[Bug tree-optimization/58570] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

2013-10-07 Thread ebotcazou at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58570

Eric Botcazou ebotcazou at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2013-10-07
 Ever confirmed|0   |1

--- Comment #4 from Eric Botcazou ebotcazou at gcc dot gnu.org ---
Ouch.  The tree-ssa-alias.c changes were not intended to affect alias.c, but
they of course do nowadays...

[Bug tree-optimization/58570] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

2013-10-06 Thread bernd.edlinger at hotmail dot de 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58570

Bernd Edlinger bernd.edlinger at hotmail dot de changed:

   What|Removed |Added

 CC||bernd.edlinger at hotmail dot 
de

--- Comment #1 from Bernd Edlinger bernd.edlinger at hotmail dot de ---
Created attachment 30961
  -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=30961action=edit
reduced test case

the code generation is not aware that d[i].f0 and d[i].f1 overlap one byte.

[Bug tree-optimization/58570] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

2013-10-06 Thread bernd.edlinger at hotmail dot de 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58570

--- Comment #2 from Bernd Edlinger bernd.edlinger at hotmail dot de ---
Created attachment 30962
  -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=30962action=edit
for a possible fix

comments?

[Bug tree-optimization/58570] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

2013-10-06 Thread mikpelinux at gmail dot com 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58570

Mikael Pettersson mikpelinux at gmail dot com changed:

   What|Removed |Added

 CC||ebotcazou at gcc dot gnu.org

--- Comment #3 from Mikael Pettersson mikpelinux at gmail dot com ---
Started with r198024.  Author CC:d.

[Bug tree-optimization/58570] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu (both 32-bit and 64-bit modes)

2013-09-30 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58570

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

   Target Milestone|--- |4.9.0
Summary|wrong code at -Os and above |[4.9 Regression] wrong code
   |on x86_64-linux-gnu (both   |at -Os and above on
   |32-bit and 64-bit modes)|x86_64-linux-gnu (both
   ||32-bit and 64-bit modes)