| //===-- 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" |
| |
| namespace llvm { |
| |
| 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; |
| } |
| |
| } // End llvm namespace |