//===-- llvm/Target/TargetOptions.h - Target Options ------------*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// 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
#define LLVM_TARGET_TARGETOPTIONS_H
namespace llvm {
+ // 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.
/// elimination optimization, this option should disable it.
extern bool NoFramePointerElim;
+ /// 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
/// over the place.
extern bool NoExcessFPPrecision;
- /// PatternISelTriState - This flag is enabled when -pattern-isel=X is
- /// specified on the command line. The default value is 2, in which case the
- /// target chooses what is best for it. Setting X to 0 forces the use of
- /// a simple ISel if available, while setting it to 1 forces the use of a
- /// pattern ISel if available.
- extern int PatternISelTriState;
+ /// 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 FiniteOnlyFPMath and LessPreciseFPMAD.
+ extern bool UnsafeFPMath;
+
+ /// 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.
+ extern bool FiniteOnlyFPMathOption;
+ extern bool FiniteOnlyFPMath();
+
+ /// 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;
+
+ /// ExceptionHandling - This flag indicates that exception information should
+ /// be emitted.
+ extern bool ExceptionHandling;
+
+ /// UnwindTablesMandatory - This flag indicates that unwind tables should
+ /// be emitted for all functions.
+ extern bool UnwindTablesMandatory;
+
+ /// PerformTailCallOpt - This flag is enabled when -tailcallopt is specified
+ /// on the commandline. When the flag is on, the target will perform tail call
+ /// optimization (pop the caller's stack) providing it supports it.
+ extern bool PerformTailCallOpt;
+
+ /// StackAlignment - Override default stack alignment for target.
+ extern unsigned StackAlignment;
+
+ /// RealignStack - This flag indicates, whether 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
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