mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 04:29:57 +00:00
instead of requiring all "short description" strings to begin with two spaces. This makes these strings less mysterious, and it fixes some cases where short description strings mistakenly did not begin with two spaces. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57521 91177308-0d34-0410-b5e6-96231b3b80d8
211 lines
7.4 KiB
C++
211 lines
7.4 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/Target/TargetAsmInfo.h"
|
|
#include "llvm/Target/TargetMachine.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 {
|
|
bool PrintMachineCode;
|
|
bool NoFramePointerElim;
|
|
bool NoExcessFPPrecision;
|
|
bool UnsafeFPMath;
|
|
bool FiniteOnlyFPMathOption;
|
|
bool HonorSignDependentRoundingFPMathOption;
|
|
bool UseSoftFloat;
|
|
bool NoZerosInBSS;
|
|
bool ExceptionHandling;
|
|
bool UnwindTablesMandatory;
|
|
Reloc::Model RelocationModel;
|
|
CodeModel::Model CMModel;
|
|
bool PerformTailCallOpt;
|
|
unsigned StackAlignment;
|
|
bool RealignStack;
|
|
bool VerboseAsm;
|
|
bool DisableJumpTables;
|
|
bool StrongPHIElim;
|
|
}
|
|
|
|
static cl::opt<bool, true> PrintCode("print-machineinstrs",
|
|
cl::desc("Print generated machine code"),
|
|
cl::location(PrintMachineCode), cl::init(false));
|
|
|
|
static cl::opt<bool, true>
|
|
DisableFPElim("disable-fp-elim",
|
|
cl::desc("Disable frame pointer elimination optimization"),
|
|
cl::location(NoFramePointerElim),
|
|
cl::init(false));
|
|
static cl::opt<bool, true>
|
|
DisableExcessPrecision("disable-excess-fp-precision",
|
|
cl::desc("Disable optimizations that may increase FP precision"),
|
|
cl::location(NoExcessFPPrecision),
|
|
cl::init(false));
|
|
static cl::opt<bool, true>
|
|
EnableUnsafeFPMath("enable-unsafe-fp-math",
|
|
cl::desc("Enable optimizations that may decrease FP precision"),
|
|
cl::location(UnsafeFPMath),
|
|
cl::init(false));
|
|
static 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));
|
|
static 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));
|
|
|
|
static cl::opt<bool, true>
|
|
GenerateSoftFloatCalls("soft-float",
|
|
cl::desc("Generate software floating point library calls"),
|
|
cl::location(UseSoftFloat),
|
|
cl::init(false));
|
|
static 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));
|
|
static cl::opt<bool, true>
|
|
EnableExceptionHandling("enable-eh",
|
|
cl::desc("Emit DWARF exception handling (default if target supports)"),
|
|
cl::location(ExceptionHandling),
|
|
cl::init(false));
|
|
static cl::opt<bool, true>
|
|
EnableUnwindTables("unwind-tables",
|
|
cl::desc("Generate unwinding tables for all functions"),
|
|
cl::location(UnwindTablesMandatory),
|
|
cl::init(false));
|
|
|
|
static 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));
|
|
static 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));
|
|
|
|
static cl::opt<bool, true>
|
|
EnablePerformTailCallOpt("tailcallopt",
|
|
cl::desc("Turn on tail call optimization."),
|
|
cl::location(PerformTailCallOpt),
|
|
cl::init(false));
|
|
|
|
static cl::opt<unsigned, true>
|
|
OverrideStackAlignment("stack-alignment",
|
|
cl::desc("Override default stack alignment"),
|
|
cl::location(StackAlignment),
|
|
cl::init(0));
|
|
|
|
static cl::opt<bool, true>
|
|
EnableRealignStack("realign-stack",
|
|
cl::desc("Realign stack if needed"),
|
|
cl::location(RealignStack),
|
|
cl::init(true));
|
|
|
|
static cl::opt<bool, true>
|
|
AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
|
|
cl::location(VerboseAsm),
|
|
cl::init(false));
|
|
|
|
static cl::opt<bool, true>
|
|
DisableSwitchTables(cl::Hidden, "disable-jump-tables",
|
|
cl::desc("Do not generate jump tables."),
|
|
cl::location(DisableJumpTables),
|
|
cl::init(false));
|
|
|
|
static cl::opt<bool, true>
|
|
EnableStrongPHIElim(cl::Hidden, "strong-phi-elim",
|
|
cl::desc("Use strong PHI elimination."),
|
|
cl::location(StrongPHIElim),
|
|
cl::init(false));
|
|
|
|
//---------------------------------------------------------------------------
|
|
// TargetMachine Class
|
|
//
|
|
|
|
TargetMachine::~TargetMachine() {
|
|
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() {
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|