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8a8d479214
change, now you need a TargetOptions object to create a TargetMachine. Clang patch to follow. One small functionality change in PTX. PTX had commented out the machine verifier parts in their copy of printAndVerify. That now calls the version in LLVMTargetMachine. Users of PTX who need verification disabled should rely on not passing the command-line flag to enable it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145714 91177308-0d34-0410-b5e6-96231b3b80d8
185 lines
8.2 KiB
C++
185 lines
8.2 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 is distributed under the University of Illinois Open Source
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// 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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#include <string>
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namespace llvm {
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class MachineFunction;
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class StringRef;
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// Possible float ABI settings. Used with FloatABIType in TargetOptions.h.
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namespace FloatABI {
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enum ABIType {
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Default, // Target-specific (either soft of hard depending on triple, etc).
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Soft, // Soft float.
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Hard // Hard float.
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};
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}
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/// StrongPHIElim - This flag enables more aggressive PHI elimination
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/// wth earlier copy coalescing.
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extern bool StrongPHIElim;
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class TargetOptions {
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public:
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TargetOptions()
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: PrintMachineCode(false), NoFramePointerElim(false),
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NoFramePointerElimNonLeaf(false), LessPreciseFPMADOption(false),
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NoExcessFPPrecision(false), UnsafeFPMath(false), NoInfsFPMath(false),
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NoNaNsFPMath(false), HonorSignDependentRoundingFPMathOption(false),
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UseSoftFloat(false), NoZerosInBSS(false), JITExceptionHandling(false),
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JITEmitDebugInfo(false), JITEmitDebugInfoToDisk(false),
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GuaranteedTailCallOpt(false), StackAlignmentOverride(0),
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RealignStack(true), DisableJumpTables(false), EnableFastISel(false),
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EnableSegmentedStacks(false), TrapFuncName(""),
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FloatABIType(FloatABI::Default)
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{}
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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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unsigned PrintMachineCode : 1;
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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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unsigned NoFramePointerElim : 1;
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/// NoFramePointerElimNonLeaf - This flag is enabled when the
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/// -disable-non-leaf-fp-elim is specified on the command line. If the
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/// target supports the frame pointer elimination optimization, this option
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/// should disable it for non-leaf functions.
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unsigned NoFramePointerElimNonLeaf : 1;
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/// DisableFramePointerElim - This returns true if frame pointer elimination
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/// optimization should be disabled for the given machine function.
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bool DisableFramePointerElim(const MachineFunction &MF) const;
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/// LessPreciseFPMAD - This flag is enabled when the
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/// -enable-fp-mad is specified on the command line. When this flag is off
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/// (the default), the code generator is not allowed to generate mad
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/// (multiply add) if the result is "less precise" than doing those
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/// operations individually.
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unsigned LessPreciseFPMADOption : 1;
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bool LessPreciseFPMAD() const;
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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.
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/// When this flag is off (the default), the code generator is allowed to
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/// produce results that are "more precise" than IEEE allows. This includes
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/// use of FMA-like operations and use of the X86 FP registers without
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/// rounding all over the place.
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unsigned NoExcessFPPrecision : 1;
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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 LessPreciseFPMAD.
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unsigned UnsafeFPMath : 1;
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/// NoInfsFPMath - This flag is enabled when the
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/// -enable-no-infs-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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/// assume the FP arithmetic arguments and results are never +-Infs.
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unsigned NoInfsFPMath : 1;
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/// NoNaNsFPMath - This flag is enabled when the
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/// -enable-no-nans-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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/// assume the FP arithmetic arguments and results are never NaNs.
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unsigned NoNaNsFPMath : 1;
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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
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/// to 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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unsigned HonorSignDependentRoundingFPMathOption : 1;
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bool HonorSignDependentRoundingFPMath() const;
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/// UseSoftFloat - This flag is enabled when the -soft-float flag is
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/// specified on the command line. When this flag is on, the code generator
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/// will generate libcalls to the software floating point library instead of
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/// target FP instructions.
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unsigned UseSoftFloat : 1;
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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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unsigned NoZerosInBSS : 1;
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/// JITExceptionHandling - This flag indicates that the JIT should emit
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/// exception handling information.
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unsigned JITExceptionHandling : 1;
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/// JITEmitDebugInfo - This flag indicates that the JIT should try to emit
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/// debug information and notify a debugger about it.
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unsigned JITEmitDebugInfo : 1;
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/// JITEmitDebugInfoToDisk - This flag indicates that the JIT should write
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/// the object files generated by the JITEmitDebugInfo flag to disk. This
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/// flag is hidden and is only for debugging the debug info.
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unsigned JITEmitDebugInfoToDisk : 1;
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/// GuaranteedTailCallOpt - This flag is enabled when -tailcallopt is
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/// specified on the commandline. When the flag is on, participating targets
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/// will perform tail call optimization on all calls which use the fastcc
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/// calling convention and which satisfy certain target-independent
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/// criteria (being at the end of a function, having the same return type
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/// as their parent function, etc.), using an alternate ABI if necessary.
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unsigned GuaranteedTailCallOpt : 1;
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/// StackAlignmentOverride - Override default stack alignment for target.
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unsigned StackAlignmentOverride;
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/// RealignStack - This flag indicates whether the stack should be
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/// automatically realigned, if needed.
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unsigned RealignStack : 1;
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/// DisableJumpTables - This flag indicates jump tables should not be
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/// generated.
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unsigned DisableJumpTables : 1;
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/// EnableFastISel - This flag enables fast-path instruction selection
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/// which trades away generated code quality in favor of reducing
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/// compile time.
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unsigned EnableFastISel : 1;
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unsigned EnableSegmentedStacks : 1;
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/// getTrapFunctionName - If this returns a non-empty string, this means
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/// isel should lower Intrinsic::trap to a call to the specified function
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/// name instead of an ISD::TRAP node.
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std::string TrapFuncName;
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StringRef getTrapFunctionName() const;
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/// FloatABIType - This setting is set by -float-abi=xxx option is specfied
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/// on the command line. This setting may either be Default, Soft, or Hard.
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/// Default selects the target's default behavior. Soft selects the ABI for
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/// UseSoftFloat, but does not indicate that FP hardware may not be used.
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/// Such a combination is unfortunately popular (e.g. arm-apple-darwin).
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/// Hard presumes that the normal FP ABI is used.
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FloatABI::ABIType FloatABIType;
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};
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} // End llvm namespace
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#endif
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