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462 lines
15 KiB
C++
462 lines
15 KiB
C++
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//===- MCModuleYAML.cpp - MCModule YAMLIO implementation ------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines classes for handling the YAML representation of MCModule.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCModuleYAML.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/MC/MCAtom.h"
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#include "llvm/MC/MCFunction.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/Object/YAML.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/YAMLTraits.h"
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#include <vector>
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namespace llvm {
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namespace {
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// This class is used to map opcode and register names to enum values.
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//
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// There are at least 3 obvious ways to do this:
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// 1- Generate an MII/MRI method using a tablegen StringMatcher
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// 2- Write an MII/MRI method using std::lower_bound and the assumption that
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// the enums are sorted (starting at a fixed value).
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// 3- Do the matching manually as is done here.
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//
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// Why 3?
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// 1- A StringMatcher function for thousands of entries would incur
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// a non-negligible binary size overhead.
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// 2- The lower_bound comparators would be somewhat involved and aren't
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// obviously reusable (see LessRecordRegister in llvm/TableGen/Record.h)
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// 3- This isn't actually something useful outside tests (but the same argument
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// can be made against having {MII,MRI}::getName).
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//
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// If this becomes useful outside this specific situation, feel free to do
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// the Right Thing (tm) and move the functionality to MII/MRI.
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//
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class InstrRegInfoHolder {
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typedef StringMap<unsigned, BumpPtrAllocator> EnumValByNameTy;
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EnumValByNameTy InstEnumValueByName;
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EnumValByNameTy RegEnumValueByName;
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public:
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const MCInstrInfo &MII;
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const MCRegisterInfo &MRI;
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InstrRegInfoHolder(const MCInstrInfo &MII, const MCRegisterInfo &MRI)
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: InstEnumValueByName(NextPowerOf2(MII.getNumOpcodes())),
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RegEnumValueByName(NextPowerOf2(MRI.getNumRegs())), MII(MII), MRI(MRI) {
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for (int i = 0, e = MII.getNumOpcodes(); i != e; ++i)
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InstEnumValueByName[MII.getName(i)] = i;
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for (int i = 0, e = MRI.getNumRegs(); i != e; ++i)
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RegEnumValueByName[MRI.getName(i)] = i;
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}
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bool matchRegister(StringRef Name, unsigned &Reg) {
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EnumValByNameTy::const_iterator It = RegEnumValueByName.find(Name);
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if (It == RegEnumValueByName.end())
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return false;
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Reg = It->getValue();
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return true;
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}
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bool matchOpcode(StringRef Name, unsigned &Opc) {
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EnumValByNameTy::const_iterator It = InstEnumValueByName.find(Name);
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if (It == InstEnumValueByName.end())
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return false;
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Opc = It->getValue();
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return true;
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}
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};
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} // end unnamed namespace
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namespace MCModuleYAML {
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LLVM_YAML_STRONG_TYPEDEF(unsigned, OpcodeEnum)
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struct Operand {
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MCOperand MCOp;
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};
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struct Inst {
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OpcodeEnum Opcode;
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std::vector<Operand> Operands;
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uint64_t Size;
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};
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struct Atom {
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MCAtom::AtomKind Type;
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yaml::Hex64 StartAddress;
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uint64_t Size;
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std::vector<Inst> Insts;
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object::yaml::BinaryRef Data;
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};
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struct BasicBlock {
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yaml::Hex64 Address;
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std::vector<yaml::Hex64> Preds;
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std::vector<yaml::Hex64> Succs;
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};
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struct Function {
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StringRef Name;
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std::vector<BasicBlock> BasicBlocks;
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};
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struct Module {
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std::vector<Atom> Atoms;
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std::vector<Function> Functions;
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};
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} // end namespace MCModuleYAML
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} // end namespace llvm
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LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(llvm::yaml::Hex64)
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LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(llvm::MCModuleYAML::Operand)
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MCModuleYAML::Inst)
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MCModuleYAML::Atom)
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MCModuleYAML::BasicBlock)
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LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::MCModuleYAML::Function)
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namespace llvm {
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namespace yaml {
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template <> struct ScalarEnumerationTraits<MCAtom::AtomKind> {
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static void enumeration(IO &IO, MCAtom::AtomKind &Kind);
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};
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template <> struct MappingTraits<MCModuleYAML::Atom> {
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static void mapping(IO &IO, MCModuleYAML::Atom &A);
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};
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template <> struct MappingTraits<MCModuleYAML::Inst> {
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static void mapping(IO &IO, MCModuleYAML::Inst &I);
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};
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template <> struct MappingTraits<MCModuleYAML::BasicBlock> {
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static void mapping(IO &IO, MCModuleYAML::BasicBlock &BB);
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};
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template <> struct MappingTraits<MCModuleYAML::Function> {
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static void mapping(IO &IO, MCModuleYAML::Function &Fn);
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};
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template <> struct MappingTraits<MCModuleYAML::Module> {
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static void mapping(IO &IO, MCModuleYAML::Module &M);
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};
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template <> struct ScalarTraits<MCModuleYAML::Operand> {
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static void output(const MCModuleYAML::Operand &, void *,
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llvm::raw_ostream &);
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static StringRef input(StringRef, void *, MCModuleYAML::Operand &);
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};
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template <> struct ScalarTraits<MCModuleYAML::OpcodeEnum> {
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static void output(const MCModuleYAML::OpcodeEnum &, void *,
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llvm::raw_ostream &);
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static StringRef input(StringRef, void *, MCModuleYAML::OpcodeEnum &);
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};
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void ScalarEnumerationTraits<MCAtom::AtomKind>::enumeration(
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IO &IO, MCAtom::AtomKind &Value) {
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IO.enumCase(Value, "Text", MCAtom::TextAtom);
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IO.enumCase(Value, "Data", MCAtom::DataAtom);
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}
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void MappingTraits<MCModuleYAML::Atom>::mapping(IO &IO, MCModuleYAML::Atom &A) {
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IO.mapRequired("StartAddress", A.StartAddress);
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IO.mapRequired("Size", A.Size);
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IO.mapRequired("Type", A.Type);
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if (A.Type == MCAtom::TextAtom)
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IO.mapRequired("Content", A.Insts);
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else if (A.Type == MCAtom::DataAtom)
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IO.mapRequired("Content", A.Data);
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}
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void MappingTraits<MCModuleYAML::Inst>::mapping(IO &IO, MCModuleYAML::Inst &I) {
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IO.mapRequired("Inst", I.Opcode);
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IO.mapRequired("Size", I.Size);
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IO.mapRequired("Ops", I.Operands);
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}
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void
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MappingTraits<MCModuleYAML::BasicBlock>::mapping(IO &IO,
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MCModuleYAML::BasicBlock &BB) {
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IO.mapRequired("Address", BB.Address);
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IO.mapRequired("Preds", BB.Preds);
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IO.mapRequired("Succs", BB.Succs);
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}
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void MappingTraits<MCModuleYAML::Function>::mapping(IO &IO,
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MCModuleYAML::Function &F) {
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IO.mapRequired("Name", F.Name);
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IO.mapRequired("BasicBlocks", F.BasicBlocks);
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}
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void MappingTraits<MCModuleYAML::Module>::mapping(IO &IO,
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MCModuleYAML::Module &M) {
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IO.mapRequired("Atoms", M.Atoms);
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IO.mapOptional("Functions", M.Functions);
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}
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void
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ScalarTraits<MCModuleYAML::Operand>::output(const MCModuleYAML::Operand &Val,
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void *Ctx, raw_ostream &Out) {
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InstrRegInfoHolder *IRI = (InstrRegInfoHolder *)Ctx;
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// FIXME: Doesn't support FPImm and expr/inst, but do these make sense?
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if (Val.MCOp.isImm())
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Out << "I" << Val.MCOp.getImm();
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else if (Val.MCOp.isReg())
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Out << "R" << IRI->MRI.getName(Val.MCOp.getReg());
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else
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llvm_unreachable("Trying to output invalid MCOperand!");
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}
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StringRef
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ScalarTraits<MCModuleYAML::Operand>::input(StringRef Scalar, void *Ctx,
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MCModuleYAML::Operand &Val) {
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InstrRegInfoHolder *IRI = (InstrRegInfoHolder *)Ctx;
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char Type = 0;
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if (Scalar.size() >= 1)
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Type = Scalar.front();
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if (Type != 'R' && Type != 'I')
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return "Operand must start with 'R' (register) or 'I' (immediate).";
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if (Type == 'R') {
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unsigned Reg;
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if (!IRI->matchRegister(Scalar.substr(1), Reg))
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return "Invalid register name.";
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Val.MCOp = MCOperand::CreateReg(Reg);
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} else if (Type == 'I') {
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int64_t RIVal;
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if (Scalar.substr(1).getAsInteger(10, RIVal))
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return "Invalid immediate value.";
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Val.MCOp = MCOperand::CreateImm(RIVal);
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} else {
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Val.MCOp = MCOperand();
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}
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return StringRef();
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}
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void ScalarTraits<MCModuleYAML::OpcodeEnum>::output(
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const MCModuleYAML::OpcodeEnum &Val, void *Ctx, raw_ostream &Out) {
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InstrRegInfoHolder *IRI = (InstrRegInfoHolder *)Ctx;
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Out << IRI->MII.getName(Val);
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}
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StringRef
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ScalarTraits<MCModuleYAML::OpcodeEnum>::input(StringRef Scalar, void *Ctx,
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MCModuleYAML::OpcodeEnum &Val) {
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InstrRegInfoHolder *IRI = (InstrRegInfoHolder *)Ctx;
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unsigned Opc;
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if (!IRI->matchOpcode(Scalar, Opc))
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return "Invalid instruction opcode.";
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Val = Opc;
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return "";
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}
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} // end namespace yaml
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namespace {
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class MCModule2YAML {
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const MCModule &MCM;
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MCModuleYAML::Module YAMLModule;
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void dumpAtom(const MCAtom *MCA);
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void dumpFunction(const MCFunction *MCF);
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void dumpBasicBlock(const MCBasicBlock *MCBB);
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public:
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MCModule2YAML(const MCModule &MCM);
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MCModuleYAML::Module &getYAMLModule();
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};
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class YAML2MCModule {
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MCModule &MCM;
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public:
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YAML2MCModule(MCModule &MCM);
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StringRef parse(const MCModuleYAML::Module &YAMLModule);
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};
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} // end unnamed namespace
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MCModule2YAML::MCModule2YAML(const MCModule &MCM) : MCM(MCM), YAMLModule() {
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for (MCModule::const_atom_iterator AI = MCM.atom_begin(), AE = MCM.atom_end();
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AI != AE; ++AI)
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dumpAtom(*AI);
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for (MCModule::const_func_iterator FI = MCM.func_begin(), FE = MCM.func_end();
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FI != FE; ++FI)
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dumpFunction(*FI);
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}
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void MCModule2YAML::dumpAtom(const MCAtom *MCA) {
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YAMLModule.Atoms.resize(YAMLModule.Atoms.size() + 1);
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MCModuleYAML::Atom &A = YAMLModule.Atoms.back();
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A.Type = MCA->getKind();
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A.StartAddress = MCA->getBeginAddr();
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A.Size = MCA->getEndAddr() - MCA->getBeginAddr() + 1;
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if (const MCTextAtom *TA = dyn_cast<MCTextAtom>(MCA)) {
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const size_t InstCount = TA->size();
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A.Insts.resize(InstCount);
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for (size_t i = 0; i != InstCount; ++i) {
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const MCDecodedInst &MCDI = TA->at(i);
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A.Insts[i].Opcode = MCDI.Inst.getOpcode();
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A.Insts[i].Size = MCDI.Size;
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const unsigned OpCount = MCDI.Inst.getNumOperands();
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A.Insts[i].Operands.resize(OpCount);
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for (unsigned oi = 0; oi != OpCount; ++oi)
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A.Insts[i].Operands[oi].MCOp = MCDI.Inst.getOperand(oi);
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}
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} else if (const MCDataAtom *DA = dyn_cast<MCDataAtom>(MCA)) {
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A.Data = DA->getData();
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} else {
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llvm_unreachable("Unknown atom type.");
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}
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}
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void MCModule2YAML::dumpFunction(const MCFunction *MCF) {
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YAMLModule.Functions.resize(YAMLModule.Functions.size() + 1);
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MCModuleYAML::Function &F = YAMLModule.Functions.back();
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F.Name = MCF->getName();
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for (MCFunction::const_iterator BBI = MCF->begin(), BBE = MCF->end();
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BBI != BBE; ++BBI) {
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const MCBasicBlock *MCBB = *BBI;
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F.BasicBlocks.resize(F.BasicBlocks.size() + 1);
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MCModuleYAML::BasicBlock &BB = F.BasicBlocks.back();
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BB.Address = MCBB->getInsts()->getBeginAddr();
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for (MCBasicBlock::pred_const_iterator PI = MCBB->pred_begin(),
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PE = MCBB->pred_end();
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PI != PE; ++PI)
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BB.Preds.push_back((*PI)->getInsts()->getBeginAddr());
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for (MCBasicBlock::succ_const_iterator SI = MCBB->succ_begin(),
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SE = MCBB->succ_end();
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SI != SE; ++SI)
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BB.Succs.push_back((*SI)->getInsts()->getBeginAddr());
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}
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}
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MCModuleYAML::Module &MCModule2YAML::getYAMLModule() { return YAMLModule; }
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YAML2MCModule::YAML2MCModule(MCModule &MCM) : MCM(MCM) {}
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StringRef YAML2MCModule::parse(const MCModuleYAML::Module &YAMLModule) {
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typedef std::vector<MCModuleYAML::Atom>::const_iterator AtomIt;
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typedef std::vector<MCModuleYAML::Inst>::const_iterator InstIt;
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typedef std::vector<MCModuleYAML::Operand>::const_iterator OpIt;
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typedef DenseMap<uint64_t, MCTextAtom *> AddrToTextAtomTy;
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AddrToTextAtomTy TAByAddr;
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for (AtomIt AI = YAMLModule.Atoms.begin(), AE = YAMLModule.Atoms.end();
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AI != AE; ++AI) {
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uint64_t StartAddress = AI->StartAddress;
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if (AI->Size == 0)
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return "Atoms can't be empty!";
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uint64_t EndAddress = StartAddress + AI->Size - 1;
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switch (AI->Type) {
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case MCAtom::TextAtom: {
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MCTextAtom *TA = MCM.createTextAtom(StartAddress, EndAddress);
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TAByAddr[StartAddress] = TA;
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for (InstIt II = AI->Insts.begin(), IE = AI->Insts.end(); II != IE;
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++II) {
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MCInst MI;
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MI.setOpcode(II->Opcode);
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for (OpIt OI = II->Operands.begin(), OE = II->Operands.end(); OI != OE;
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++OI)
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MI.addOperand(OI->MCOp);
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TA->addInst(MI, II->Size);
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}
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break;
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}
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case MCAtom::DataAtom: {
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MCDataAtom *DA = MCM.createDataAtom(StartAddress, EndAddress);
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SmallVector<char, 64> Data;
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raw_svector_ostream OS(Data);
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AI->Data.writeAsBinary(OS);
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OS.flush();
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for (size_t i = 0, e = Data.size(); i != e; ++i)
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DA->addData((uint8_t)Data[i]);
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break;
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}
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}
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}
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typedef std::vector<MCModuleYAML::Function>::const_iterator FuncIt;
|
||
|
typedef std::vector<MCModuleYAML::BasicBlock>::const_iterator BBIt;
|
||
|
typedef std::vector<yaml::Hex64>::const_iterator AddrIt;
|
||
|
for (FuncIt FI = YAMLModule.Functions.begin(),
|
||
|
FE = YAMLModule.Functions.end();
|
||
|
FI != FE; ++FI) {
|
||
|
MCFunction *MCFN = MCM.createFunction(FI->Name);
|
||
|
for (BBIt BBI = FI->BasicBlocks.begin(), BBE = FI->BasicBlocks.end();
|
||
|
BBI != BBE; ++BBI) {
|
||
|
AddrToTextAtomTy::const_iterator It = TAByAddr.find(BBI->Address);
|
||
|
if (It == TAByAddr.end())
|
||
|
return "Basic block start address doesn't match any text atom!";
|
||
|
MCFN->createBlock(*It->second);
|
||
|
}
|
||
|
for (BBIt BBI = FI->BasicBlocks.begin(), BBE = FI->BasicBlocks.end();
|
||
|
BBI != BBE; ++BBI) {
|
||
|
MCBasicBlock *MCBB = MCFN->find(BBI->Address);
|
||
|
if (!MCBB)
|
||
|
return "Couldn't find matching basic block in function.";
|
||
|
for (AddrIt PI = BBI->Preds.begin(), PE = BBI->Preds.end(); PI != PE;
|
||
|
++PI) {
|
||
|
MCBasicBlock *Pred = MCFN->find(*PI);
|
||
|
if (!Pred)
|
||
|
return "Couldn't find predecessor basic block.";
|
||
|
MCBB->addPredecessor(Pred);
|
||
|
}
|
||
|
for (AddrIt SI = BBI->Succs.begin(), SE = BBI->Succs.end(); SI != SE;
|
||
|
++SI) {
|
||
|
MCBasicBlock *Succ = MCFN->find(*SI);
|
||
|
if (!Succ)
|
||
|
return "Couldn't find predecessor basic block.";
|
||
|
MCBB->addSuccessor(Succ);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return "";
|
||
|
}
|
||
|
|
||
|
StringRef mcmodule2yaml(raw_ostream &OS, const MCModule &MCM,
|
||
|
const MCInstrInfo &MII, const MCRegisterInfo &MRI) {
|
||
|
MCModule2YAML Dumper(MCM);
|
||
|
InstrRegInfoHolder IRI(MII, MRI);
|
||
|
yaml::Output YOut(OS, (void *)&IRI);
|
||
|
YOut << Dumper.getYAMLModule();
|
||
|
return "";
|
||
|
}
|
||
|
|
||
|
StringRef yaml2mcmodule(OwningPtr<MCModule> &MCM, StringRef YamlContent,
|
||
|
const MCInstrInfo &MII, const MCRegisterInfo &MRI) {
|
||
|
MCM.reset(new MCModule);
|
||
|
YAML2MCModule Parser(*MCM);
|
||
|
MCModuleYAML::Module YAMLModule;
|
||
|
InstrRegInfoHolder IRI(MII, MRI);
|
||
|
yaml::Input YIn(YamlContent, (void *)&IRI);
|
||
|
YIn >> YAMLModule;
|
||
|
if (error_code ec = YIn.error())
|
||
|
return ec.message();
|
||
|
StringRef err = Parser.parse(YAMLModule);
|
||
|
if (!err.empty())
|
||
|
return err;
|
||
|
return "";
|
||
|
}
|
||
|
|
||
|
} // end namespace llvm
|