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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
//===-- 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 "Target.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(const std::string &Triple, const std::string &CpuName) {
std::string Error;
const llvm::Target *const TheTarget =
llvm::TargetRegistry::lookupTarget(Triple, Error);
assert(TheTarget && "unknown target for host");
const llvm::TargetOptions Options;
TargetMachine.reset(static_cast<llvm::LLVMTargetMachine *>(
TheTarget->createTargetMachine(Triple, CpuName, /*Features*/ "", Options,
llvm::Reloc::Model::Static)));
TheExegesisTarget = ExegesisTarget::lookup(TargetMachine->getTargetTriple());
if (!TheExegesisTarget) {
llvm::errs() << "no exegesis target for " << Triple << ", using default\n";
TheExegesisTarget = &ExegesisTarget::getDefault();
}
}
LLVMState::LLVMState()
: LLVMState(llvm::sys::getProcessTriple(),
llvm::sys::getHostCPUName().str()) {}
std::unique_ptr<llvm::LLVMTargetMachine>
LLVMState::createTargetMachine() const {
return std::unique_ptr<llvm::LLVMTargetMachine>(
static_cast<llvm::LLVMTargetMachine *>(
TargetMachine->getTarget().createTargetMachine(
TargetMachine->getTargetTriple().normalize(),
TargetMachine->getTargetCPU(),
TargetMachine->getTargetFeatureString(), TargetMachine->Options,
llvm::Reloc::Model::Static)));
}
bool LLVMState::canAssemble(const llvm::MCInst &Inst) const {
llvm::MCObjectFileInfo ObjectFileInfo;
llvm::MCContext Context(TargetMachine->getMCAsmInfo(),
TargetMachine->getMCRegisterInfo(), &ObjectFileInfo);
std::unique_ptr<const llvm::MCCodeEmitter> CodeEmitter(
TargetMachine->getTarget().createMCCodeEmitter(
*TargetMachine->getMCInstrInfo(), *TargetMachine->getMCRegisterInfo(),
Context));
llvm::SmallVector<char, 16> Tmp;
llvm::raw_svector_ostream OS(Tmp);
llvm::SmallVector<llvm::MCFixup, 4> Fixups;
CodeEmitter->encodeInstruction(Inst, OS, Fixups,
*TargetMachine->getMCSubtargetInfo());
return Tmp.size() > 0;
}
} // namespace exegesis
|
