[Bug middle-end/56888] memcpy implementation optimized as a call to memcpy

fd935653 at opayq dot com gcc-bugzilla@gcc.gnu.org
Mon Nov 3 07:09:00 GMT 2014


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56888

Evan Langlois <fd935653 at opayq dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |fd935653 at opayq dot com

--- Comment #34 from Evan Langlois <fd935653 at opayq dot com> ---
Grub-2.00 (grub-mkimage utility) will crash with -O3 because of this bug, using
gcc 4.8.2.  GDB shows it going into an infinite loop calling memset() until it
segfaults.  I added the -fno-tree-loop-distribute-patterns and it created code
that doesn't barf on itself.

This is definately a bug and a pretty serious one.



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