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//===-- TargetMachine.cpp - General Target Information ---------------------==//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Type.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 PrintMachineCode;
bool NoFramePointerElim;
bool NoExcessFPPrecision;
bool UnsafeFPMath;
Reloc::Model RelocationModel;
};
namespace {
cl::opt<bool, true> PrintCode("print-machineinstrs",
cl::desc("Print generated machine code"),
cl::location(PrintMachineCode), cl::init(false));
cl::opt<bool, true>
DisableFPElim("disable-fp-elim",
cl::desc("Disable frame pointer elimination optimization"),
cl::location(NoFramePointerElim),
cl::init(false));
cl::opt<bool, true>
DisableExcessPrecision("disable-excess-fp-precision",
cl::desc("Disable optimizations that may increase FP precision"),
cl::location(NoExcessFPPrecision),
cl::init(false));
cl::opt<bool, true>
EnableUnsafeFPMath("enable-unsafe-fp-math",
cl::desc("Enable optimizations that may decrease FP precision"),
cl::location(UnsafeFPMath),
cl::init(false));
cl::opt<llvm::Reloc::Model, true>
DefRelocationModel(
"relocation-model",
cl::desc("Choose relocation model"),
cl::location(RelocationModel),
cl::init(Reloc::Default),
cl::values(
clEnumValN(Reloc::Default, "default",
"Target default relocation model"),
clEnumValN(Reloc::Static, "static",
"Non-relocatable code"),
clEnumValN(Reloc::PIC, "pic",
"Fully relocatable, position independent code"),
clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
"Relocatable external references, non-relocatable code"),
clEnumValEnd));
};
//---------------------------------------------------------------------------
// TargetMachine Class
//
TargetMachine::TargetMachine(const std::string &name, bool LittleEndian,
unsigned char PtrSize, unsigned char PtrAl,
unsigned char DoubleAl, unsigned char FloatAl,
unsigned char LongAl, unsigned char IntAl,
unsigned char ShortAl, unsigned char ByteAl,
unsigned char BoolAl)
: Name(name), DataLayout(name, LittleEndian,
PtrSize, PtrAl, DoubleAl, FloatAl, LongAl,
IntAl, ShortAl, ByteAl, BoolAl) {
}
TargetMachine::TargetMachine(const std::string &name, const TargetData &TD)
: Name(name), DataLayout(TD) {
}
TargetMachine::TargetMachine(const std::string &name, const Module &M)
: Name(name), DataLayout(name, &M) {
}
TargetMachine::~TargetMachine() {
}
/// getRelocationModel - Returns the code generation relocation model. The
/// choices are static, PIC, and dynamic-no-pic, and target default.
Reloc::Model TargetMachine::getRelocationModel() {
return RelocationModel;
}
/// setRelocationModel - Sets the code generation relocation model.
void TargetMachine::setRelocationModel(Reloc::Model Model) {
RelocationModel = Model;
}
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