1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
//===-- LlvmState.cpp -------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "LlvmState.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
namespace exegesis {
LLVMState::LLVMState()
: TheTriple(llvm::sys::getProcessTriple()),
CpuName(llvm::sys::getHostCPUName().str()) {
std::string Error;
TheTarget = llvm::TargetRegistry::lookupTarget(TheTriple, Error);
assert(TheTarget && "unknown target for host");
SubtargetInfo.reset(
TheTarget->createMCSubtargetInfo(TheTriple, CpuName, Features));
InstrInfo.reset(TheTarget->createMCInstrInfo());
RegInfo.reset(TheTarget->createMCRegInfo(TheTriple));
AsmInfo.reset(TheTarget->createMCAsmInfo(*RegInfo, TheTriple));
}
std::unique_ptr<llvm::LLVMTargetMachine>
LLVMState::createTargetMachine() const {
const llvm::TargetOptions Options;
return std::unique_ptr<llvm::LLVMTargetMachine>(
static_cast<llvm::LLVMTargetMachine *>(TheTarget->createTargetMachine(
TheTriple, CpuName, Features, Options, llvm::Reloc::Model::Static)));
}
bool LLVMState::canAssemble(const llvm::MCInst &Inst) const {
llvm::MCObjectFileInfo ObjectFileInfo;
llvm::MCContext Context(AsmInfo.get(), RegInfo.get(), &ObjectFileInfo);
std::unique_ptr<const llvm::MCCodeEmitter> CodeEmitter(
TheTarget->createMCCodeEmitter(*InstrInfo, *RegInfo, Context));
llvm::SmallVector<char, 16> Tmp;
llvm::raw_svector_ostream OS(Tmp);
llvm::SmallVector<llvm::MCFixup, 4> Fixups;
CodeEmitter->encodeInstruction(Inst, OS, Fixups, *SubtargetInfo);
return Tmp.size() > 0;
}
} // namespace exegesis
|
