optimization bug

[Dima Volodin]

The same thing w/o -O works OK. This one was tested on Solaris x86 and
Solaris Sparc. The results are absolutely the same.


Cheers

Dima



==== 00.cc ====
#include <iostream.h>

class L
{
public:
        virtual int operator () () = 0;
};

void
p (L& f)
{
        class LL : public L
        {
        public:
                int x;

                int internal ()
                {
                        return ++x;
                }

                int operator () ()
                {
                        return internal ();
                }

        } l;

        l.x = 0;

        if (&f == 0) p (l);
        else         cout << f();

        cout << l.x;
}

int
main ()
{
        p (*(L*)0);

        cout << endl;
}


==== g++ -v -O 00.cc ====
Reading specs from
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/specs
gcc version egcs-2.91.57 19980901 (egcs-1.1 release)
 /usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/cpp -lang-c++ -v
-undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=91
-Dunix -D__svr4__ -D__SVR4 -Dsun -D__unix__ -D__svr4__ -D__SVR4
-D__sun__ -D__unix -D__sun -Asystem(svr4) -D__EXCEPTIONS -D__OPTIMIZE__
-Asystem(unix) -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__
-Di586 -Dpentium -D__i586 -D__i586__ -D__pentium -D__pentium__ 00.cc
/var/tmp/cc7Z02yJ.ii
GNU CPP version egcs-2.91.57 19980901 (egcs-1.1 release) (i386 System V
Release 4)
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/g++
 /usr/local/include
 /usr/local/i586--solaris2.6/include
 /usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/include
 /usr/include
End of search list.
 /usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/cc1plus
/var/tmp/cc7Z02yJ.ii -quiet -dumpbase 00.cc -O -version -o
/var/tmp/cckAVDWE.s
GNU C++ version egcs-2.91.57 19980901 (egcs-1.1 release)
(i586--solaris2.6) compiled by GNU C version 2.8.1.
 /usr/local/i586--solaris2.6/bin/as -V -Qy -o /var/tmp/ccYAxHz5.o
/var/tmp/cckAVDWE.s
GNU assembler version 2.8.1 (i586--solaris2.6), using BFD version 2.8.1
 /usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/collect2 -V -Y
P,/usr/ccs/lib:/usr/lib -Qy
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/crt1.o
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/crti.o
/usr/ccs/lib/values-Xa.o
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/crtbegin.o
-L/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57
-L/usr/local/i586--solaris2.6/lib -L/usr/ccs/bin -L/usr/ccs/lib
-L/usr/local/lib /var/tmp/ccYAxHz5.o -lstdc++ -lm -lgcc -lc -lgcc
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/crtend.o
/usr/local/lib/gcc-lib/i586--solaris2.6/egcs-2.91.57/crtn.o
ld: Software Generation Utilities - Solaris/ELF (3.0)
Undefined                       first referenced
 symbol                             in file
__cl__Q29p__FR1L.0_2LL.283          /var/tmp/ccYAxHz5.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status