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79 lines
3.5 KiB
C++
79 lines
3.5 KiB
C++
//===-- llvm/Target/TargetOptions.h - Target Options ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines command line option flags that are shared across various
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// targets.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETOPTIONS_H
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#define LLVM_TARGET_TARGETOPTIONS_H
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namespace llvm {
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/// PrintMachineCode - This flag is enabled when the -print-machineinstrs
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/// option is specified on the command line, and should enable debugging
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/// output from the code generator.
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extern bool PrintMachineCode;
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/// NoFramePointerElim - This flag is enabled when the -disable-fp-elim is
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/// specified on the command line. If the target supports the frame pointer
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/// elimination optimization, this option should disable it.
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extern bool NoFramePointerElim;
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/// NoExcessFPPrecision - This flag is enabled when the
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/// -disable-excess-fp-precision flag is specified on the command line. When
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/// this flag is off (the default), the code generator is allowed to produce
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/// results that are "more precise" than IEEE allows. This includes use of
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/// FMA-like operations and use of the X86 FP registers without rounding all
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/// over the place.
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extern bool NoExcessFPPrecision;
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/// UnsafeFPMath - This flag is enabled when the
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/// -enable-unsafe-fp-math flag is specified on the command line. When
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/// this flag is off (the default), the code generator is not allowed to
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/// produce results that are "less precise" than IEEE allows. This includes
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/// use of X86 instructions like FSIN and FCOS instead of libcalls.
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/// UnsafeFPMath implies FiniteOnlyFPMath.
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extern bool UnsafeFPMath;
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/// FiniteOnlyFPMath - This returns true when the -enable-finite-only-fp-math
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/// option is specified on the command line. If this returns false (default),
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/// the code generator is not allowed to assume that FP arithmetic arguments
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/// and results are never NaNs or +-Infs.
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extern bool FiniteOnlyFPMathOption;
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extern bool FiniteOnlyFPMath();
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/// HonorSignDependentRoundingFPMath - This returns true when the
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/// -enable-sign-dependent-rounding-fp-math is specified. If this returns
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/// false (the default), the code generator is allowed to assume that the
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/// rounding behavior is the default (round-to-zero for all floating point to
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/// integer conversions, and round-to-nearest for all other arithmetic
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/// truncations). If this is enabled (set to true), the code generator must
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/// assume that the rounding mode may dynamically change.
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extern bool HonorSignDependentRoundingFPMathOption;
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extern bool HonorSignDependentRoundingFPMath();
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/// UseSoftFloat - This flag is enabled when the -soft-float flag is specified
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/// on the command line. When this flag is on, the code generator will
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/// generate libcalls to the software floating point library instead of
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/// target FP instructions.
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extern bool UseSoftFloat;
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/// NoZerosInBSS - By default some codegens place zero-initialized data to
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/// .bss section. This flag disables such behaviour (necessary, e.g. for
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/// crt*.o compiling).
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extern bool NoZerosInBSS;
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/// ExceptionHandling - This flag indicates that exception information should
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/// be emitted.
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extern bool ExceptionHandling;
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} // End llvm namespace
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#endif
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