165 lines
4.8 KiB
C++
165 lines
4.8 KiB
C++
//===-- TargetMachine.cpp - General Target Information ---------------------==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file describes the general parts of a Target machine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/GlobalAlias.h"
|
|
#include "llvm/GlobalValue.h"
|
|
#include "llvm/GlobalVariable.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCCodeGenInfo.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Command-line options that tend to be useful on more than one back-end.
|
|
//
|
|
|
|
namespace llvm {
|
|
bool HasDivModLibcall;
|
|
bool AsmVerbosityDefault(false);
|
|
}
|
|
|
|
static cl::opt<bool>
|
|
DataSections("fdata-sections",
|
|
cl::desc("Emit data into separate sections"),
|
|
cl::init(false));
|
|
static cl::opt<bool>
|
|
FunctionSections("ffunction-sections",
|
|
cl::desc("Emit functions into separate sections"),
|
|
cl::init(false));
|
|
|
|
//---------------------------------------------------------------------------
|
|
// TargetMachine Class
|
|
//
|
|
|
|
TargetMachine::TargetMachine(const Target &T,
|
|
StringRef TT, StringRef CPU, StringRef FS,
|
|
const TargetOptions &Options)
|
|
: TheTarget(T), TargetTriple(TT), TargetCPU(CPU), TargetFS(FS),
|
|
CodeGenInfo(0), AsmInfo(0),
|
|
MCRelaxAll(false),
|
|
MCNoExecStack(false),
|
|
MCSaveTempLabels(false),
|
|
MCUseLoc(true),
|
|
MCUseCFI(true),
|
|
MCUseDwarfDirectory(false),
|
|
Options(Options) {
|
|
}
|
|
|
|
TargetMachine::~TargetMachine() {
|
|
delete CodeGenInfo;
|
|
delete AsmInfo;
|
|
}
|
|
|
|
/// getRelocationModel - Returns the code generation relocation model. The
|
|
/// choices are static, PIC, and dynamic-no-pic, and target default.
|
|
Reloc::Model TargetMachine::getRelocationModel() const {
|
|
if (!CodeGenInfo)
|
|
return Reloc::Default;
|
|
return CodeGenInfo->getRelocationModel();
|
|
}
|
|
|
|
/// getCodeModel - Returns the code model. The choices are small, kernel,
|
|
/// medium, large, and target default.
|
|
CodeModel::Model TargetMachine::getCodeModel() const {
|
|
if (!CodeGenInfo)
|
|
return CodeModel::Default;
|
|
return CodeGenInfo->getCodeModel();
|
|
}
|
|
|
|
/// Get the IR-specified TLS model for Var.
|
|
static TLSModel::Model getSelectedTLSModel(const GlobalVariable *Var) {
|
|
switch (Var->getThreadLocalMode()) {
|
|
case GlobalVariable::NotThreadLocal:
|
|
llvm_unreachable("getSelectedTLSModel for non-TLS variable");
|
|
break;
|
|
case GlobalVariable::GeneralDynamicTLSModel:
|
|
return TLSModel::GeneralDynamic;
|
|
case GlobalVariable::LocalDynamicTLSModel:
|
|
return TLSModel::LocalDynamic;
|
|
case GlobalVariable::InitialExecTLSModel:
|
|
return TLSModel::InitialExec;
|
|
case GlobalVariable::LocalExecTLSModel:
|
|
return TLSModel::LocalExec;
|
|
}
|
|
llvm_unreachable("invalid TLS model");
|
|
}
|
|
|
|
TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const {
|
|
// If GV is an alias then use the aliasee for determining
|
|
// thread-localness.
|
|
if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
|
|
GV = GA->resolveAliasedGlobal(false);
|
|
const GlobalVariable *Var = cast<GlobalVariable>(GV);
|
|
|
|
bool isLocal = Var->hasLocalLinkage();
|
|
bool isDeclaration = Var->isDeclaration();
|
|
bool isPIC = getRelocationModel() == Reloc::PIC_;
|
|
bool isPIE = Options.PositionIndependentExecutable;
|
|
// FIXME: what should we do for protected and internal visibility?
|
|
// For variables, is internal different from hidden?
|
|
bool isHidden = Var->hasHiddenVisibility();
|
|
|
|
TLSModel::Model Model;
|
|
if (isPIC && !isPIE) {
|
|
if (isLocal || isHidden)
|
|
Model = TLSModel::LocalDynamic;
|
|
else
|
|
Model = TLSModel::GeneralDynamic;
|
|
} else {
|
|
if (!isDeclaration || isHidden)
|
|
Model = TLSModel::LocalExec;
|
|
else
|
|
Model = TLSModel::InitialExec;
|
|
}
|
|
|
|
// If the user specified a more specific model, use that.
|
|
TLSModel::Model SelectedModel = getSelectedTLSModel(Var);
|
|
if (SelectedModel > Model)
|
|
return SelectedModel;
|
|
|
|
return Model;
|
|
}
|
|
|
|
/// getOptLevel - Returns the optimization level: None, Less,
|
|
/// Default, or Aggressive.
|
|
CodeGenOpt::Level TargetMachine::getOptLevel() const {
|
|
if (!CodeGenInfo)
|
|
return CodeGenOpt::Default;
|
|
return CodeGenInfo->getOptLevel();
|
|
}
|
|
|
|
bool TargetMachine::getAsmVerbosityDefault() {
|
|
return AsmVerbosityDefault;
|
|
}
|
|
|
|
void TargetMachine::setAsmVerbosityDefault(bool V) {
|
|
AsmVerbosityDefault = V;
|
|
}
|
|
|
|
bool TargetMachine::getFunctionSections() {
|
|
return FunctionSections;
|
|
}
|
|
|
|
bool TargetMachine::getDataSections() {
|
|
return DataSections;
|
|
}
|
|
|
|
void TargetMachine::setFunctionSections(bool V) {
|
|
FunctionSections = V;
|
|
}
|
|
|
|
void TargetMachine::setDataSections(bool V) {
|
|
DataSections = V;
|
|
}
|