//===-- 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/TargetAsmInfo.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Type.h"
-#include "llvm/IntrinsicLowering.h"
-#include "Support/CommandLine.h"
+#include "llvm/Target/TargetOptions.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 {
+namespace llvm {
bool PrintMachineCode;
-};
+ bool NoFramePointerElim;
+ bool NoExcessFPPrecision;
+ bool UnsafeFPMath;
+ bool FiniteOnlyFPMathOption;
+ bool HonorSignDependentRoundingFPMathOption;
+ bool UseSoftFloat;
+ bool NoZerosInBSS;
+ bool ExceptionHandling;
+ bool NewCCModeling;
+ Reloc::Model RelocationModel;
+ CodeModel::Model CMModel;
+}
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<bool, true>
+ EnableFiniteOnlyFPMath("enable-finite-only-fp-math",
+ cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"),
+ cl::location(FiniteOnlyFPMathOption),
+ cl::init(false));
+ cl::opt<bool, true>
+ EnableHonorSignDependentRoundingFPMath(cl::Hidden,
+ "enable-sign-dependent-rounding-fp-math",
+ cl::desc("Force codegen to assume rounding mode can change dynamically"),
+ cl::location(HonorSignDependentRoundingFPMathOption),
+ cl::init(false));
+
+ cl::opt<bool, true>
+ GenerateSoftFloatCalls("soft-float",
+ cl::desc("Generate software floating point library calls"),
+ cl::location(UseSoftFloat),
+ cl::init(false));
+ cl::opt<bool, true>
+ DontPlaceZerosInBSS("nozero-initialized-in-bss",
+ cl::desc("Don't place zero-initialized symbols into bss section"),
+ cl::location(NoZerosInBSS),
+ cl::init(false));
+ cl::opt<bool, true>
+ EnableExceptionHandling("enable-eh",
+ cl::desc("Exception handling should be emitted."),
+ cl::location(ExceptionHandling),
+ 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));
+ cl::opt<llvm::CodeModel::Model, true>
+ DefCodeModel(
+ "code-model",
+ cl::desc("Choose code model"),
+ cl::location(CMModel),
+ cl::init(CodeModel::Default),
+ cl::values(
+ clEnumValN(CodeModel::Default, "default",
+ " Target default code model"),
+ clEnumValN(CodeModel::Small, "small",
+ " Small code model"),
+ clEnumValN(CodeModel::Kernel, "kernel",
+ " Kernel code model"),
+ clEnumValN(CodeModel::Medium, "medium",
+ " Medium code model"),
+ clEnumValN(CodeModel::Large, "large",
+ " Large code model"),
+ clEnumValEnd));
+ cl::opt<bool, true>
+ EnableNewCCModeling("new-cc-modeling-scheme",
+ cl::desc("New CC modeling scheme."),
+ cl::location(NewCCModeling),
+ 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)
- : Name(name), DataLayout(name, LittleEndian,
- PtrSize, PtrAl, DoubleAl, FloatAl, LongAl,
- IntAl, ShortAl, ByteAl) {
- IL = il ? il : new DefaultIntrinsicLowering();
-}
-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;
+ delete AsmInfo;
}
-unsigned TargetMachine::findOptimalStorageSize(const Type *Ty) const {
- // All integer types smaller than ints promote to 4 byte integers.
- if (Ty->isIntegral() && Ty->getPrimitiveSize() < 4)
- return 4;
+/// 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;
+}
+
+/// getCodeModel - Returns the code model. The choices are small, kernel,
+/// medium, large, and target default.
+CodeModel::Model TargetMachine::getCodeModel() {
+ return CMModel;
+}
+
+/// setCodeModel - Sets the code model.
+void TargetMachine::setCodeModel(CodeModel::Model Model) {
+ CMModel = Model;
+}
- return DataLayout.getTypeSize(Ty);
+namespace llvm {
+ /// FiniteOnlyFPMath - This returns true when the -enable-finite-only-fp-math
+ /// option is specified on the command line. If this returns false (default),
+ /// the code generator is not allowed to assume that FP arithmetic arguments
+ /// and results are never NaNs or +-Infs.
+ bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; }
+
+ /// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
+ /// that the rounding mode of the FPU can change from its default.
+ bool HonorSignDependentRoundingFPMath() {
+ return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
+ }
}
+
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