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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36657 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-03 00:16:07 +00:00
parent ddd35321fb
commit aa4f1e164b
2 changed files with 33 additions and 4 deletions
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16
include/llvm/Target/TargetOptions.h
View File

@ -49,6 +49,22 @@ namespace llvm {
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();
/// 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();
/// 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

21
lib/Target/TargetMachine.cpp
View File

@ -54,20 +54,27 @@ namespace {
cl::location(UnsafeFPMath),
cl::init(false));
cl::opt<bool, true>
EnableFiniteOnltFPMath("enable-finite-only-fp-math",
EnableFiniteOnlyFPMath("enable-finite-only-fp-math",
cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"),
cl::location(FiniteOnlyFPMathOption),
cl::init(false));
cl::opt<bool, true>
EnableHonorSignDependentRoundingFPMath(cl::Hidden,
"enable-sign-dependent-rounding-fp-math",
cl::desc("Force codegen to assume rounding mode can change dynamically"),
cl::location(HonorSignDependentRoundingFPMathOption),
cl::init(false));
cl::opt<bool, true>
GenerateSoftFloatCalls("soft-float",
cl::desc("Generate software floating point library calls"),
cl::location(UseSoftFloat),
cl::init(false));
cl::opt<bool, true>
DontPlaceZerosInBSS("nozero-initialized-in-bss",
cl::desc("Don't place zero-initialized symbols into bss section"),
cl::location(NoZerosInBSS),
cl::init(false));
cl::desc("Don't place zero-initialized symbols into bss section"),
cl::location(NoZerosInBSS),
cl::init(false));
cl::opt<bool, true>
EnableExceptionHandling("enable-eh",
cl::desc("Exception handling should be emitted."),
@ -146,5 +153,11 @@ namespace llvm {
/// the code generator is not allowed to assume that FP arithmetic arguments
/// and results are never NaNs or +-Infs.
bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; }
/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
/// that the rounding mode of the FPU can change from its default.
bool HonorSignDependentRoundingFPMath() {
return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
}
}