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//===-- llvm/CodeGen/MachineCodeForInstruction.h -----------------*- C++ -*--=//
//
// Representation of the sequence of machine instructions created
// for a single VM instruction. Additionally records information
// about hidden and implicit values used by the machine instructions:
// about hidden values used by the machine instructions:
//
// "Temporary values" are intermediate values used in the machine
// instruction sequence, but not in the VM instruction
// Note that such values should be treated as pure SSA values with
// no interpretation of their operands (i.e., as a TmpInstruction
// object which actually represents such a value).
//
// (2) "Implicit uses" are values used in the VM instruction but not in
// the machine instruction sequence
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINECODE_FOR_INSTRUCTION_H
#define LLVM_CODEGEN_MACHINECODE_FOR_INSTRUCTION_H
#include "llvm/Annotation.h"
#include <vector>
class MachineInstr;
class Instruction;
class Value;
class MachineCodeForInstruction
: public Annotation, public std::vector<MachineInstr*> {
std::vector<Value*> tempVec; // used by m/c instr but not VM instr
public:
MachineCodeForInstruction();
~MachineCodeForInstruction();
static MachineCodeForInstruction &get(const Instruction *I);
static void destroy(const Instruction *I);
// dropAllReferences() - This function drops all references within
// temporary (hidden) instructions created in implementing the original
// VM intruction. This ensures there are no remaining "uses" within
// these hidden instructions, before the values of a method are freed.
//
void dropAllReferences();
const std::vector<Value*> &getTempValues() const { return tempVec; }
std::vector<Value*> &getTempValues() { return tempVec; }
inline MachineCodeForInstruction &addTemp(Value *tmp) {
tempVec.push_back(tmp);
return *this;
}
};
#endif
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