[Bug c/51527] New: ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[Bug c/51527] New: ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

             Bug #: 51527
           Summary: ICE: Segmentation fault: 'convert_to_integer' enters
                    infinite recursion
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
              Host: i686-pc-linux-gnu
            Target: avr
             Build: i686-pc-linux-gnu


== Code ==

void test_1 (void)
{
  int i;

  // notice it works with __uint24
  __int24 a, b;

  for (i = 0; i < 500; i++)
  {
      if (i & 1)
          a += 0x7654321L;
      else
          b += 0x5fe453L;
  }
}

This code enters infinite recurson.

Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/home/georg/install/gcc-4.7 --disable-nls --enable-languages=c,c++
--with-dwarf2 --enable-checking=yes,rtl

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-12-13 12:30:12 UTC ---
Created attachment 26069
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26069
Log output, FYI

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-13
                 CC|                            |eric.weddington at atmel
                   |                            |dot com
   Target Milestone|---                         |4.7.0
     Ever Confirmed|0                           |1

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-03-05 17:31:49 UTC ---
Here is a smaller test case:

__int24 add3 (__int24 a)
{
    return a + 0x10000;
}


It works if

-- the constant is cast with (__int24) 0x10000

-- the constant is smaller than 0x10000

-- the operation is not +, - or *

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.0                       |4.7.1

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-22 08:27:25 UTC ---
GCC 4.7.0 is being released, adjusting target milestone.

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-04-27 10:52:03 UTC ---
Author: gjl
Date: Fri Apr 27 10:51:58 2012
New Revision: 186899

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186899
Log:
    PR c/51527
    * convert.c (convert_to_integer): Avoid infinte recursion for
    target-defined built-in types.


Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/convert.c

[Bug c/51527] ICE: Segmentation fault: 'convert_to_integer' enters infinite recursion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51527

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to work|                            |4.8.0
         Resolution|                            |FIXED

--- Comment #5 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-04-27 11:03:48 UTC ---
Fixed in 4.7.1