[Bug middle-end/30568] -ftrapping-math should prevent folding/dead code stripping of some builtins

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-01-24 06:54 -------
Part of the problem here is that darwin turns on no math-errno by default which
turns the builtin functions into pure functions and since we don't use the 
result, we DCE it.
pure functions are not allowed to trap IIRC the rules.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30568