X86TargetMachine.cpp [plain text]
#include "X86MCAsmInfo.h"
#include "X86TargetMachine.h"
#include "X86.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
using namespace llvm;
static const MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
Triple TheTriple(TT);
switch (TheTriple.getOS()) {
case Triple::Darwin:
return new X86MCAsmInfoDarwin(TheTriple);
case Triple::MinGW32:
case Triple::MinGW64:
case Triple::Cygwin:
case Triple::Win32:
return new X86MCAsmInfoCOFF(TheTriple);
default:
return new X86ELFMCAsmInfo(TheTriple);
}
}
extern "C" void LLVMInitializeX86Target() {
RegisterTargetMachine<X86_32TargetMachine> X(TheX86_32Target);
RegisterTargetMachine<X86_64TargetMachine> Y(TheX86_64Target);
RegisterAsmInfoFn A(TheX86_32Target, createMCAsmInfo);
RegisterAsmInfoFn B(TheX86_64Target, createMCAsmInfo);
TargetRegistry::RegisterCodeEmitter(TheX86_32Target,
createX86_32MCCodeEmitter);
TargetRegistry::RegisterCodeEmitter(TheX86_64Target,
createX86_64MCCodeEmitter);
TargetRegistry::RegisterAsmBackend(TheX86_32Target,
createX86_32AsmBackend);
TargetRegistry::RegisterAsmBackend(TheX86_64Target,
createX86_64AsmBackend);
}
X86_32TargetMachine::X86_32TargetMachine(const Target &T, const std::string &TT,
const std::string &FS)
: X86TargetMachine(T, TT, FS, false) {
}
X86_64TargetMachine::X86_64TargetMachine(const Target &T, const std::string &TT,
const std::string &FS)
: X86TargetMachine(T, TT, FS, true) {
}
X86TargetMachine::X86TargetMachine(const Target &T, const std::string &TT,
const std::string &FS, bool is64Bit)
: LLVMTargetMachine(T, TT),
Subtarget(TT, FS, is64Bit),
DataLayout(Subtarget.getDataLayout()),
FrameInfo(TargetFrameInfo::StackGrowsDown,
Subtarget.getStackAlignment(),
(Subtarget.isTargetWin64() ? -40 :
(Subtarget.is64Bit() ? -8 : -4))),
InstrInfo(*this), JITInfo(*this), TLInfo(*this), ELFWriterInfo(*this) {
DefRelocModel = getRelocationModel();
if (getRelocationModel() == Reloc::Default) {
if (!Subtarget.isTargetDarwin())
setRelocationModel(Reloc::Static);
else if (Subtarget.is64Bit())
setRelocationModel(Reloc::PIC_);
else
setRelocationModel(Reloc::DynamicNoPIC);
}
assert(getRelocationModel() != Reloc::Default &&
"Relocation mode not picked");
if (getRelocationModel() == Reloc::DynamicNoPIC) {
if (is64Bit)
setRelocationModel(Reloc::PIC_);
else if (!Subtarget.isTargetDarwin())
setRelocationModel(Reloc::Static);
}
if (getRelocationModel() == Reloc::Static &&
Subtarget.isTargetDarwin() &&
is64Bit)
setRelocationModel(Reloc::PIC_);
if (getRelocationModel() == Reloc::Static) {
Subtarget.setPICStyle(PICStyles::None);
} else if (Subtarget.isTargetCygMing()) {
Subtarget.setPICStyle(PICStyles::None);
} else if (Subtarget.isTargetDarwin()) {
if (Subtarget.is64Bit())
Subtarget.setPICStyle(PICStyles::RIPRel);
else if (getRelocationModel() == Reloc::PIC_)
Subtarget.setPICStyle(PICStyles::StubPIC);
else {
assert(getRelocationModel() == Reloc::DynamicNoPIC);
Subtarget.setPICStyle(PICStyles::StubDynamicNoPIC);
}
} else if (Subtarget.isTargetELF()) {
if (Subtarget.is64Bit())
Subtarget.setPICStyle(PICStyles::RIPRel);
else
Subtarget.setPICStyle(PICStyles::GOT);
}
if (Subtarget.getPICStyle() == PICStyles::None)
setRelocationModel(Reloc::Static);
}
bool X86TargetMachine::addInstSelector(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
PM.add(createX86ISelDag(*this, OptLevel));
PM.add(createX87FPRegKillInserterPass());
return false;
}
bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
return false; }
bool X86TargetMachine::addPostRegAlloc(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
PM.add(createX86FloatingPointStackifierPass());
return true; }
bool X86TargetMachine::addPreEmitPass(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
if (OptLevel != CodeGenOpt::None && Subtarget.hasSSE2()) {
PM.add(createSSEDomainFixPass());
return true;
}
return false;
}
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
CodeGenOpt::Level OptLevel,
JITCodeEmitter &JCE) {
if (DefRelocModel == Reloc::Default &&
(!Subtarget.isTargetDarwin() || !Subtarget.is64Bit())) {
setRelocationModel(Reloc::Static);
Subtarget.setPICStyle(PICStyles::None);
}
PM.add(createX86JITCodeEmitterPass(*this, JCE));
return false;
}
void X86TargetMachine::setCodeModelForStatic() {
if (getCodeModel() != CodeModel::Default) return;
setCodeModel(CodeModel::Small);
}
void X86TargetMachine::setCodeModelForJIT() {
if (getCodeModel() != CodeModel::Default) return;
if (Subtarget.is64Bit())
setCodeModel(CodeModel::Large);
else
setCodeModel(CodeModel::Small);
}