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dfe412dc8b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1980 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
//===-- llvm/CodeGen/MachineCodeForInstruction.h -----------------*- C++ -*--=//
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//
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// Representation of the sequence of machine instructions created
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// for a single VM instruction. Additionally records information
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// about hidden and implicit values used by the machine instructions:
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// about hidden values used by the machine instructions:
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//
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// "Temporary values" are intermediate values used in the machine
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// instruction sequence, but not in the VM instruction
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// Note that such values should be treated as pure SSA values with
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// no interpretation of their operands (i.e., as a TmpInstruction
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// object which actually represents such a value).
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//
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// (2) "Implicit uses" are values used in the VM instruction but not in
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// the machine instruction sequence
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINECODE_FOR_INSTRUCTION_H
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#define LLVM_CODEGEN_MACHINECODE_FOR_INSTRUCTION_H
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#include "llvm/Annotation.h"
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#include <vector>
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class MachineInstr;
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class Instruction;
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class Value;
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class MachineCodeForInstruction
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: public Annotation, public std::vector<MachineInstr*> {
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std::vector<Value*> tempVec; // used by m/c instr but not VM instr
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public:
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MachineCodeForInstruction();
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~MachineCodeForInstruction();
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static MachineCodeForInstruction &get(const Instruction *I);
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static void destroy(const Instruction *I);
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// dropAllReferences() - This function drops all references within
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// temporary (hidden) instructions created in implementing the original
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// VM intruction. This ensures there are no remaining "uses" within
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// these hidden instructions, before the values of a method are freed.
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//
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void dropAllReferences();
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const std::vector<Value*> &getTempValues() const { return tempVec; }
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std::vector<Value*> &getTempValues() { return tempVec; }
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inline MachineCodeForInstruction &addTemp(Value *tmp) {
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tempVec.push_back(tmp);
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return *this;
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}
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};
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#endif
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