[Bug c/53420] New: [4.8 Regression] ICE in iterative_hash_expr, at tree.c:7039

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53420

             Bug #: 53420
           Summary: [4.8 Regression] ICE in iterative_hash_expr,  at
                    tree.c:7039
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: dang...@gcc.gnu.org
              Host: hppa2.0w-hp-hpux11.00
            Target: hppa2.0w-hp-hpux11.00
             Build: hppa2.0w-hp-hpux11.00


Created attachment 27445
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27445
Preprocessed source

Following occurs in stage2:

/xxx/gnu/gcc/objdir/./prev-gcc/xgcc -B/xxx/gnu/gcc/objdir/./prev-gcc/
-B/opt/gnu
/gcc/gcc-4.8/hppa2.0w-hp-hpux11.00/bin/
-B/opt/gnu/gcc/gcc-4.8/hppa2.0w-hp-hpux1
1.00/bin/ -B/opt/gnu/gcc/gcc-4.8/hppa2.0w-hp-hpux11.00/lib/ -isystem
/opt/gnu/gc
c/gcc-4.8/hppa2.0w-hp-hpux11.00/include -isystem
/opt/gnu/gcc/gcc-4.8/hppa2.0w-h
p-hpux11.00/sys-include    -c  -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND
-DIN_GCC_FRON
TEND -g -O2 -DIN_GCC   -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wstr
ict-prototypes -Wmissing-prototypes  -Wold-style-definition -Wc++-compat
-fno-co
mmon  -DHAVE_CONFIG_H -I. -Ic-family -I../../gcc/gcc -I../../gcc/gcc/c-family
-I
../../gcc/gcc/../include -I../../gcc/gcc/../libcpp/include
-I/opt/gnu/gcc/gmp/in
clude  -I../../gcc/gcc/../libdecnumber -I../../gcc/gcc/../libdecnumber/dpd
-I../
libdecnumber    ../../gcc/gcc/c-family/c-lex.c -o c-family/c-lex.o
In file included from ../../gcc/gcc/c-family/c-lex.c:23:0:
../../gcc/gcc/c-family/c-lex.c: In function 'c_lex_with_flags':
../../gcc/gcc/system.h:958:93: internal compiler error: in iterative_hash_expr, 
at tree.c:7039
 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q;
TOTY
PE _nq;})(X))._nq)

             ^
../../gcc/gcc/system.h:958:93: note: in expansion of macro 'CONST_CAST2'
 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q;
TOTY
PE _nq;})(X))._nq)

             ^
../../gcc/gcc/system.h:977:28: note: expanded from here
 #define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X))
                            ^
../../gcc/gcc/system.h:977:28: note: in expansion of macro 'CONST_CAST'
../../gcc/gcc/c-family/c-lex.c:355:12: note: expanded from here
      str = CONST_CAST (char *, TREE_STRING_POINTER (num_string));            ^

# ./xgcc -B./ -v
Reading specs from ./specs
COLLECT_GCC=./xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: hppa2.0w-hp-hpux11.00
Configured with: ../gcc/configure --with-gnu-as --with-as=/opt/gnu/bin/as
--enable-shared --with-local-prefix=/opt/gnu --prefix=/opt/gnu/gcc/gcc-4.8
--with-gmp=/opt/gnu/gcc/gmp --enable-debug=no --disable-nls
--disable-build-poststage1-with-cxx --enable-threads=posix
--enable-languages=c,c++,objc,fortran,java,ada,obj-c++
Thread model: posix
gcc version 4.8.0 20120518 (experimental) [trunk revision 187647] (GCC)