[Bug c/44024] New: missed optimization

[Bug c/44024] New: missed optimization

[espindola at gcc dot gnu dot org]

The commit
http://gcc.gnu.org/viewcvs?view=revision&revision=122551

changed gcc's behaviour in

-----------------------------
int bar();
int a = ((void *) bar) != 0;
--------------------------------

We used to accept it, but now we produce

test.c:2: error: initializer element is not constant

The new behaviour is actually the correct one, but it points out that the
change had unintentional effects. Richard asked me to create his bug for him to
investigate.


-- 
           Summary: missed optimization
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: rguenther at suse dot de
        ReportedBy: espindola at gcc dot gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44024

[Bug c/44024] missed optimization

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|rguenther at suse dot de    |rguenth at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-05-07 13:46:07
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44024

[Bug c/44024] missed optimization

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2010-05-09 18:17 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44024

[Bug c/44024] missed optimization

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-05-09 18:17 -------
Subject: Bug 44024

Author: rguenth
Date: Sun May  9 18:17:33 2010
New Revision: 159205

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159205
Log:
2010-05-09  Richard Guenther  <rguenther@suse.de>

        PR middle-end/44024
        * fold-const.c (tree_single_nonzero_warnv_p): Properly
        handle &FUNCTION_DECL.

        * gcc.dg/pr44024.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr44024.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44024