home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: gnu.g++.bug
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!miro.COM!anton
- From: anton@miro.COM (Jeff Anton)
- Subject: g++ 2.3.1 optimization bug
- Message-ID: <9211201859.AA02492@grail.miro.com>
- Sender: gnulists@ai.mit.edu
- Organization: Gnus Not Usenet
- Distribution: gnu
- Date: Fri, 20 Nov 1992 18:59:06 GMT
- Approved: bug-g++@prep.ai.mit.edu
- Lines: 84
-
- Here is a simple little program and problem. When compiled with
- optimization, the hex manipulator has no effect.
- Jeff Anton
- anton@miro.com
- -----------
-
- #include <iostream.h>
-
- void
- foo(ostream *o) {
- *o << o->flags() << endl;
- *o << hex << o->flags() << endl;
- *o << dec << o->flags() << endl;
- }
-
- void
- bar(ostream &o) {
- o << o.flags() << endl;
- o << hex << o.flags() << endl;
- o << dec << o.flags() << endl;
- }
-
- int
- main(void)
- {
- cout << cout.flags() << endl;
- cout << hex << cout.flags() << endl;
- cout << dec << cout.flags() << endl;
-
- foo(&cout);
- bar(cout);
-
- cout << cout.flags() << endl;
- cout << hex << cout.flags() << endl;
- cout << dec << cout.flags() << endl;
- }
-
-
-
- grail:anton[364]: g++ -v test.cc
- Reading specs from /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/specs
- gcc version 2.3.1
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun -D__unix test.cc /usr/tmp/cca02430.i
- GNU CPP version 2.3.1 (sparc)
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/cc1plus /usr/tmp/cca02430.i -quiet -dumpbase test.cc -version -o /usr/tmp/cca02430.s
- GNU C++ version 2.3.1 (sparc) compiled by GNU C version 2.3.1.
- as -o /usr/tmp/cca024301.o /usr/tmp/cca02430.s
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/ld -e start -dc -dp /lib/crt0.o -L/usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1 -L/usr/local/lib /usr/tmp/cca024301.o -lg++ -lgcc -lc -lgcc
- grail:anton[365]: a.out
- 536870918
- 20000006
- 536870918
- 84896
- 14ba0
- 84896
- 84896
- 14ba0
- 84896
- 536870918
- 20000006
- 536870918
- grail:anton[366]: g++ -O2 -v test.cc
- Reading specs from /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/specs
- gcc version 2.3.1
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun -D__unix -D__OPTIMIZE__ test.cc /usr/tmp/cca02453.i
- GNU CPP version 2.3.1 (sparc)
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/cc1plus /usr/tmp/cca02453.i -quiet -dumpbase test.cc -O2 -version -o /usr/tmp/cca02453.s
- GNU C++ version 2.3.1 (sparc) compiled by GNU C version 2.3.1.
- as -o /usr/tmp/cca024531.o /usr/tmp/cca02453.s
- /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1/ld -e start -dc -dp /lib/crt0.o -L/usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.3.1 -L/usr/local/lib /usr/tmp/cca024531.o -lg++ -lgcc -lc -lgcc
- grail:anton[367]: a.out
- 536870918
- 536870918
- 536870918
- 84896
- 84928
- 84880
- 84896
- 84928
- 84880
- 536870918
- 536870918
- 536870918
-
-