[Bug c/29079] New: ICE during bootstrap when using HP-cc and -O2/-O3, works with -O0/-O1

[michael dot haubenwallner at salomon dot at]

When using HP ANSI C compiler with CFLAGS (and CXXFLAGS) set to -O2 or -O3 for
bootstrap, xgcc does ICE during first compilation of gcc/libgcov.c.

This does work when CFLAGS/CXXFLAGS unset, or set to -O0 or -O1 (thus severity
minor).

Works for gcc-3.4.5.

Errormessage is:
./xgcc -B./ -B/usr/local/ia64-hp-hpux11.23/bin/ -isystem
/usr/local/ia64-hp-hpux11.23/include -isystem
/usr/local/ia64-hp-hpux11.23/sys-include
-L/wamas/local/haubi/src/gcc-build-cc-O2-gas/gcc/../ld -O2  -O2 -O2   -DIN_GCC 
  -DUSE_LIBUNWIND_EXCEPTIONS -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include   -g 
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -I. -I. -I/tools/haubi/src/gcc-4.1.1/gcc
-I/tools/haubi/src/gcc-4.1.1/gcc/. -I/tools/haubi/src/gcc-4.1.1/gcc/../include
-I./../intl -I/tools/haubi/src/gcc-4.1.1/gcc/../libcpp/include  
-DL_gcov_merge_single -c /tools/haubi/src/gcc-4.1.1/gcc/libgcov.c -o
libgcc/./_gcov_merge_single.o
/tools/haubi/src/gcc-4.1.1/gcc/libgcov.c: In function '__gcov_merge_single':
/tools/haubi/src/gcc-4.1.1/gcc/libgcov.c:629: internal compiler error: in ?, at
expmed.c:2959
Please submit a full bug report,
<snip>

Configure-line was:
/tools/haubi/src/gcc-4.1.1/configure --with-gnu-as --with-as=/usr/local/bin/as
--without-gnu-ld --with-ld=/usr/ccs/bin/ld

$ cc -V
cc: HP aC++/ANSI C B3910B A.06.00 [Aug 25 2004]

$ /usr/local/bin/as --version
GNU assembler 2.15
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `ia64-hp-hpux11.23'.

Attachments (logfiles) follow.


-- 
           Summary: ICE during bootstrap when using HP-cc and -O2/-O3, works
                    with -O0/-O1
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: michael dot haubenwallner at salomon dot at
 GCC build triplet: ia64-hp-hpux11.23
  GCC host triplet: ia64-hp-hpux11.23
GCC target triplet: ia64-hp-hpux11.23


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29079