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Expose an option allowing unsafe math optimizations. Patch contributed by

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Morten Ofstad!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21630 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-04-30 04:09:52 +00:00
parent b42a9ffbe9
commit 34f74a6162
2 changed files with 12 additions and 0 deletions
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6
include/llvm/Target/TargetOptions.h
View File

@ -41,6 +41,12 @@ namespace llvm {
/// 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.
extern bool UnsafeFPMath;
} // End llvm namespace
#endif

6
lib/Target/TargetMachine.cpp
View File

@ -26,6 +26,7 @@ namespace llvm {
bool NoFramePointerElim;
bool NoExcessFPPrecision;
int PatternISelTriState;
bool UnsafeFPMath;
};
namespace {
cl::opt<bool, true> PrintCode("print-machineinstrs",
@ -46,6 +47,11 @@ namespace {
cl::desc("sets the pattern ISel off(0), on(1), default(2)"),
cl::location(PatternISelTriState),
cl::init(2));
cl::opt<bool, true>
EnableUnsafeFPMath("enable-unsafe-fp-math",
cl::desc("Enable optimizations that may decrease FP precision"),
cl::location(UnsafeFPMath),
cl::init(false));
};
//---------------------------------------------------------------------------