[Bug middle-end/58941] [4.7/4.8/4.9 Regression] MIPS: value modification on zero-length array optimized away

2013-11-05 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58941

--- Comment #2 from Richard Biener  ---
Author: rguenth
Date: Tue Nov  5 13:24:13 2013
New Revision: 204391

URL: http://gcc.gnu.org/viewcvs?rev=204391&root=gcc&view=rev
Log:
2013-11-05  Richard Biener  

PR middle-end/58941
* tree-dfa.c (get_ref_base_and_extent): Merge common code
in MEM_REF and TARGET_MEM_REF handling.  Make sure to
process trailing array detection before diving into the
view-converted object (and possibly apply some extra offset).

* gcc.dg/torture/pr58941.c: New testcase.

Added:
trunk/gcc/testsuite/gcc.dg/torture/pr58941.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-dfa.c

[Bug middle-end/58941] [4.7/4.8/4.9 Regression] MIPS: value modification on zero-length array optimized away

2013-11-04 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58941

Richard Biener  changed:

   What|Removed |Added

 Status|UNCONFIRMED |ASSIGNED
  Known to work||4.3.4
   Keywords||alias, wrong-code
   Last reconfirmed||2013-11-04
  Component|c   |middle-end
   Assignee|unassigned at gcc dot gnu.org  |rguenth at gcc dot 
gnu.org
 Ever confirmed|0   |1
Summary|MIPS: value modification on |[4.7/4.8/4.9 Regression]
   |zero-length array optimized |MIPS: value modification on
   |away|zero-length array optimized
   ||away
   Target Milestone|--- |4.7.4

--- Comment #1 from Richard Biener  ---
Confirmed, mine.