------- Comment #8 from joseph at codesourcery dot com 2006-09-23 22:19 ------- Subject: Re: optimzation breaks floating point exception flag reading
On Sat, 23 Sep 2006, kreckel at ginac dot de wrote: > > > ------- Comment #7 from kreckel at ginac dot de 2006-09-23 22:11 ------- > (In reply to comment #6) > > Use -frounding-math to enable FENV_ACCESS for the whole translation unit, > > Sorry, I fail to see what -frounding-math has to do with this. The example in > comment #5 was about overflows and divisions by zero. Anyway, adding > -frounding-math does not change anything in the case at hand. Exceptions are meant to be covered by -ftrapping-math, which is on by default; with -frounding-math the whole of FENV_ACCESS should be enabled. Although we don't implement the pragmas for control of these features in particular regions of code, we *do* have options that are meant to enable them for whole translation units. So any failure of those options to disable problem optimizations is a bug which is *not* a duplicate of the lack of the pragmas. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29186
