[Bug other/18665] [3.4/4.0 Regression] -ftrapv borks up simple integer arithmetic

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2004-12-11 09:39 -------
> Since the symbol exists in 3.3 (which I'd forgotten), we have to keep it.
> But I don't see any reason we can't fix the bug in its implementation.
> So let's do proper simode arithmetic.

Agreed.  It turns out that the same problem exists for DImode arithmetic on
targets for which the word_mode is smaller than SImode: since the di variants
were always emitted, should we still emit them now?  Can the big __mulvdi3
routine contained in libgcc2.c be compiled with real DImode on those targets?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18665