[Bug c/48731] New: regression: __attribute__((flatten)) produces error with function calling variadic functions

[Bug c/48731] New: regression: __attribute__((flatten)) produces error with function calling variadic functions

[florent.bruneau_gcc at m4x dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48731

           Summary: regression: __attribute__((flatten)) produces error
                    with function calling variadic functions
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: florent.bruneau_gcc@m4x.org


Created attachment 24075
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24075
preprocessed example source

Function with the flatten attribute that call variadic function do not compile
anymore with gcc-4.6. It worked perfectly with gcc-4.5. The attachment provide
a simple example of code.

Compilation flag:
% gcc-4.6 -std=gnu99 --save-temp -O3 -c flatten_variadic.c

Resulting error:
flatten_variadic.c: In function ‘blah2’:
flatten_variadic.c:5:23: error: ‘va_start’ used in function with fixed args

GCC: gcc-4.6 (Debian 4.6.0-4) 4.6.1 20110419 (prerelease)
System: Debian: Linux edelzwicker 2.6.38-2-amd64 #1 SMP Thu Apr 7 04:28:07 UTC
2011 x86_64 GNU/Linux

[Bug c/48731] regression: __attribute__((flatten)) produces error with function calling variadic functions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48731

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.04.23 09:13:41
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-23 09:13:41 UTC ---
I will have a look.

[Bug c/48731] regression: __attribute__((flatten)) produces error with function calling variadic functions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48731

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-26 12:59:33 UTC ---
Author: rguenth
Date: Tue Apr 26 12:59:22 2011
New Revision: 172963

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172963
Log:
2011-04-26  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/48731
    * ipa-inline.c (cgraph_flatten): Test if function is inlinable.

    * gcc.dg/torture/pr48731.c: New testcase.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/torture/pr48731.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/ipa-inline.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog

[Bug c/48731] regression: __attribute__((flatten)) produces error with function calling variadic functions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48731

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-26 13:00:58 UTC ---
Author: rguenth
Date: Tue Apr 26 13:00:53 2011
New Revision: 172964

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=172964
Log:
2011-04-26  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/48731
    * gcc.dg/torture/pr48731.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr48731.c
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug c/48731] regression: __attribute__((flatten)) produces error with function calling variadic functions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48731

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.6.1

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-26 13:01:55 UTC ---
Fixed.