//===-- 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.
#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;
friend class SymbolTableListTraits<Instruction, BasicBlock, Function,
ilist_traits<Instruction> >;
void setParent(BasicBlock *P);
-protected:
- unsigned iType; // InstructionType: The opcode of the instruction
+ void init();
+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, const std::string &Name = "",
Instruction *InsertBefore = 0);
+ Instruction(const Type *Ty, unsigned iType, const std::string &Name,
+ BasicBlock *InsertAtEnd);
public:
- virtual ~Instruction() {
- assert(Parent == 0 && "Instruction still embedded in basic block!");
+
+ ~Instruction() {
+ assert(Parent == 0 && "Instruction still linked in the program!");
}
// Specialize setName to handle symbol table majik...
virtual void setName(const std::string &name, SymbolTable *ST = 0);
+ /// 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...
//
Instruction *getPrev() { return Prev; }
const Instruction *getPrev() const { return Prev; }
- virtual bool hasSideEffects() const { return false; } // Memory & Call insts
+ /// 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();
// ---------------------------------------------------------------------------
/// Subclass classification... getOpcode() returns a member of
/// one of the enums that is coming soon (down below)...
///
- unsigned getOpcode() const { return iType; }
+ 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 iType >= TermOpsBegin && iType < TermOpsEnd;
+ return isTerminator(getOpcode());
}
+
inline bool isBinaryOp() const {
- return iType >= BinaryOpsBegin && iType < BinaryOpsEnd;
+ 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)
+ /// 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.
/// isCommutative - Return true if the instruction is commutative:
///
- /// Commutative operators satistify: (x op y) === (y op x)
+ /// 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);
+
- virtual void print(std::ostream &OS) const;
+ /// 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;
+ return V->getValueType() >= Value::InstructionVal;
}
//----------------------------------------------------------------------
};
};
+} // End llvm namespace
+
#endif
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