mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 04:29:21 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22697 91177308-0d34-0410-b5e6-96231b3b80d8
200 lines
6.8 KiB
C++
200 lines
6.8 KiB
C++
//===-- llvm/Instruction.h - Instruction class definition -------*- 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 declaration of the Instruction class, which is the
|
|
// base class for all of the LLVM instructions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_INSTRUCTION_H
|
|
#define LLVM_INSTRUCTION_H
|
|
|
|
#include "llvm/User.h"
|
|
|
|
namespace llvm {
|
|
|
|
struct AssemblyAnnotationWriter;
|
|
class BinaryOperator;
|
|
|
|
template<typename SC> struct ilist_traits;
|
|
template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
|
|
typename SubClass> class SymbolTableListTraits;
|
|
|
|
class Instruction : public User {
|
|
BasicBlock *Parent;
|
|
Instruction *Prev, *Next; // Next and Prev links for our intrusive linked list
|
|
|
|
void setNext(Instruction *N) { Next = N; }
|
|
void setPrev(Instruction *N) { Prev = N; }
|
|
|
|
friend class SymbolTableListTraits<Instruction, BasicBlock, Function,
|
|
ilist_traits<Instruction> >;
|
|
void setParent(BasicBlock *P);
|
|
|
|
private:
|
|
// FIXME: This is a dirty hack. Setcc instructions shouldn't encode the CC
|
|
// into the opcode field. When they don't, this will be unneeded.
|
|
void setOpcode(unsigned NewOpcode);
|
|
friend class BinaryOperator;
|
|
protected:
|
|
Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
|
|
const std::string &Name = "",
|
|
Instruction *InsertBefore = 0);
|
|
Instruction(const Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
|
|
const std::string &Name, BasicBlock *InsertAtEnd);
|
|
public:
|
|
|
|
~Instruction() {
|
|
assert(Parent == 0 && "Instruction still linked in the program!");
|
|
}
|
|
|
|
/// mayWriteToMemory - Return true if this instruction may modify memory.
|
|
///
|
|
virtual bool mayWriteToMemory() const { return false; }
|
|
|
|
/// clone() - Create a copy of 'this' instruction that is identical in all
|
|
/// ways except the following:
|
|
/// * The instruction has no parent
|
|
/// * The instruction has no name
|
|
///
|
|
virtual Instruction *clone() const = 0;
|
|
|
|
/// isIdenticalTo - Return true if the specified instruction is exactly
|
|
/// identical to the current one. This means that all operands match and any
|
|
/// extra information (e.g. load is volatile) agree.
|
|
bool isIdenticalTo(Instruction *I) const;
|
|
|
|
|
|
// Accessor methods...
|
|
//
|
|
inline const BasicBlock *getParent() const { return Parent; }
|
|
inline BasicBlock *getParent() { return Parent; }
|
|
|
|
// getNext/Prev - Return the next or previous instruction in the list. The
|
|
// last node in the list is a terminator instruction.
|
|
Instruction *getNext() { return Next; }
|
|
const Instruction *getNext() const { return Next; }
|
|
Instruction *getPrev() { return Prev; }
|
|
const Instruction *getPrev() const { return Prev; }
|
|
|
|
/// removeFromParent - This method unlinks 'this' from the containing basic
|
|
/// block, but does not delete it.
|
|
///
|
|
void removeFromParent();
|
|
|
|
/// eraseFromParent - This method unlinks 'this' from the containing basic
|
|
/// block and deletes it.
|
|
///
|
|
void eraseFromParent();
|
|
|
|
/// moveBefore - Unlink this instruction from its current basic block and
|
|
/// insert it into the basic block that MovePos lives in, right before
|
|
/// MovePos.
|
|
void moveBefore(Instruction *MovePos);
|
|
|
|
// ---------------------------------------------------------------------------
|
|
/// Subclass classification... getOpcode() returns a member of
|
|
/// one of the enums that is coming soon (down below)...
|
|
///
|
|
unsigned getOpcode() const { return getValueType() - InstructionVal; }
|
|
virtual const char *getOpcodeName() const {
|
|
return getOpcodeName(getOpcode());
|
|
}
|
|
static const char* getOpcodeName(unsigned OpCode);
|
|
|
|
static inline bool isTerminator(unsigned OpCode) {
|
|
return OpCode >= TermOpsBegin && OpCode < TermOpsEnd;
|
|
}
|
|
|
|
inline bool isTerminator() const { // Instance of TerminatorInst?
|
|
return isTerminator(getOpcode());
|
|
}
|
|
|
|
inline bool isBinaryOp() const {
|
|
return getOpcode() >= BinaryOpsBegin && getOpcode() < BinaryOpsEnd;
|
|
}
|
|
|
|
/// isAssociative - Return true if the instruction is associative:
|
|
///
|
|
/// Associative operators satisfy: x op (y op z) === (x op y) op z
|
|
///
|
|
/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when
|
|
/// not applied to floating point types.
|
|
///
|
|
bool isAssociative() const { return isAssociative(getOpcode(), getType()); }
|
|
static bool isAssociative(unsigned op, const Type *Ty);
|
|
|
|
/// isCommutative - Return true if the instruction is commutative:
|
|
///
|
|
/// Commutative operators satisfy: (x op y) === (y op x)
|
|
///
|
|
/// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
|
|
/// applied to any type.
|
|
///
|
|
bool isCommutative() const { return isCommutative(getOpcode()); }
|
|
static bool isCommutative(unsigned op);
|
|
|
|
/// isRelational - Return true if the instruction is a Set* instruction:
|
|
///
|
|
bool isRelational() const { return isRelational(getOpcode()); }
|
|
static bool isRelational(unsigned op);
|
|
|
|
|
|
/// isTrappingInstruction - Return true if the instruction may trap.
|
|
///
|
|
bool isTrapping() const {
|
|
return isTrapping(getOpcode());
|
|
}
|
|
static bool isTrapping(unsigned op);
|
|
|
|
virtual void print(std::ostream &OS) const { print(OS, 0); }
|
|
void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
|
|
|
|
/// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const Instruction *I) { return true; }
|
|
static inline bool classof(const Value *V) {
|
|
return V->getValueType() >= Value::InstructionVal;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Exported enumerations...
|
|
//
|
|
enum TermOps { // These terminate basic blocks
|
|
#define FIRST_TERM_INST(N) TermOpsBegin = N,
|
|
#define HANDLE_TERM_INST(N, OPC, CLASS) OPC = N,
|
|
#define LAST_TERM_INST(N) TermOpsEnd = N+1
|
|
#include "llvm/Instruction.def"
|
|
};
|
|
|
|
enum BinaryOps {
|
|
#define FIRST_BINARY_INST(N) BinaryOpsBegin = N,
|
|
#define HANDLE_BINARY_INST(N, OPC, CLASS) OPC = N,
|
|
#define LAST_BINARY_INST(N) BinaryOpsEnd = N+1
|
|
#include "llvm/Instruction.def"
|
|
};
|
|
|
|
enum MemoryOps {
|
|
#define FIRST_MEMORY_INST(N) MemoryOpsBegin = N,
|
|
#define HANDLE_MEMORY_INST(N, OPC, CLASS) OPC = N,
|
|
#define LAST_MEMORY_INST(N) MemoryOpsEnd = N+1
|
|
#include "llvm/Instruction.def"
|
|
};
|
|
|
|
enum OtherOps {
|
|
#define FIRST_OTHER_INST(N) OtherOpsBegin = N,
|
|
#define HANDLE_OTHER_INST(N, OPC, CLASS) OPC = N,
|
|
#define LAST_OTHER_INST(N) OtherOpsEnd = N+1
|
|
#include "llvm/Instruction.def"
|
|
};
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|