[Bug target/79449] ppc builtin expansion of strncmp can cross page (4k) boundary where it should not

[acsawdey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79449

--- Comment #1 from acsawdey at gcc dot gnu.org ---
Author: acsawdey
Date: Mon Feb 13 16:00:22 2017
New Revision: 245392

URL: https://gcc.gnu.org/viewcvs?rev=245392&root=gcc&view=rev
Log:
2017-02-13  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        PR target/79449
        * gcc.dg/strncmp-2.c: New.  Test strncmp and memcmp builtin expansion
        for reading beyond a 4k boundary.

2017-02-13  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

        PR target/79449
        * config/rs6000/rs6000.c (expand_block_compare): Make sure runtime
        boundary crossing check and subsequent code generation agree.



Added:
    trunk/gcc/testsuite/gcc.dg/strncmp-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/testsuite/ChangeLog