[Bug tree-optimization/21966] New: ICE in verify_ssa building 64-bit zlib on IRIX 6

["gcc-bugzilla at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Bootstrapping current mainline on IRIX 6.5 with --enable-libgcj fails building the 64-bit zlib:

/.vol/gcc/obj/gcc-4.1.0-20050607/6.5-gcc-java/./gcc/xgcc -B/.vol/gcc/obj/gcc-4.1.0-20050607/6.5-gcc-java/./gcc/ -B/.vol/gcc/share/mips-sgi-irix6.5/bin/ -B/.vol/gcc/share/mips-sgi-irix6.5/lib/ -isystem /.vol/gcc/share/mips-sgi-irix6.5/include -isystem /.vol/gcc/share/mips-sgi-irix6.5/sys-include -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"zlib\" -DVERSION=\"1.1.4\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1 -DHAVE_STDLIB_H=1 -DHAVE_UNISTD_H=1 -DHAVE_GETPAGESIZE=1 -DHAVE_MMAP=1 -DHAVE_MEMCPY=1 -DHAVE_STRERROR=1 -DHAVE_UNISTD_H=1 -I. -I/.vol/gcc/src/gcc-dist/zlib -O2 -g -O2 -mabi=64 -c /.vol/gcc/src/gcc-dist/zlib/inffast.c   -DPIC -o .libs/inffast.o
/.vol/gcc/src/gcc-dist/zlib/inffast.c: In function 'inflate_fast':
/.vol/gcc/src/gcc-dist/zlib/inffast.c:70: error: Definition in block 49 does not dominate use in block 47
for SSA_NAME: D.2252_580 in statement:
D.2256_585 = D.2252_580 /[fl] 3;
/.vol/gcc/src/gcc-dist/zlib/inffast.c:70: internal compiler error: verify_ssa failed.
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[4]: *** [inffast.lo] Error 1

Environment:
System: IRIX64 columba 6.5 10120104 IP27


	
host: mips-sgi-irix6.5
build: mips-sgi-irix6.5
target: mips-sgi-irix6.5
configured with: /.vol/gcc/src/gcc-dist/configure --prefix=/.vol/gcc --with-local-prefix=/.vol/gcc --disable-nls --with-gnu-as --with-as=/homes/ro/bin/gas-2.15 --enable-libgcj --with-gmp-dir=/.vol/gcc/obj/gmp-4.1.3 --with-mpfr-dir=/.vol/gcc/obj/gmp-4.1.3/mpfr --disable-libmudflap

How-To-Repeat:
Bootstrap mainline as described above.
------- Additional Comments From ro at techfak dot uni-bielefeld dot de  2005-06-08 18:38 -------
Fix:
The problem vanishes with -O0.

-- 
           Summary: ICE in verify_ssa building 64-bit zlib on IRIX 6
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ro at techfak dot uni-bielefeld dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: mips-sgi-irix6.5
  GCC host triplet: mips-sgi-irix6.5
GCC target triplet: mips-sgi-irix6.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21966