[Bug target/66648] [4.9/5/6 regression] incorrect memcpy expansion with unrolled_loop strategy at -O2

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66648

--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Sat Jul 25 09:19:24 2015
New Revision: 226212

URL: https://gcc.gnu.org/viewcvs?rev=226212&root=gcc&view=rev
Log:
        PR target/66648
        * config/i386/i386.c (ix86_expand_set_or_movmem): Emit main loop
        execution guard when min_size is less than size_needed.

testsuite/ChangeLog:

        PR target/66648
        * gcc.target/i386/pr66648.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/pr66648.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog