forked from OSchip/llvm-project
98 lines
3.7 KiB
C++
98 lines
3.7 KiB
C++
//===-- MachineCodeForInstruction.h -----------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// FIXME: This file is SparcV9 specific. Do not rely on this class for new
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// targets, it will go away in the future.
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//
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// Representation of the sequence of machine instructions created for a single
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// VM instruction. Additionally records information about hidden and implicit
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// values used by the machine instructions: about hidden values used by the
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// machine instructions:
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//
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// "Temporary values" are intermediate values used in the machine instruction
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// sequence, but not in the VM instruction Note that such values should be
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// treated as pure SSA values with no interpretation of their operands (i.e., as
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// a TmpInstruction 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 MACHINECODE_FOR_INSTRUCTION_H
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#define MACHINECODE_FOR_INSTRUCTION_H
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#include <vector>
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namespace llvm {
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class MachineInstr;
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class Instruction;
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class Value;
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class CallArgsDescriptor;
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class MachineCodeForInstruction {
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std::vector<Value*> tempVec; // used by m/c instr but not VM instr
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std::vector<MachineInstr*> Contents; // the machine instr for this VM instr
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CallArgsDescriptor* callArgsDesc; // only used for CALL instructions
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public:
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MachineCodeForInstruction() : callArgsDesc(NULL) {}
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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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// Access to underlying machine instructions...
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typedef std::vector<MachineInstr*>::iterator iterator;
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typedef std::vector<MachineInstr*>::const_iterator const_iterator;
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unsigned size() const { return Contents.size(); }
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bool empty() const { return Contents.empty(); }
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MachineInstr *front() const { return Contents.front(); }
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MachineInstr *back() const { return Contents.back(); }
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MachineInstr *&operator[](unsigned i) { return Contents[i]; }
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MachineInstr *operator[](unsigned i) const { return Contents[i]; }
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void pop_back() { Contents.pop_back(); }
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iterator begin() { return Contents.begin(); }
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iterator end() { return Contents.end(); }
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const_iterator begin() const { return Contents.begin(); }
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const_iterator end() const { return Contents.end(); }
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template<class InIt>
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void insert(iterator where, InIt first, InIt last) {
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Contents.insert(where, first, last);
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}
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iterator erase(iterator where) { return Contents.erase(where); }
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iterator erase(iterator s, iterator e) { return Contents.erase(s, e); }
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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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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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void setCallArgsDescriptor(CallArgsDescriptor* desc) { callArgsDesc = desc; }
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CallArgsDescriptor* getCallArgsDescriptor() const { return callArgsDesc; }
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};
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} // End llvm namespace
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#endif
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