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75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
//===-- MachineCodeForInstruction.cpp -------------------------------------===//
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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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// 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 the
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// machine instruction sequence
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineCodeForInstruction.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineInstrAnnot.h"
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#include "llvm/CodeGen/InstrSelection.h"
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namespace llvm {
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AnnotationID MCFI_AID(
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AnnotationManager::getID("CodeGen::MachineCodeForInstruction"));
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static Annotation *CreateMCFI(AnnotationID AID, const Annotable *, void *) {
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assert(AID == MCFI_AID);
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return new MachineCodeForInstruction(); // Invoke constructor!
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}
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// Register the annotation with the annotation factory
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static struct MCFIInitializer {
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MCFIInitializer() {
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AnnotationManager::registerAnnotationFactory(MCFI_AID, &CreateMCFI);
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}
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} RegisterCreateMCFI;
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void
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MachineCodeForInstruction::dropAllReferences()
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{
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for (unsigned i=0, N=tempVec.size(); i < N; i++)
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cast<TmpInstruction>(tempVec[i])->dropAllReferences();
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}
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MachineCodeForInstruction::~MachineCodeForInstruction()
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{
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// Let go of all uses in temp. instructions
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dropAllReferences();
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// Free the Value objects created to hold intermediate values
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for (unsigned i=0, N=tempVec.size(); i < N; i++)
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delete tempVec[i];
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// Free the MachineInstr objects allocated, if any.
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for (unsigned i=0, N = size(); i < N; i++)
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delete (*this)[i];
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// Free the CallArgsDescriptor if it exists.
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if (callArgsDesc)
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delete callArgsDesc;
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}
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} // End llvm namespace
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