forked from OSchip/llvm-project
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
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//===-- LlvmState.cpp -------------------------------------------*- C++ -*-===//
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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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#include "LlvmState.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetOptions.h"
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namespace exegesis {
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LLVMState::LLVMState()
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: TheTriple(llvm::sys::getProcessTriple()),
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CpuName(llvm::sys::getHostCPUName().str()) {
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std::string Error;
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TheTarget = llvm::TargetRegistry::lookupTarget(TheTriple, Error);
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assert(TheTarget && "unknown target for host");
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SubtargetInfo.reset(
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TheTarget->createMCSubtargetInfo(TheTriple, CpuName, Features));
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InstrInfo.reset(TheTarget->createMCInstrInfo());
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RegInfo.reset(TheTarget->createMCRegInfo(TheTriple));
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AsmInfo.reset(TheTarget->createMCAsmInfo(*RegInfo, TheTriple));
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}
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std::unique_ptr<llvm::LLVMTargetMachine>
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LLVMState::createTargetMachine() const {
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const llvm::TargetOptions Options;
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return std::unique_ptr<llvm::LLVMTargetMachine>(
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static_cast<llvm::LLVMTargetMachine *>(TheTarget->createTargetMachine(
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TheTriple, CpuName, Features, Options, llvm::Reloc::Model::Static)));
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}
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bool LLVMState::canAssemble(const llvm::MCInst &Inst) const {
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llvm::MCObjectFileInfo ObjectFileInfo;
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llvm::MCContext Context(AsmInfo.get(), RegInfo.get(), &ObjectFileInfo);
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std::unique_ptr<const llvm::MCCodeEmitter> CodeEmitter(
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TheTarget->createMCCodeEmitter(*InstrInfo, *RegInfo, Context));
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llvm::SmallVector<char, 16> Tmp;
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llvm::raw_svector_ostream OS(Tmp);
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llvm::SmallVector<llvm::MCFixup, 4> Fixups;
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CodeEmitter->encodeInstruction(Inst, OS, Fixups, *SubtargetInfo);
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return Tmp.size() > 0;
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}
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} // namespace exegesis
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