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re PR c/46946 (contradiction in docs for -Ofast and -ffast-math)

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2011-01-12  Richard Guenther  <rguenther@suse.de>

	PR other/46946
	* doc/invoke.texi (ffast-math): Document it is turned on
	with -Ofast.

From-SVN: r168709
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Richard Guenther 2011-01-12 12:07:44 +00:00 committed by Richard Biener
parent 47782a9d27
commit a570fc16fa
2 changed files with 10 additions and 4 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-01-12 Richard Guenther <rguenther@suse.de>
PR other/46946
* doc/invoke.texi (ffast-math): Document it is turned on
with -Ofast.
2011-01-12 Jan Hubicka <jh@suse.cz>
PR tree-optimization/47233

8
gcc/doc/invoke.texi
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@ -7792,10 +7792,10 @@ Sets @option{-fno-math-errno}, @option{-funsafe-math-optimizations},
This option causes the preprocessor macro @code{__FAST_MATH__} to be defined.
This option is not turned on by any @option{-O} option since
it can result in incorrect output for programs which depend on
an exact implementation of IEEE or ISO rules/specifications for
math functions. It may, however, yield faster code for programs
This option is not turned on by any @option{-O} option besides
@option{-Ofast} since it can result in incorrect output for programs
which depend on an exact implementation of IEEE or ISO rules/specifications
for math functions. It may, however, yield faster code for programs
that do not require the guarantees of these specifications.
@item -fno-math-errno