This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug c/66348] Simple loop has only lower half of the 64-bit counter initialized correctly
- From: "sebastiano.vigna at unimi dot it" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 02 Jun 2015 07:23:38 +0000
- Subject: [Bug c/66348] Simple loop has only lower half of the 64-bit counter initialized correctly
- Auto-submitted: auto-generated
- References: <bug-66348-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66348
--- Comment #6 from Sebastiano Vigna <sebastiano.vigna at unimi dot it> ---
I forgot an important aspect: with -fsanitize=undefined the optimization bug
does not show up. The instrumentation perturbs the code enough to make it go
away.