[Bug c/34337] New: Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[Bug c/34337] New: Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[ismail at pardus dot org dot tr]

I got an internal error while building gtkwhiteboard.c from pidgin 2.3.0 [0] .

[0] http://downloads.sourceforge.net/pidgin/pidgin-2.3.0.tar.bz2


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           Summary: Internal error while building gtkwhiteboardc.c from
                    pidgin 2.3.0
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ismail at pardus dot org dot tr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug c/34337] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[ismail at pardus dot org dot tr]

------- Comment #1 from ismail at pardus dot org dot tr  2007-12-04 19:18 -------
Created an attachment (id=14699)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14699&action=view)
Preprocessed source file


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[ismail at pardus dot org dot tr]

------- Comment #3 from ismail at pardus dot org dot tr  2007-12-04 19:29 -------
gcc -v shows:

Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --prefix=/usr
--bindir=/usr/i686-pc-linux-gnu/gcc/4.3.0
--includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include
--datadir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0
--mandir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/man
--infodir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include/g++-v3
--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-libgcj
--disable-libssp --disable-multilib --disable-nls --disable-werror
--disable-checking --enable-clocale=gnu --enable-__cxa_atexit
--enable-languages=c,c++,fortran,objc,obj-c++,treelang
--enable-libstdcxx-allocator=new --enable-shared --enable-ssp
--enable-threads=posix --enable-version-specific-runtime-libs
--without-included-gettext --without-system-libunwind --with-system-zlib
--with-pkgversion='Pardus Linux' --with-bugurl=http://bugs.pardus.org.tr
Thread model: posix
gcc version 4.3.0 20071204 SVN-r130598 (Pardus Linux)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[ismail at pardus dot org dot tr]

------- Comment #2 from ismail at pardus dot org dot tr  2007-12-04 19:29 -------
Forget to add used options :

-g -march=i686 -mtune=native -O2 

is used.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2007-12-04 20:29 -------
We endlessly recurse folding

Breakpoint 3, fold_binary (code=BIT_IOR_EXPR, type=0xb7c9a2d8, op0=0xb700a2ac, 
    op1=0xb7d142f4) at /home/richard/src/trunk/gcc/fold-const.c:9397
9397      enum tree_code_class kind = TREE_CODE_CLASS (code);
color_rgb << 8 & 65535
255

very likely caused by 

2007-12-03  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/29749
        * fold-const.c (fold_binary) <case BIT_AND_EXPR>: Optimize
        (X << C1) & C2 into (X << C1) & (C2 | ((1 << C1) - 1))
        and (X >> C1) & C2 into (X >> C1) & (C2 | ~((type) -1 >> C1)).
        (fold_binary) <case LSHIFT_EXPR, case RSHIFT_EXPR>: Optimize
        (X & C2) << C1 into (X << C1) & (C2 << C1) and
        (X & C2) >> C1 into (X >> C1) & (C2 >> C1) if that allows further
        optimizations.


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu dot org
OtherBugsDependingO|                            |29749
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
            Summary|Internal error while        |[4.3 Regression] Internal
                   |building gtkwhiteboardc.c   |error while building
                   |from pidgin 2.3.0           |gtkwhiteboardc.c from pidgin
                   |                            |2.3.0
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[jakub at gcc dot gnu dot org]

-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-12-04 20:32:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2007-12-04 20:33 -------
Testcase:

int foo(int color_rgb)
{
  return ((color_rgb << 8) & 65535) | 255;
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2007-12-04 20:50 -------
It is the:
          /* Minimize the number of bits set in C1, i.e. C1 := C1 & ~C2.  */
          hi1 &= mhi;
          lo1 &= mlo;
          if ((hi1 & ~hi2) != hi1 || (lo1 & ~lo2) != lo1)
            return fold_build2 (BIT_IOR_EXPR, type,
                                fold_build2 (BIT_AND_EXPR, type,
                                             TREE_OPERAND (arg0, 0), 
                                             build_int_cst_wide (type,
                                                                 lo1 & ~lo2,
                                                                 hi1 & ~hi2)),
                                arg1);
optimization that fights against the new optimization.  Guess a simple check
if fold_build2 of the BIT_AND_EXPR has created again a BIT_AND_EXPR with the
same first argument and second argument became the original constant should
cure it, will test tomorrow.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[ismail at pardus dot org dot tr]

------- Comment #7 from ismail at pardus dot org dot tr  2007-12-05 07:24 -------
Just a note, this seems to break kernel-2.6.24 compilation too, out of memory
and cc1 gets killed.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[laurent at guerby dot net]

------- Comment #8 from laurent at guerby dot net  2007-12-05 20:03 -------
Yep, blows up at more than 5.6GB of RAM on drivers/ata/sata_promise.c (on the
compile farm).


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[jakub at gcc dot gnu dot org]

------- Comment #9 from jakub at gcc dot gnu dot org  2007-12-05 22:24 -------
Subject: Bug 34337

Author: jakub
Date: Wed Dec  5 22:24:08 2007
New Revision: 130635

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130635
Log:
        PR middle-end/34337
        * fold-const.c (fold_binary) <case BIT_IOR_EXPR>: Don't minimize
        number of bits set in C1 if a mode mask for some mode can be used
        instead.

        * gcc.c-torture/execute/20071205-1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/20071205-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[jakub at gcc dot gnu dot org]

------- Comment #10 from jakub at gcc dot gnu dot org  2007-12-05 22:25 -------
Fixed.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337

[Bug middle-end/34337] [4.3 Regression] Internal error while building gtkwhiteboardc.c from pidgin 2.3.0

[jakub at gcc dot gnu dot org]

------- Comment #11 from jakub at gcc dot gnu dot org  2007-12-05 22:25 -------
Fixed.


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jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34337