#ifndef LLVM_CODEGEN_MACHINEOPERAND_H
#define LLVM_CODEGEN_MACHINEOPERAND_H
-#include "llvm/ADT/Hashing.h"
#include "llvm/Support/DataTypes.h"
#include <cassert>
class MDNode;
class TargetMachine;
class TargetRegisterInfo;
+class hash_code;
class raw_ostream;
class MCSymbol;
/// MachineOperand class - Representation of each machine instruction operand.
///
+/// This class isn't a POD type because it has a private constructor, but its
+/// destructor must be trivial. Functions like MachineInstr::addOperand(),
+/// MachineRegisterInfo::moveOperands(), and MF::DeleteMachineInstr() depend on
+/// not having to call the MachineOperand destructor.
+///
class MachineOperand {
public:
enum MachineOperandType {
/// union.
unsigned char OpKind; // MachineOperandType
- /// SubReg - Subregister number, only valid for MO_Register. A value of 0
- /// indicates the MO_Register has no subReg.
- unsigned char SubReg;
+ /// Subregister number for MO_Register. A value of 0 indicates the
+ /// MO_Register has no subReg.
+ ///
+ /// For all other kinds of operands, this field holds target-specific flags.
+ unsigned SubReg_TargetFlags : 12;
- /// TargetFlags - This is a set of target-specific operand flags.
- unsigned char TargetFlags;
+ /// TiedTo - Non-zero when this register operand is tied to another register
+ /// operand. The encoding of this field is described in the block comment
+ /// before MachineInstr::tieOperands().
+ unsigned char TiedTo : 4;
/// IsDef/IsImp/IsKill/IsDead flags - These are only valid for MO_Register
/// operands.
struct { // For MO_Register.
// Register number is in SmallContents.RegNo.
- MachineOperand **Prev; // Access list for register.
+ MachineOperand *Prev; // Access list for register. See MRI.
MachineOperand *Next;
} Reg;
} OffsetedInfo;
} Contents;
- explicit MachineOperand(MachineOperandType K) : OpKind(K), ParentMI(0) {
- TargetFlags = 0;
- }
+ explicit MachineOperand(MachineOperandType K)
+ : OpKind(K), SubReg_TargetFlags(0), ParentMI(0) {}
public:
/// getType - Returns the MachineOperandType for this operand.
///
MachineOperandType getType() const { return (MachineOperandType)OpKind; }
- unsigned char getTargetFlags() const { return TargetFlags; }
- void setTargetFlags(unsigned char F) { TargetFlags = F; }
- void addTargetFlag(unsigned char F) { TargetFlags |= F; }
+ unsigned getTargetFlags() const {
+ return isReg() ? 0 : SubReg_TargetFlags;
+ }
+ void setTargetFlags(unsigned F) {
+ assert(!isReg() && "Register operands can't have target flags");
+ SubReg_TargetFlags = F;
+ assert(SubReg_TargetFlags == F && "Target flags out of range");
+ }
+ void addTargetFlag(unsigned F) {
+ assert(!isReg() && "Register operands can't have target flags");
+ SubReg_TargetFlags |= F;
+ assert((SubReg_TargetFlags & F) && "Target flags out of range");
+ }
/// getParent - Return the instruction that this operand belongs to.
unsigned getSubReg() const {
assert(isReg() && "Wrong MachineOperand accessor");
- return (unsigned)SubReg;
+ return SubReg_TargetFlags;
}
bool isUse() const {
return IsEarlyClobber;
}
+ bool isTied() const {
+ assert(isReg() && "Wrong MachineOperand accessor");
+ return TiedTo;
+ }
+
bool isDebug() const {
assert(isReg() && "Wrong MachineOperand accessor");
return IsDebug;
return !isUndef() && !isInternalRead() && (isUse() || getSubReg());
}
- /// getNextOperandForReg - Return the next MachineOperand in the linked list
- /// of operands that use or define the same register.
- /// Don't call this function directly, see the def-use iterators in
- /// MachineRegisterInfo instead.
- MachineOperand *getNextOperandForReg() const {
- assert(isReg() && "This is not a register operand!");
- return Contents.Reg.Next;
- }
-
//===--------------------------------------------------------------------===//
// Mutators for Register Operands
//===--------------------------------------------------------------------===//
void setSubReg(unsigned subReg) {
assert(isReg() && "Wrong MachineOperand accessor");
- SubReg = (unsigned char)subReg;
+ SubReg_TargetFlags = subReg;
+ assert(SubReg_TargetFlags == subReg && "SubReg out of range");
}
/// substVirtReg - Substitute the current register with the virtual
///
void substPhysReg(unsigned Reg, const TargetRegisterInfo&);
- void setIsUse(bool Val = true) {
- assert(isReg() && "Wrong MachineOperand accessor");
- assert((Val || !isDebug()) && "Marking a debug operation as def");
- IsDef = !Val;
- }
+ void setIsUse(bool Val = true) { setIsDef(!Val); }
- void setIsDef(bool Val = true) {
- assert(isReg() && "Wrong MachineOperand accessor");
- assert((!Val || !isDebug()) && "Marking a debug operation as def");
- IsDef = Val;
- }
+ void setIsDef(bool Val = true);
void setImplicit(bool Val = true) {
assert(isReg() && "Wrong MachineOperand accessor");
}
void setIsDebug(bool Val = true) {
- assert(isReg() && IsDef && "Wrong MachineOperand accessor");
+ assert(isReg() && !IsDef && "Wrong MachineOperand accessor");
IsDebug = Val;
}
int64_t getOffset() const {
assert((isGlobal() || isSymbol() || isCPI() || isTargetIndex() ||
isBlockAddress()) && "Wrong MachineOperand accessor");
- return (int64_t(Contents.OffsetedInfo.OffsetHi) << 32) |
+ return int64_t(uint64_t(Contents.OffsetedInfo.OffsetHi) << 32) |
SmallContents.OffsetLo;
}
Op.IsUndef = isUndef;
Op.IsInternalRead = isInternalRead;
Op.IsEarlyClobber = isEarlyClobber;
+ Op.TiedTo = 0;
Op.IsDebug = isDebug;
Op.SmallContents.RegNo = Reg;
Op.Contents.Reg.Prev = 0;
Op.Contents.Reg.Next = 0;
- Op.SubReg = SubReg;
+ Op.setSubReg(SubReg);
return Op;
}
static MachineOperand CreateMBB(MachineBasicBlock *MBB,
Op.setTargetFlags(TargetFlags);
return Op;
}
- static MachineOperand CreateBA(const BlockAddress *BA,
+ static MachineOperand CreateBA(const BlockAddress *BA, int64_t Offset,
unsigned char TargetFlags = 0) {
MachineOperand Op(MachineOperand::MO_BlockAddress);
Op.Contents.OffsetedInfo.Val.BA = BA;
- Op.setOffset(0); // Offset is always 0.
+ Op.setOffset(Offset);
Op.setTargetFlags(TargetFlags);
return Op;
}
assert(isReg() && "Can only add reg operand to use lists");
return Contents.Reg.Prev != 0;
}
-
- /// AddRegOperandToRegInfo - Add this register operand to the specified
- /// MachineRegisterInfo. If it is null, then the next/prev fields should be
- /// explicitly nulled out.
- void AddRegOperandToRegInfo(MachineRegisterInfo *RegInfo);
-
- /// RemoveRegOperandFromRegInfo - Remove this register operand from the
- /// MachineRegisterInfo it is linked with.
- void RemoveRegOperandFromRegInfo();
};
inline raw_ostream &operator<<(raw_ostream &OS, const MachineOperand& MO) {
return OS;
}
+ // See friend declaration above. This additional declaration is required in
+ // order to compile LLVM with IBM xlC compiler.
+ hash_code hash_value(const MachineOperand &MO);
} // End llvm namespace
#endif
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