExternalSym and MO_ConstantPoolIndex
+ int offset;
+ MachineOperand() {}
public:
- MachineOperand(const MachineOperand &M)
- : flags(M.flags), opType(M.opType) {
- zeroContents ();
- contents = M.contents;
- extra = M.extra;
+ MachineOperand(const MachineOperand &M) {
+ *this = M;
}
~MachineOperand() {}
contents = MO.contents;
flags = MO.flags;
opType = MO.opType;
- extra = MO.extra;
+ offset = MO.offset;
return *this;
}
int getOffset() const {
assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex()) &&
"Wrong MachineOperand accessor");
- return extra.offset;
+ return offset;
}
const char *getSymbolName() const {
assert(isExternalSymbol() && "Wrong MachineOperand accessor");
///
unsigned getReg() const {
assert(isRegister() && "This is not a register operand!");
- return extra.regNum;
+ return contents.RegNo;
}
/// MachineOperand mutators.
///
void setReg(unsigned Reg) {
assert(isRegister() && "This is not a register operand!");
- extra.regNum = Reg;
+ contents.RegNo = Reg;
}
void setImmedValue(int64_t immVal) {
assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex() ||
isJumpTableIndex()) &&
"Wrong MachineOperand accessor");
- extra.offset = Offset;
+ offset = Offset;
}
/// ChangeToImmediate - Replace this operand with a new immediate operand of
/// the setReg method should be used.
void ChangeToRegister(unsigned Reg) {
opType = MO_Register;
- extra.regNum = Reg;
+ contents.RegNo = Reg;
}
friend std::ostream& operator<<(std::ostream& os, const MachineOperand& mop);
//===----------------------------------------------------------------------===//
-// class MachineInstr
-//
-// Purpose:
-// Representation of each machine instruction.
-//
-// MachineOpCode must be an enum, defined separately for each target.
-// E.g., It is defined in SparcInstructionSelection.h for the SPARC.
-//
-// There are 2 kinds of operands:
-//
-// (1) Explicit operands of the machine instruction in vector operands[]
-//
-// (2) "Implicit operands" are values implicitly used or defined by the
-// machine instruction, such as arguments to a CALL, return value of
-// a CALL (if any), and return value of a RETURN.
-//===----------------------------------------------------------------------===//
-
+/// MachineInstr - Representation of each machine instruction.
+///
class MachineInstr {
short Opcode; // the opcode
- std::vector<MachineOperand> operands; // the operands
+ std::vector<MachineOperand> Operands; // the operands
MachineInstr* prev, *next; // links for our intrusive list
MachineBasicBlock* parent; // pointer to the owning basic block
// OperandComplete - Return true if it's illegal to add a new operand
bool OperandsComplete() const;
- //Constructor used by clone() method
MachineInstr(const MachineInstr&);
-
void operator=(const MachineInstr&); // DO NOT IMPLEMENT
// Intrusive list support
friend struct ilist_traits<MachineInstr>;
public:
- /// 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(short Opcode, unsigned numOperands, bool XX, bool YY);
+ /// MachineInstr ctor - This constructor reserve's space for numOperand
+ /// operands.
+ MachineInstr(short Opcode, unsigned numOperands);
/// 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
/// Access to explicit operands of the instruction.
///
- unsigned getNumOperands() const { return operands.size(); }
+ unsigned getNumOperands() const { return Operands.size(); }
const MachineOperand& getOperand(unsigned i) const {
assert(i < getNumOperands() && "getOperand() out of range!");
- return operands[i];
+ return Operands[i];
}
MachineOperand& getOperand(unsigned i) {
assert(i < getNumOperands() && "getOperand() out of range!");
- return operands[i];
+ return Operands[i];
}
/// clone - Create a copy of 'this' instruction that is identical in
/// all ways except the the instruction has no parent, prev, or next.
- MachineInstr* clone() const;
+ MachineInstr* clone() const { return new MachineInstr(*this); }
/// removeFromParent - This method unlinks 'this' from the containing basic
/// block, and returns it, but does not delete it.
friend std::ostream& operator<<(std::ostream& os, const MachineInstr& minstr);
//===--------------------------------------------------------------------===//
- // Accessors to add operands when building up machine instructions
+ // Accessors to add operands when building up machine instructions.
//
- /// addRegOperand - Add a symbolic virtual register reference...
+ /// addRegOperand - Add a register operand.
///
- void addRegOperand(int reg,
+ void addRegOperand(unsigned Reg,
MachineOperand::UseType UTy = MachineOperand::Use) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(reg, MachineOperand::MO_Register, UTy));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_Register;
+ Op.flags = UTy;
+ Op.contents.RegNo = Reg;
+ Op.offset = 0;
}
/// addImmOperand - Add a zero extended constant argument to the
/// machine instruction.
///
void addImmOperand(int64_t Val) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(Val));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_Immediate;
+ Op.flags = 0;
+ Op.contents.immedVal = Val;
+ Op.offset = 0;
}
void addMachineBasicBlockOperand(MachineBasicBlock *MBB) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(MBB));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_MachineBasicBlock;
+ Op.flags = 0;
+ Op.contents.MBB = MBB;
+ Op.offset = 0;
}
/// addFrameIndexOperand - Add an abstract frame index to the instruction
///
void addFrameIndexOperand(unsigned Idx) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(Idx, MachineOperand::MO_FrameIndex));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_FrameIndex;
+ Op.flags = 0;
+ Op.contents.immedVal = Idx;
+ Op.offset = 0;
}
/// addConstantPoolndexOperand - Add a constant pool object index to the
/// instruction.
///
- void addConstantPoolIndexOperand(unsigned I, int Offset=0) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(I, MachineOperand::MO_ConstantPoolIndex));
+ void addConstantPoolIndexOperand(unsigned Idx, int Offset) {
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_ConstantPoolIndex;
+ Op.flags = 0;
+ Op.contents.immedVal = Idx;
+ Op.offset = Offset;
}
/// addJumpTableIndexOperand - Add a jump table object index to the
/// instruction.
///
- void addJumpTableIndexOperand(unsigned I) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(I, MachineOperand::MO_JumpTableIndex));
+ void addJumpTableIndexOperand(unsigned Idx) {
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_JumpTableIndex;
+ Op.flags = 0;
+ Op.contents.immedVal = Idx;
+ Op.offset = 0;
}
void addGlobalAddressOperand(GlobalValue *GV, int Offset) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(GV, Offset));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_GlobalAddress;
+ Op.flags = 0;
+ Op.contents.GV = GV;
+ Op.offset = Offset;
}
/// addExternalSymbolOperand - Add an external symbol operand to this instr
///
void addExternalSymbolOperand(const char *SymName) {
- operands.push_back(MachineOperand(SymName, 0));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_ExternalSymbol;
+ Op.flags = 0;
+ Op.contents.SymbolName = SymName;
+ Op.offset = 0;
}
//===--------------------------------------------------------------------===//
/// fewer operand than it started with.
///
void RemoveOperand(unsigned i) {
- operands.erase(operands.begin()+i);
+ Operands.erase(Operands.begin()+i);
+ }
+private:
+ MachineOperand &AddNewOperand() {
+ assert(!OperandsComplete() &&
+ "Trying to add an operand to a machine instr that is already done!");
+ Operands.push_back(MachineOperand());
+ return Operands.back();
}
};
projects / oota-llvm.git / blobdiff