1 //===-- MachineCodeForInstruction.cpp -------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Representation of the sequence of machine instructions created for a single
11 // VM instruction. Additionally records information about hidden and implicit
12 // values used by the machine instructions: about hidden values used by the
13 // machine instructions:
15 // "Temporary values" are intermediate values used in the machine instruction
16 // sequence, but not in the VM instruction Note that such values should be
17 // treated as pure SSA values with no interpretation of their operands (i.e., as
18 // a TmpInstruction object which actually represents such a value).
20 // (2) "Implicit uses" are values used in the VM instruction but not in the
21 // machine instruction sequence
23 //===----------------------------------------------------------------------===//
25 #include "llvm/CodeGen/MachineCodeForInstruction.h"
26 #include "llvm/CodeGen/MachineInstr.h"
27 #include "llvm/CodeGen/MachineInstrAnnot.h"
28 #include "llvm/CodeGen/InstrSelection.h"
32 AnnotationID MCFI_AID(
33 AnnotationManager::getID("CodeGen::MachineCodeForInstruction"));
35 static Annotation *CreateMCFI(AnnotationID AID, const Annotable *, void *) {
36 assert(AID == MCFI_AID);
37 return new MachineCodeForInstruction(); // Invoke constructor!
40 // Register the annotation with the annotation factory
41 static struct MCFIInitializer {
43 AnnotationManager::registerAnnotationFactory(MCFI_AID, &CreateMCFI);
49 MachineCodeForInstruction::dropAllReferences()
51 for (unsigned i=0, N=tempVec.size(); i < N; i++)
52 cast<TmpInstruction>(tempVec[i])->dropAllReferences();
56 MachineCodeForInstruction::~MachineCodeForInstruction()
58 // Let go of all uses in temp. instructions
61 // Free the Value objects created to hold intermediate values
62 for (unsigned i=0, N=tempVec.size(); i < N; i++)
65 // Free the MachineInstr objects allocated, if any.
66 for (unsigned i=0, N = size(); i < N; i++)
69 // Free the CallArgsDescriptor if it exists.
74 } // End llvm namespace