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Add a new option.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36657 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -49,6 +49,22 @@ namespace llvm {
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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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/// 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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/// 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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@ -54,20 +54,27 @@ namespace {
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cl::location(UnsafeFPMath),
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cl::init(false));
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cl::opt<bool, true>
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EnableFiniteOnltFPMath("enable-finite-only-fp-math",
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EnableFiniteOnlyFPMath("enable-finite-only-fp-math",
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cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"),
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cl::location(FiniteOnlyFPMathOption),
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cl::init(false));
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cl::opt<bool, true>
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EnableHonorSignDependentRoundingFPMath(cl::Hidden,
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"enable-sign-dependent-rounding-fp-math",
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cl::desc("Force codegen to assume rounding mode can change dynamically"),
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cl::location(HonorSignDependentRoundingFPMathOption),
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cl::init(false));
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cl::opt<bool, true>
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GenerateSoftFloatCalls("soft-float",
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cl::desc("Generate software floating point library calls"),
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cl::location(UseSoftFloat),
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cl::init(false));
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cl::opt<bool, true>
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DontPlaceZerosInBSS("nozero-initialized-in-bss",
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cl::desc("Don't place zero-initialized symbols into bss section"),
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cl::location(NoZerosInBSS),
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cl::init(false));
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cl::desc("Don't place zero-initialized symbols into bss section"),
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cl::location(NoZerosInBSS),
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cl::init(false));
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cl::opt<bool, true>
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EnableExceptionHandling("enable-eh",
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cl::desc("Exception handling should be emitted."),
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@ -146,5 +153,11 @@ namespace llvm {
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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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bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; }
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/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
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/// that the rounding mode of the FPU can change from its default.
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bool HonorSignDependentRoundingFPMath() {
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return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
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}
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}
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