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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/Instruction.h"
static 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 Initializer {
Initializer() {
AnnotationManager::registerAnnotationFactory(MCFI_AID, &CreateMCFI);
}
} RegisterAID;
MachineCodeForInstruction &MachineCodeForInstruction::get(const Instruction *I){
return *(MachineCodeForInstruction*)I->getOrCreateAnnotation(MCFI_AID);
}
void MachineCodeForInstruction::destroy(const Instruction *I) {
I->deleteAnnotation(MCFI_AID);
}
MachineCodeForInstruction::MachineCodeForInstruction() : Annotation(MCFI_AID) {}
MachineCodeForInstruction::~MachineCodeForInstruction() {
// 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];
}
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