//===-- 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; /// 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; /// StackAlignmentOverride - Override default stack alignment for target. extern unsigned StackAlignmentOverride; /// 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; /// getTrapFunctionName - If this returns a non-empty string, this means isel /// should lower Intrinsic::trap to a call to the specified function name /// instead of an ISD::TRAP node. extern StringRef getTrapFunctionName(); } // End llvm namespace #endif