[Bug c++/51565] New: fastcall in array of method pointers: internal compiler error

[Bug c++/51565] New: fastcall in array of method pointers: internal compiler error

[arr at kent dot ac.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

             Bug #: 51565
           Summary: fastcall in array of method pointers: internal
                    compiler error
    Classification: Unclassified
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: arr@kent.ac.uk


Created attachment 26099
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26099
Preprocessed source (15 lines)

The attached program (presumably illegal) attempts to insert a pointer to a
class member function into an array of such pointers.  However, the inserted
function has the fastcall attribute: this causes an internal compiler error:

> gcc -v --save-temps -c -Wall bug.cpp
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i586-suse-linux/4.5/lto-wrapper
Target: i586-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib --libexecdir=/usr/lib
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada
--enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.5
--enable-ssp --disable-libssp --disable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--disable-libgcj --disable-libmudflap --with-slibdir=/lib --with-system-zlib
--enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --program-suffix=-4.5
--enable-linux-futex --without-system-libunwind --enable-gold
--with-plugin-ld=/usr/bin/gold --with-arch-32=i586 --with-tune=generic
--build=i586-suse-linux
Thread model: posix
gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-Wall' '-mtune=generic'
'-march=i586'
 /usr/lib/gcc/i586-suse-linux/4.5/cc1plus -E -quiet -v -D_GNU_SOURCE bug.cpp
-mtune=generic -march=i586 -Wall -fpch-preprocess -o bug.ii
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.5
 /usr/include/c++/4.5/i586-suse-linux
 /usr/include/c++/4.5/backward
 /usr/local/include
 /usr/lib/gcc/i586-suse-linux/4.5/include
 /usr/lib/gcc/i586-suse-linux/4.5/include-fixed
 /usr/lib/gcc/i586-suse-linux/4.5/../../../../i586-suse-linux/include
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-Wall' '-mtune=generic'
'-march=i586'
 /usr/lib/gcc/i586-suse-linux/4.5/cc1plus -fpreprocessed bug.ii -quiet
-dumpbase bug.cpp -mtune=generic -march=i586 -auxbase bug -Wall -version -o
bug.s
GNU C++ (SUSE Linux) version 4.5.1 20101208 [gcc-4_5-branch revision 167585]
(i586-suse-linux)
        compiled by GNU C version 4.5.1 20101208 [gcc-4_5-branch revision
167585], GMP version 5.0.1, MPFR version 3.0.0-p3, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=125809
GNU C++ (SUSE Linux) version 4.5.1 20101208 [gcc-4_5-branch revision 167585]
(i586-suse-linux)
        compiled by GNU C version 4.5.1 20101208 [gcc-4_5-branch revision
167585], GMP version 5.0.1, MPFR version 3.0.0-p3, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=97 --param ggc-min-heapsize=125809
Compiler executable checksum: 3bd6bad154f92415c6ab6c213479edc0
bug.cpp: In function ‘int main()’:
bug.cpp:9:25: internal compiler error: in process_init_constructor_array, at
cp/typeck2.c:1039
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.

[Bug target/51565] [4.4/4.5/4.6/4.7 Regression] fastcall in array of method pointers: internal compiler error

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-29
          Component|c++                         |target
      Known to work|                            |4.3.5
   Target Milestone|---                         |4.4.7
            Summary|fastcall in array of method |[4.4/4.5/4.6/4.7
                   |pointers: internal compiler |Regression] fastcall in
                   |error                       |array of method pointers:
                   |                            |internal compiler error
     Ever Confirmed|0                           |1
      Known to fail|                            |4.4.5, 4.7.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-12-29 06:00:53 UTC ---
Confirmed.

[Bug c++/51565] [4.4/4.5/4.6/4.7 Regression] fastcall in array of method pointers: internal compiler error

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |i?86-*-*
           Priority|P3                          |P2
          Component|target                      |c++

[Bug c++/51565] [4.4/4.5/4.6/4.7 Regression] fastcall in array of method pointers: internal compiler error

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |jason at gcc dot gnu.org
         AssignedTo|unassigned at gcc dot       |jason at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2012-01-11 20:51:01 UTC ---
4.3 generated wrong code for this testcase, which you can see by extending it a
bit:

extern "C" void abort();

int i;

struct Foo {
    __attribute__((fastcall))
    void fee(int j) { i = j; }
};

int main()
{
    typedef void (Foo::*FP)(int);
    FP fp[] = {&Foo::fee};
    (Foo().*(fp[0]))(42);
    if (i != 42)
      abort();
}

This is true back to version 3.4.  Before that, we just ignored the attribute.

[Bug c++/51565] [4.4/4.5/4.6/4.7 Regression] fastcall in array of method pointers: internal compiler error

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2012-01-12 02:30:53 UTC ---
Author: jason
Date: Thu Jan 12 02:30:47 2012
New Revision: 183120

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183120
Log:
    PR c++/51565
    * call.c (standard_conversion): For ptrmemfuncs, compare the
    static_fn_types.

Added:
    trunk/gcc/testsuite/g++.dg/ext/attrib42.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/51565] [4.4/4.5/4.6/4.7 Regression] fastcall in array of method pointers: internal compiler error

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51565

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.4.7                       |4.7.0

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2012-01-12 02:33:03 UTC ---
Fixed for 4.7.  Not backporting invalid code patches.