http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54027
--- Comment #2 from joseph at codesourcery dot com 2012-07-19 15:07:54 UTC ---
On Thu, 19 Jul 2012, rguenth at gcc dot gnu.org wrote:
> Isn't it invoking undefined behavior by means of a signed integer overflow?
> (if shifts are not defined in te
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54027
--- Comment #1 from Richard Guenther 2012-07-19
10:07:11 UTC ---
Isn't it invoking undefined behavior by means of a signed integer overflow?
(if shifts are not defined in terms of multiplies we may not internally
fold x << 1 to x * 2).
