llvm.org GIT mirror llvm / release_1 lib / CodeGen / MachineCodeForInstruction.cpp

Tree @release_1 (Download .tar.gz)

MachineCodeForInstruction.cpp @release_1raw · history · blame

//===-- MachineCodeForInstruction.cpp -------------------------------------===//
//                     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.
// 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

#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrAnnot.h"
#include "llvm/CodeGen/InstrSelection.h"

AnnotationID MCFI_AID(

static Annotation *CreateMCFI(AnnotationID AID, const Annotable *, void *) {
  assert(AID == MCFI_AID);
  return new MachineCodeForInstruction();  // Invoke constructor!

// Register the annotation with the annotation factory
static struct MCFIInitializer {
  MCFIInitializer() {
    AnnotationManager::registerAnnotationFactory(MCFI_AID, &CreateMCFI);
} RegisterCreateMCFI;

  for (unsigned i=0, N=tempVec.size(); i < N; i++)

  // Let go of all uses in temp. instructions
  // Free the Value objects created to hold intermediate values
  for (unsigned i=0, N=tempVec.size(); i < N; i++)
    delete tempVec[i];
  // Free the MachineInstr objects allocated, if any.
  for (unsigned i=0, N = size(); i < N; i++)
    delete (*this)[i];

  // Free the CallArgsDescriptor if it exists.
  if (callArgsDesc)
    delete callArgsDesc;