[Bug c++/28780] New: internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[Bug c++/28780] New: internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[bero at arklinux dot org]

This happens while compiling Qt 3.3.6 with current gcc trunk:

g++ -c -o qstring.o -I/usr/include/fontconfig -I/usr/include/X11/Xft -O2
-march=i586 -mtune=i686 -fomit-frame-pointer -fweb -frename-registers
-fvisibility-inlines-hidden -fvisibility=hidden -fno-use-cxa-atexit
-fno-exceptions -I. -Igenerators -Igenerators/unix -Igenerators/win32
-Igenerators/mac -I/usr/src/ark/BUILD/qt-copy/include/qmake
-I/usr/src/ark/BUILD/qt-copy/include -I/usr/src/ark/BUILD/qt-copy/include
-DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL
-DQT_NO_COMPRESS -I/usr/src/ark/BUILD/qt-copy/mkspecs/linux-g++
-DHAVE_QCONFIG_CPP /usr/src/ark/BUILD/qt-copy/src/tools/qstring.cpp
/usr/src/ark/BUILD/qt-copy/src/tools/qstring.cpp: In member function 'bool
QString::endsWith(const QString&, bool) const':
/usr/src/ark/BUILD/qt-copy/src/tools/qstring.cpp:7003: internal compiler error:
in build_polynomial_chrec, at tree-chrec.h:108
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: internal compiler error: in build_polynomial_chrec, at
                    tree-chrec.h:108
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bero at arklinux dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug c++/28780] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[bero at arklinux dot org]

------- Comment #1 from bero at arklinux dot org  2006-08-19 12:57 -------
Tried on both x86 and x86_64


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug c++/28780] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[bero at arklinux dot org]

------- Comment #2 from bero at arklinux dot org  2006-08-19 13:07 -------
The problem goes away with -O0, and keeps working with
-fdefer-pop -fdelayed-branch -fguess-branch-probability -fcprop-registers
-floop-optimize -fif-conversion -fif-conversion2 -ftree-ccp 
-ftree-dce -ftree-dominator-opts -ftree-dse -ftree-ter -ftree-lrs -ftree-sra
-ftree-copyrename -ftree-fre -ftree-ch -fmerge-constants

(which, according to the manpage, should be equivalent to -O1, but -O1 breaks)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug c++/28780] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[bero at arklinux dot org]

------- Comment #3 from bero at arklinux dot org  2006-08-19 13:09 -------
Created an attachment (id=12096)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12096&action=view)
Preprocessed source


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug c++/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[bero at arklinux dot org]

------- Comment #4 from bero at arklinux dot org  2006-08-19 13:56 -------
Created an attachment (id=12097)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12097&action=view)
Preprocessed source from ffmpeg

The same error shows up when compiling ffmpeg


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-08-19 15:18 -------
> (which, according to the manpage, should be equivalent to -O1, but -O1 breaks)
No re-read the man page, -O1 enables more.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |blocker
          Component|c++                         |tree-optimization
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-08-19 15:23 -------
These all look related to PR 28776.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |28776


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[tbm at cyrius dot com]

------- Comment #7 from tbm at cyrius dot com  2006-08-19 18:54 -------
typedef unsigned char uchar;
typedef unsigned short ushort;
typedef unsigned uint;
const bool FALSE = 0;
struct __attribute__ ((visibility ("default"))) QShared
{
};
class __attribute__ ((visibility ("default"))) QChar
{
public:QChar ();
  QChar (const QChar & c);
  uchar row () const
  {
    return ((uchar) (ucs >> 8) & 0xff);
  }
private:  ushort ucs;
}
;
inline
QChar::QChar (const QChar & c):
ucs (c.ucs)
{
}
inline bool
operator!= (QChar c1, QChar c2)
{
}
struct __attribute__ ((visibility ("default"))) QStringData:public QShared
{
  QChar *unicode;
};
class __attribute__ ((visibility ("default"))) QString
{
  bool isNull () const;
  uint length () const;
  const QChar *unicode () const
  {
    return d->unicode;
  }
  bool endsWith (const QString & str, bool cs) const;
  QStringData *d;
};
inline bool
QString::isNull () const
{
  return unicode () == 0;
}
inline uint
QString::length () const
{
}
inline QChar
lower (const QChar & c)
{
  if (c.row ())
    return c;
}
bool
QString::endsWith (const QString & s, bool cs) const
{
  if (isNull ())
    return s.isNull ();
  int pos = length () - s.length ();
    {
      for (int i = 0; i < (int) s.length (); i++)
        {
          if (::lower (d->unicode[pos + i]) !=::lower (s.d->unicode[i]))
            return FALSE;
        }
    }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[tbm at gcc dot gnu dot org]

-- 

tbm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-08-19 18:56:16
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2006-08-20 01:40 -------
Here is an even shorter testcase for qstring.ii:
struct  QChar
{
    QChar( const QChar& c );
    unsigned short ucs;
};
inline QChar::QChar( const QChar& c ) : ucs( c.ucs ){}
inline bool operator!=( QChar c1, QChar c2 )
{
    return c1.ucs != c2.ucs;
}
struct  QStringData  {  QChar *unicode; };
struct QString
{
    bool isNull() const;
    unsigned length() const;
    const QChar* unicode() const { return d->unicode; }
    bool endsWith( const QString& str, bool cs ) const;
    QStringData *d;
};
inline bool QString::isNull() const{ return unicode() == 0; }
inline unsigned QString::length() const{}
bool QString::endsWith( const QString& s, bool cs ) const
{
  if ( isNull() )
    return s.isNull();
 int pos = length();
 for ( int i = 0; i < (int) s.length(); i++ ) 
  if ( (d->unicode[pos + i]) != (s.d->unicode[i]) )
    return 0;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780

[Bug tree-optimization/28780] [4.2 regression] internal compiler error: in build_polynomial_chrec, at tree-chrec.h:108

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2006-08-20 05:12 -------
And here is the testcase for ffv1.i:
typedef struct RangeCoder
{
    unsigned char one_state[256];
} RangeCoder;
static inline void put_rac(RangeCoder *c, unsigned char* const state)
{
  *state= c->one_state[*state];
}
typedef struct PlaneContext{
    unsigned (*state)[32];
} PlaneContext;
static inline void put_symbol(RangeCoder *c, unsigned char *state)
{
    int i;
    const int e;
    put_rac(c, state);
    for(i=e-1; i>=0; i--)
      put_rac(c, state+22+i);
}
int encode_line(void)
{
    PlaneContext * const p;
    RangeCoder * const c;
    int a;
    put_symbol(c, p->state[a]);
}

---------------
Both of these testcases are due to pointers to different "RECORD_TYPE" but of
the same type (the MAIN_VARIANTS are the same), which is the same problem as PR
28776.

*** This bug has been marked as a duplicate of 28776 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28780