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//===-- MachineCodeForInstruction.cpp -------------------------------------===//
//
// 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(
AnnotationManager::getID("CodeGen::MachineCodeForInstruction"));
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;
void
MachineCodeForInstruction::dropAllReferences()
{
for (unsigned i=0, N=tempVec.size(); i < N; i++)
cast<TmpInstruction>(tempVec[i])->dropAllReferences();
}
MachineCodeForInstruction::~MachineCodeForInstruction()
{
// Let go of all uses in temp. instructions
dropAllReferences();
// 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;
}
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