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llvm-mirror/lib/Target/TargetMachine.cpp

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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/Type.h"
#include "llvm/CodeGen/IntrinsicLowering.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;
int PatternISelTriState;
bool UnsafeFPMath;
bool PICEnabled;
};
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<int, true> PatternISel("enable-pattern-isel",
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cl::desc("Turn the pattern ISel off(0), on(1), default(2)"),
cl::location(PatternISelTriState),
cl::init(2));
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<bool, true>
EnablePIC("enable-pic",
cl::desc("Enable generation of position independant code"),
cl::location(PICEnabled),
cl::init(false));
};
//---------------------------------------------------------------------------
// TargetMachine Class
//
TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il,
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) {
IL = il ? il : new DefaultIntrinsicLowering();
}
TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il,
const TargetData &TD)
: Name(name), DataLayout(TD) {
IL = il ? il : new DefaultIntrinsicLowering();
}
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TargetMachine::TargetMachine(const std::string &name, IntrinsicLowering *il,
const Module &M)
: Name(name), DataLayout(name, &M) {
IL = il ? il : new DefaultIntrinsicLowering();
}
TargetMachine::~TargetMachine() {
delete IL;
}