template <typename T> struct ilist_traits;
template <typename T> struct ilist;
-typedef short MachineOpCode;
-
//===----------------------------------------------------------------------===//
// class MachineOperand
//
-// Purpose:
// Representation of each machine instruction operand.
-// This class is designed so that you can allocate a vector of operands
-// first and initialize each one later.
-//
-// E.g, for this VM instruction:
-// ptr = alloca type, numElements
-// we generate 2 machine instructions on the SPARC:
-//
-// mul Constant, Numelements -> Reg
-// add %sp, Reg -> Ptr
-//
-// Each instruction has 3 operands, listed above. Of those:
-// - Reg, NumElements, and Ptr are of operand type MO_Register.
-// - Constant is of operand type MO_SignExtendedImmed on the SPARC.
-//
-// For the register operands, the virtual register type is as follows:
-//
-// - Reg will be of virtual register type MO_MInstrVirtualReg. The field
-// MachineInstr* minstr will point to the instruction that computes reg.
-//
-// - %sp will be of virtual register type MO_MachineReg.
-// The field regNum identifies the machine register.
-//
-// - NumElements will be of virtual register type MO_VirtualReg.
-// The field Value* value identifies the value.
//
-// - Ptr will also be of virtual register type MO_VirtualReg.
-// Again, the field Value* value identifies the value.
-//
-//===----------------------------------------------------------------------===//
-
struct MachineOperand {
private:
// 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
- HIFLAG32 = 0x04, // operand is %hi32(value_or_immedVal)
- LOFLAG32 = 0x08, // operand is %lo32(value_or_immedVal)
- HIFLAG64 = 0x10, // operand is %hi64(value_or_immedVal)
- LOFLAG64 = 0x20, // operand is %lo64(value_or_immedVal)
- PCRELATIVE = 0x40 // Operand is relative to PC, not a global address
+ USEFLAG = 0x02 // this is a use of the operand
};
public:
};
enum MachineOperandType {
- MO_VirtualRegister, // virtual register for *value
- MO_MachineRegister, // pre-assigned machine register `regNum'
- MO_SignExtendedImmed,
- MO_UnextendedImmed,
+ MO_Register, // Register operand.
+ MO_Immediate, // Immediate Operand
MO_MachineBasicBlock, // MachineBasicBlock reference
MO_FrameIndex, // Abstract Stack Frame Index
MO_ConstantPoolIndex, // Address of indexed Constant in Constant Pool
private:
union {
- Value* value; // BasicBlockVal for a label operand.
- // ConstantVal for a non-address immediate.
- // Virtual register for an SSA operand,
- // including hidden operands required for
- // the generated machine code.
- // 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
- // will be set for a value after reg allocation
-
- int offset; // Offset to address of global or external, only
- // valid for MO_GlobalAddress, MO_ExternalSym
- // and MO_ConstantPoolIndex
- } extra;
-
- void zeroContents () {
- memset (&contents, 0, sizeof (contents));
- memset (&extra, 0, sizeof (extra));
- }
-
- MachineOperand(int64_t ImmVal = 0,
- MachineOperandType OpTy = MO_VirtualRegister, int Offset = 0)
- : flags(0), opType(OpTy) {
- zeroContents ();
- contents.immedVal = ImmVal;
- if (OpTy == MachineOperand::MO_ConstantPoolIndex)
- extra.offset = Offset;
- else
- extra.regNum = -1;
- }
-
- MachineOperand(int Reg, MachineOperandType OpTy, UseType UseTy)
- : flags(UseTy), opType(OpTy) {
- zeroContents ();
- extra.regNum = Reg;
- }
-
- MachineOperand(Value *V, MachineOperandType OpTy, UseType UseTy,
- bool isPCRelative = false)
- : flags(UseTy | (isPCRelative?PCRELATIVE:0)), opType(OpTy) {
- assert(OpTy != MachineOperand::MO_GlobalAddress);
- zeroContents();
- contents.value = V;
- extra.regNum = -1;
- }
-
- MachineOperand(GlobalValue *V, MachineOperandType OpTy, UseType UseTy,
- bool isPCRelative = false, int Offset = 0)
- : flags(UseTy | (isPCRelative?PCRELATIVE:0)), opType(OpTy) {
- assert(OpTy == MachineOperand::MO_GlobalAddress);
- zeroContents ();
- contents.value = (Value*)V;
- extra.offset = Offset;
- }
-
- MachineOperand(MachineBasicBlock *mbb)
- : flags(0), opType(MO_MachineBasicBlock) {
- zeroContents ();
- contents.MBB = mbb;
- extra.regNum = -1;
- }
-
- MachineOperand(const char *SymName, bool isPCRelative, int Offset)
- : flags(isPCRelative?PCRELATIVE: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() {}
const MachineOperand &operator=(const MachineOperand &MO) {
contents = MO.contents;
flags = MO.flags;
opType = MO.opType;
- extra = MO.extra;
+ offset = MO.offset;
return *this;
}
///
UseType getUseType() const { return UseType(flags & (USEFLAG|DEFFLAG)); }
- /// isPCRelative - This returns the value of the PCRELATIVE flag, which
- /// indicates whether this operand should be emitted as a PC relative value
- /// instead of a global address. This is used for operands of the forms:
- /// MachineBasicBlock, GlobalAddress, ExternalSymbol
- ///
- bool isPCRelative() const { return (flags & PCRELATIVE) != 0; }
-
- /// isRegister - Return true if this operand is a register operand. The X86
- /// backend currently can't decide whether to use MO_MR or MO_VR to represent
- /// them, so we accept both.
- ///
- /// Note: The sparc backend should not use this method.
- ///
- bool isRegister() const {
- return opType == MO_MachineRegister || opType == MO_VirtualRegister;
- }
-
/// Accessors that tell you what kind of MachineOperand you're looking at.
///
+ bool isReg() const { return opType == MO_Register; }
+ bool isImm() const { return opType == MO_Immediate; }
+ bool isMBB() const { return opType == MO_MachineBasicBlock; }
+
+ bool isRegister() const { return opType == MO_Register; }
+ bool isImmediate() const { return opType == MO_Immediate; }
bool isMachineBasicBlock() const { return opType == MO_MachineBasicBlock; }
- bool isImmediate() const {
- return opType == MO_SignExtendedImmed || opType == MO_UnextendedImmed;
- }
bool isFrameIndex() const { return opType == MO_FrameIndex; }
bool isConstantPoolIndex() const { return opType == MO_ConstantPoolIndex; }
bool isJumpTableIndex() const { return opType == MO_JumpTableIndex; }
bool isGlobalAddress() const { return opType == MO_GlobalAddress; }
bool isExternalSymbol() const { return opType == MO_ExternalSymbol; }
- /// getVRegValueOrNull - Get the Value* out of a MachineOperand if it
- /// has one. This is deprecated and only used by the SPARC v9 backend.
- ///
- Value* getVRegValueOrNull() const {
- return opType == MO_VirtualRegister ? contents.value : NULL;
- }
-
- /// MachineOperand accessors that only work on certain types of
- /// MachineOperand...
- ///
- Value* getVRegValue() const {
- assert(opType == MO_VirtualRegister && "Wrong MachineOperand accessor");
- return contents.value;
- }
- int getMachineRegNum() const {
- assert(opType == MO_MachineRegister && "Wrong MachineOperand accessor");
- return extra.regNum;
+ int64_t getImm() const {
+ assert(isImm() && "Wrong MachineOperand accessor");
+ return contents.immedVal;
}
+
int64_t getImmedValue() const {
- assert(isImmediate() && "Wrong MachineOperand accessor");
+ assert(isImm() && "Wrong MachineOperand accessor");
return contents.immedVal;
}
MachineBasicBlock *getMachineBasicBlock() const {
}
GlobalValue *getGlobal() const {
assert(isGlobalAddress() && "Wrong MachineOperand accessor");
- return (GlobalValue*)contents.value;
+ return contents.GV;
}
int getOffset() const {
assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex()) &&
"Wrong MachineOperand accessor");
- return extra.offset;
+ return offset;
}
const char *getSymbolName() const {
assert(isExternalSymbol() && "Wrong MachineOperand accessor");
/// MachineOperand methods for testing that work on any kind of
/// MachineOperand...
///
- bool isUse () const { return flags & USEFLAG; }
- MachineOperand& setUse () { flags |= USEFLAG; return *this; }
- bool isDef () const { return flags & DEFFLAG; }
- MachineOperand& setDef () { flags |= DEFFLAG; return *this; }
- bool isHiBits32 () const { return flags & HIFLAG32; }
- bool isLoBits32 () const { return flags & LOFLAG32; }
- bool isHiBits64 () const { return flags & HIFLAG64; }
- bool isLoBits64 () const { return flags & LOFLAG64; }
-
- /// hasAllocatedReg - Returns true iff a machine register has been
- /// allocated to this operand.
- ///
- bool hasAllocatedReg() const {
- return (extra.regNum >= 0 &&
- (opType == MO_VirtualRegister || opType == MO_MachineRegister));
- }
+ bool isUse() const { return flags & USEFLAG; }
+ bool isDef() const { return flags & DEFFLAG; }
+ MachineOperand &setUse() { flags |= USEFLAG; return *this; }
+ MachineOperand &setDef() { flags |= DEFFLAG; return *this; }
- /// getReg - Returns the register number. It is a runtime error to call this
- /// if a register is not allocated.
+ /// getReg - Returns the register number.
///
unsigned getReg() const {
- assert(hasAllocatedReg());
- return extra.regNum;
+ assert(isRegister() && "This is not a register operand!");
+ return contents.RegNo;
}
- /// MachineOperand mutators...
+ /// MachineOperand mutators.
///
void setReg(unsigned Reg) {
- // This method's comment used to say: 'TODO: get rid of this duplicate
- // code.' It's not clear where the duplication is.
- assert(hasAllocatedReg() && "This operand cannot have a register number!");
- extra.regNum = Reg;
+ assert(isRegister() && "This is not a register operand!");
+ contents.RegNo = Reg;
}
- void setValueReg(Value *val) {
- assert(getVRegValueOrNull() != 0 && "Original operand must of type Value*");
- contents.value = val;
+ void setImmedValue(int64_t immVal) {
+ assert(isImm() && "Wrong MachineOperand mutator");
+ contents.immedVal = immVal;
}
-
- void setImmedValue(int immVal) {
- assert(isImmediate() && "Wrong MachineOperand mutator");
+ void setImm(int64_t immVal) {
+ assert(isImm() && "Wrong MachineOperand mutator");
contents.immedVal = 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 specified value. If an operand is known to be an immediate already,
+ /// the setImmedValue method should be used.
+ void ChangeToImmediate(int64_t ImmVal) {
+ opType = MO_Immediate;
+ contents.immedVal = ImmVal;
+ }
+
+ /// ChangeToRegister - Replace this operand with a new register operand of
+ /// the specified value. If an operand is known to be an register already,
+ /// the setReg method should be used.
+ void ChangeToRegister(unsigned Reg) {
+ opType = MO_Register;
+ 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 reserve's space for numOperand
+ /// operands.
MachineInstr(short Opcode, unsigned numOperands);
- /// 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 - Work exactly the same as the ctor above, except that
/// the MachineInstr is created and added to the end of the specified basic
/// block.
/// 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 MO_VirtualRegister operand to the end of the
- /// operands list...
- ///
- void addRegOperand(Value *V, bool isDef, bool isDefAndUse=false) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(V, MachineOperand::MO_VirtualRegister,
- !isDef ? MachineOperand::Use :
- (isDefAndUse ? MachineOperand::UseAndDef :
- MachineOperand::Def)));
- }
-
- void addRegOperand(Value *V,
- MachineOperand::UseType UTy = MachineOperand::Use,
- bool isPCRelative = false) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(MachineOperand(V, MachineOperand::MO_VirtualRegister,
- UTy, isPCRelative));
- }
-
- /// addRegOperand - Add a symbolic virtual register reference...
+ /// addRegOperand - Add a register operand.
///
- void addRegOperand(int reg, bool isDef) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(reg, MachineOperand::MO_VirtualRegister,
- isDef ? MachineOperand::Def : MachineOperand::Use));
- }
-
- /// addRegOperand - Add a symbolic virtual register reference...
- ///
- 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_VirtualRegister, UTy));
- }
-
- /// addMachineRegOperand - Add a virtual register operand to this MachineInstr
- ///
- void addMachineRegOperand(int reg, bool isDef) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(reg, MachineOperand::MO_MachineRegister,
- isDef ? MachineOperand::Def : MachineOperand::Use));
- }
-
- /// addMachineRegOperand - Add a virtual register operand to this MachineInstr
- ///
- void addMachineRegOperand(int 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_MachineRegister, UTy));
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_Register;
+ Op.flags = UTy;
+ Op.contents.RegNo = Reg;
+ Op.offset = 0;
}
- /// addZeroExtImmOperand - Add a zero extended constant argument to the
+ /// addImmOperand - Add a zero extended constant argument to the
/// machine instruction.
///
- void addZeroExtImmOperand(int intValue) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(intValue, MachineOperand::MO_UnextendedImmed));
- }
-
- /// addZeroExtImm64Operand - Add a zero extended 64-bit constant argument
- /// to the machine instruction.
- ///
- void addZeroExtImm64Operand(uint64_t intValue) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(intValue, MachineOperand::MO_UnextendedImmed));
- }
-
- /// addSignExtImmOperand - Add a zero extended constant argument to the
- /// machine instruction.
- ///
- void addSignExtImmOperand(int intValue) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(intValue, MachineOperand::MO_SignExtendedImmed));
+ void addImmOperand(int64_t 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, bool isPCRelative, int Offset) {
- assert(!OperandsComplete() &&
- "Trying to add an operand to a machine instr that is already done!");
- operands.push_back(
- MachineOperand(GV, MachineOperand::MO_GlobalAddress,
- MachineOperand::Use, isPCRelative, Offset));
+ void addGlobalAddressOperand(GlobalValue *GV, int 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, bool isPCRelative) {
- operands.push_back(MachineOperand(SymName, isPCRelative, 0));
+ void addExternalSymbolOperand(const char *SymName) {
+ MachineOperand &Op = AddNewOperand();
+ Op.opType = MachineOperand::MO_ExternalSymbol;
+ Op.flags = 0;
+ Op.contents.SymbolName = SymName;
+ Op.offset = 0;
}
//===--------------------------------------------------------------------===//
// Accessors used to modify instructions in place.
//
- // FIXME: Move this stuff to MachineOperand itself!
/// setOpcode - Replace the opcode of the current instruction with a new one.
///
/// 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();
}
-
- // Access to set the operands when building the machine instruction
- //
- void SetMachineOperandVal(unsigned i,
- MachineOperand::MachineOperandType operandType,
- Value* V);
-
- void SetMachineOperandConst(unsigned i,
- MachineOperand::MachineOperandType operandType,
- int intValue);
-
- void SetMachineOperandReg(unsigned i, int regNum);
};
//===----------------------------------------------------------------------===//
projects / oota-llvm.git / blobdiff