http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53385
Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |glisse at gcc dot gnu.org --- Comment #6 from Marc Glisse <glisse at gcc dot gnu.org> 2012-05-17 13:00:34 UTC --- (In reply to comment #4) > Here's the problem. Compiled with -m64 -O2, this > > int f (long val) > { > int i; > > if (val < 0) > i = -1; > else > for (i = 0; i < 64; i++) > if ((val <<= 1) < 0) > break; > > return i; > } Is that just a -fwrapv issue?