mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 16:33:37 +01:00
163 lines
7.1 KiB
C++
163 lines
7.1 KiB
C++
//===-- llvm/Target/TargetOptions.h - Target Options ------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines command line option flags that are shared across various
|
|
// targets.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_TARGETOPTIONS_H
|
|
#define LLVM_TARGET_TARGETOPTIONS_H
|
|
|
|
namespace llvm {
|
|
class MachineFunction;
|
|
|
|
// Possible float ABI settings. Used with FloatABIType in TargetOptions.h.
|
|
namespace FloatABI {
|
|
enum ABIType {
|
|
Default, // Target-specific (either soft of hard depending on triple, etc).
|
|
Soft, // Soft float.
|
|
Hard // Hard float.
|
|
};
|
|
}
|
|
|
|
/// PrintMachineCode - This flag is enabled when the -print-machineinstrs
|
|
/// option is specified on the command line, and should enable debugging
|
|
/// output from the code generator.
|
|
extern bool PrintMachineCode;
|
|
|
|
/// NoFramePointerElim - This flag is enabled when the -disable-fp-elim is
|
|
/// specified on the command line. If the target supports the frame pointer
|
|
/// elimination optimization, this option should disable it.
|
|
extern bool NoFramePointerElim;
|
|
|
|
/// NoFramePointerElimNonLeaf - This flag is enabled when the
|
|
/// -disable-non-leaf-fp-elim is specified on the command line. If the target
|
|
/// supports the frame pointer elimination optimization, this option should
|
|
/// disable it for non-leaf functions.
|
|
extern bool NoFramePointerElimNonLeaf;
|
|
|
|
/// DisableFramePointerElim - This returns true if frame pointer elimination
|
|
/// optimization should be disabled for the given machine function.
|
|
extern bool DisableFramePointerElim(const MachineFunction &MF);
|
|
|
|
/// LessPreciseFPMAD - This flag is enabled when the
|
|
/// -enable-fp-mad is specified on the command line. When this flag is off
|
|
/// (the default), the code generator is not allowed to generate mad
|
|
/// (multiply add) if the result is "less precise" than doing those operations
|
|
/// individually.
|
|
extern bool LessPreciseFPMADOption;
|
|
extern bool LessPreciseFPMAD();
|
|
|
|
/// NoExcessFPPrecision - This flag is enabled when the
|
|
/// -disable-excess-fp-precision flag is specified on the command line. When
|
|
/// this flag is off (the default), the code generator is allowed to produce
|
|
/// results that are "more precise" than IEEE allows. This includes use of
|
|
/// FMA-like operations and use of the X86 FP registers without rounding all
|
|
/// over the place.
|
|
extern bool NoExcessFPPrecision;
|
|
|
|
/// UnsafeFPMath - This flag is enabled when the
|
|
/// -enable-unsafe-fp-math flag is specified on the command line. When
|
|
/// this flag is off (the default), the code generator is not allowed to
|
|
/// produce results that are "less precise" than IEEE allows. This includes
|
|
/// use of X86 instructions like FSIN and FCOS instead of libcalls.
|
|
/// UnsafeFPMath implies LessPreciseFPMAD.
|
|
extern bool UnsafeFPMath;
|
|
|
|
/// NoInfsFPMath - This flag is enabled when the
|
|
/// -enable-no-infs-fp-math flag is specified on the command line. When
|
|
/// this flag is off (the default), the code generator is not allowed to
|
|
/// assume the FP arithmetic arguments and results are never +-Infs.
|
|
extern bool NoInfsFPMath;
|
|
|
|
/// NoNaNsFPMath - This flag is enabled when the
|
|
/// -enable-no-nans-fp-math flag is specified on the command line. When
|
|
/// this flag is off (the default), the code generator is not allowed to
|
|
/// assume the FP arithmetic arguments and results are never NaNs.
|
|
extern bool NoNaNsFPMath;
|
|
|
|
/// HonorSignDependentRoundingFPMath - This returns true when the
|
|
/// -enable-sign-dependent-rounding-fp-math is specified. If this returns
|
|
/// false (the default), the code generator is allowed to assume that the
|
|
/// rounding behavior is the default (round-to-zero for all floating point to
|
|
/// integer conversions, and round-to-nearest for all other arithmetic
|
|
/// truncations). If this is enabled (set to true), the code generator must
|
|
/// assume that the rounding mode may dynamically change.
|
|
extern bool HonorSignDependentRoundingFPMathOption;
|
|
extern bool HonorSignDependentRoundingFPMath();
|
|
|
|
/// UseSoftFloat - This flag is enabled when the -soft-float flag is specified
|
|
/// on the command line. When this flag is on, the code generator will
|
|
/// generate libcalls to the software floating point library instead of
|
|
/// target FP instructions.
|
|
extern bool UseSoftFloat;
|
|
|
|
/// FloatABIType - This setting is set by -float-abi=xxx option is specfied
|
|
/// on the command line. This setting may either be Default, Soft, or Hard.
|
|
/// Default selects the target's default behavior. Soft selects the ABI for
|
|
/// UseSoftFloat, but does not inidcate that FP hardware may not be used.
|
|
/// Such a combination is unfortunately popular (e.g. arm-apple-darwin).
|
|
/// Hard presumes that the normal FP ABI is used.
|
|
extern FloatABI::ABIType FloatABIType;
|
|
|
|
/// NoZerosInBSS - By default some codegens place zero-initialized data to
|
|
/// .bss section. This flag disables such behaviour (necessary, e.g. for
|
|
/// crt*.o compiling).
|
|
extern bool NoZerosInBSS;
|
|
|
|
/// JITExceptionHandling - This flag indicates that the JIT should emit
|
|
/// exception handling information.
|
|
extern bool JITExceptionHandling;
|
|
|
|
/// JITEmitDebugInfo - This flag indicates that the JIT should try to emit
|
|
/// debug information and notify a debugger about it.
|
|
extern bool JITEmitDebugInfo;
|
|
|
|
/// JITEmitDebugInfoToDisk - This flag indicates that the JIT should write
|
|
/// the object files generated by the JITEmitDebugInfo flag to disk. This
|
|
/// flag is hidden and is only for debugging the debug info.
|
|
extern bool JITEmitDebugInfoToDisk;
|
|
|
|
/// UnwindTablesMandatory - This flag indicates that unwind tables should
|
|
/// be emitted for all functions.
|
|
extern bool UnwindTablesMandatory;
|
|
|
|
/// GuaranteedTailCallOpt - This flag is enabled when -tailcallopt is
|
|
/// specified on the commandline. When the flag is on, participating targets
|
|
/// will perform tail call optimization on all calls which use the fastcc
|
|
/// calling convention and which satisfy certain target-independent
|
|
/// criteria (being at the end of a function, having the same return type
|
|
/// as their parent function, etc.), using an alternate ABI if necessary.
|
|
extern bool GuaranteedTailCallOpt;
|
|
|
|
/// StackAlignment - Override default stack alignment for target.
|
|
extern unsigned StackAlignment;
|
|
|
|
/// RealignStack - This flag indicates whether the stack should be
|
|
/// automatically realigned, if needed.
|
|
extern bool RealignStack;
|
|
|
|
/// DisableJumpTables - This flag indicates jump tables should not be
|
|
/// generated.
|
|
extern bool DisableJumpTables;
|
|
|
|
/// EnableFastISel - This flag enables fast-path instruction selection
|
|
/// which trades away generated code quality in favor of reducing
|
|
/// compile time.
|
|
extern bool EnableFastISel;
|
|
|
|
/// StrongPHIElim - This flag enables more aggressive PHI elimination
|
|
/// wth earlier copy coalescing.
|
|
extern bool StrongPHIElim;
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|