//===-- 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.
-// This file also implements MachineInstrInfo and MachineCacheInfo.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MachineInstrInfo.h"
-#include "llvm/Target/MachineCacheInfo.h"
-#include "llvm/DerivedTypes.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Type.h"
+#include "llvm/Support/CommandLine.h"
+using namespace llvm;
//---------------------------------------------------------------------------
-// class TargetMachine
-//
-// Purpose:
-// Machine description.
-//
-//---------------------------------------------------------------------------
-
-
-// function TargetMachine::findOptimalStorageSize
-//
-// Purpose:
-// This default implementation assumes that all sub-word data items use
-// space equal to optSizeForSubWordData, and all other primitive data
-// items use space according to the type.
-//
-unsigned int
-TargetMachine::findOptimalStorageSize(const Type* ty) const
-{
- switch(ty->getPrimitiveID())
- {
- case Type::BoolTyID:
- case Type::UByteTyID:
- case Type::SByteTyID:
- case Type::UShortTyID:
- case Type::ShortTyID:
- return optSizeForSubWordData;
-
- default:
- return DataLayout.getTypeSize(ty);
- }
-}
+// 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));
+};
//---------------------------------------------------------------------------
-// class MachineInstructionInfo
-// Interface to description of machine instructions
-//---------------------------------------------------------------------------
-
-
-/*ctor*/
-MachineInstrInfo::MachineInstrInfo(const TargetMachine& tgt,
- const MachineInstrDescriptor* _desc,
- unsigned int _descSize,
- unsigned int _numRealOpCodes)
- : target(tgt),
- desc(_desc), descSize(_descSize), numRealOpCodes(_numRealOpCodes)
-{
- // FIXME: TargetInstrDescriptors should not be global
- assert(TargetInstrDescriptors == NULL && desc != NULL);
- TargetInstrDescriptors = desc; // initialize global variable
-}
-
-
-MachineInstrInfo::~MachineInstrInfo()
-{
- TargetInstrDescriptors = NULL; // reset global variable
+// 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) {
}
-
-bool
-MachineInstrInfo::constantFitsInImmedField(MachineOpCode opCode,
- int64_t intValue) const
-{
- // First, check if opCode has an immed field.
- bool isSignExtended;
- uint64_t maxImmedValue = maxImmedConstant(opCode, isSignExtended);
- if (maxImmedValue != 0)
- {
- // Now check if the constant fits
- if (intValue <= (int64_t) maxImmedValue &&
- intValue >= -((int64_t) maxImmedValue+1))
- return true;
- }
-
- return false;
+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) {
+}
-//---------------------------------------------------------------------------
-// class MachineCacheInfo
-//
-// Purpose:
-// Describes properties of the target cache architecture.
-//---------------------------------------------------------------------------
+TargetMachine::~TargetMachine() {
+}
-/*ctor*/
-MachineCacheInfo::MachineCacheInfo(const TargetMachine& tgt)
- : target(tgt)
-{
- Initialize();
+/// 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;
}
-void
-MachineCacheInfo::Initialize()
-{
- numLevels = 2;
- cacheLineSizes.push_back(16); cacheLineSizes.push_back(32);
- cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20);
- cacheAssoc.push_back(1); cacheAssoc.push_back(4);
+/// setRelocationModel - Sets the code generation relocation model.
+void TargetMachine::setRelocationModel(Reloc::Model Model) {
+ RelocationModel = Model;
}