[Bug tree-optimization/49963] New: ICE: in abs_hwi, at hwint.c:108

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49963

           Summary: ICE: in abs_hwi, at hwint.c:108
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
              Host: x86-linux-gnu
            Target: avr
             Build: x86-linux-gnu


Observed this ICE in the test suite for 4.7 trunk r177267 after upgrading from
177070:

gcc.c-torture/execute/divconst-2.c: In function 'std_eqn':

gcc.c-torture/execute/divconst-2.c:20:3: internal compiler error: in abs_hwi,
at hwint.c:108


FAIL: gcc.c-torture/execute/divconst-2.c compilation,  -O0  (internal compiler
error)
FAIL: gcc.c-torture/execute/divconst-2.c compilation,  -O1  (internal compiler
error)
FAIL: gcc.c-torture/execute/divconst-2.c compilation,  -O2  (internal compiler
error)
...

== configure ========================================================

Target: avr
Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/local/gnu/install/gcc-4.7 --disable-nls --disable-shared
--enable-languages=c,c++ --with-dwarf2 --disable-lto
Thread model: single
gcc version 4.7.0 20110803 (experimental) (GCC)
GNU C (GCC) version 4.7.0 20110803 (experimental) (avr)
        compiled by GNU C version 4.3.2 [gcc-4_3-branch revision 141291], GMP
version 5.0.1, MPFR version 3.0.0-p8, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096

== hwint.c:abs_hwi() ================================================

hwint.c:abs_hwi() reads

/* Compute the absolute value of X.  */

HOST_WIDE_INT
abs_hwi (HOST_WIDE_INT x)
{
  gcc_checking_assert (x != HOST_WIDE_INT_MIN);
  return x >= 0 ? x : -x;
}

== Backtrace =========================================================


#0  fancy_abort (file=0x8890660 "../../../gcc.gnu.org/trunk/gcc/hwint.c",
line=108, function=0x889069b "abs_hwi") at
../../../gcc.gnu.org/trunk/gcc/diagnostic.c:893
#1  0x08395087 in abs_hwi (x=-2147483648) at
../../../gcc.gnu.org/trunk/gcc/hwint.c:108
#2  0x08306e8a in fold_plusminus_mult_expr (loc=2983, code=PLUS_EXPR,
type=0xb7d5d420, arg0=0xb7dcdcb0, arg1=0xb7dce24c) at
../../../gcc.gnu.org/trunk/gcc/fold-const.c:7040
#3  0x082bbef6 in fold_binary_loc (loc=2983, code=PLUS_EXPR, type=0xb7d5d420,
op0=0xb7dcdcb0, op1=0xb7dce24c) at
../../../gcc.gnu.org/trunk/gcc/fold-const.c:9685
#4  0x083174d5 in fold (expr=0xb7dcdccc) at
../../../gcc.gnu.org/trunk/gcc/fold-const.c:13666
#5  0x0813c46c in c_fully_fold_internal (expr=0xb7dcdccc, in_init=0 '\0',
maybe_const_operands=0xbfffdf4b "\001\030", maybe_const_itself=0xbfffde6a
"\001\001ÃÃÃÂ ÃÃÂ") at ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c:1238
#6  0x0813d19b in c_fully_fold (expr=0xb7dcdccc, in_init=212 'Ã',
maybe_const=0xbfffdf4b "\001\030") at
../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c:1029
#7  0x080eadcb in build_binary_op (location=2989, code=EQ_EXPR,
orig_op0=0xb7dcdccc, orig_op1=0xb7dce150, convert_p=1) at
../../../gcc.gnu.org/trunk/gcc/c-typeck.c:10172
#8  0x080ef279 in parser_build_binary_op (location=2989, code=EQ_EXPR,
arg1={value = 0xb7dcdccc, original_code = PLUS_EXPR, original_type = 0x0},
arg2={value = 0xb7dce150, original_code = ERROR_MARK, original_type =
0xb7d5d420}) at ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:3218
#9  0x080fbe57 in c_parser_binary_expression (parser=0xb7dcda9c, after=<value
optimized out>, prec=PREC_NONE) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:5663
#10 0x080fc49f in c_parser_conditional_expression (parser=0xb7dcda9c,
after=0x80000000) at ../../../gcc.gnu.org/trunk/gcc/c-parser.c:5330
#11 0x080fc9c8 in c_parser_expr_no_commas (parser=0xb7dcda9c, after=0x80000000)
at ../../../gcc.gnu.org/trunk/gcc/c-parser.c:5250
#12 0x080fce68 in c_parser_expression (parser=0xb7d97dd4) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:6716
#13 0x080fe5f3 in c_parser_expression_conv (parser=0xb7dcda9c) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:6747
#14 0x080f887a in c_parser_statement_after_labels (parser=0xb7dcda9c) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:4416
#15 0x080f997a in c_parser_compound_statement_nostart (parser=0xb7dcda9c) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:4147
#16 0x08107852 in c_parser_compound_statement (parser=0xb7dcda9c) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:3984
#17 0x080f7fc3 in c_parser_declaration_or_fndef (parser=0xb7dcda9c, fndef_ok=1
'\001', static_assert_ok=<value optimized out>, empty_ok=1 '\001', nested=0
'\0', start_attr_ok=<value optimized out>, objc_foreach_object_declaration=0x0)
at ../../../gcc.gnu.org/trunk/gcc/c-parser.c:1749
#18 0x081081da in c_parser_external_declaration (parser=0xb7dcda9c) at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:1354
#19 0x08108a1b in c_parse_file () at
../../../gcc.gnu.org/trunk/gcc/c-parser.c:1242
#20 0x081501b5 in c_common_parse_file () at
../../../gcc.gnu.org/trunk/gcc/c-family/c-opts.c:1094
#21 0x084b0ecf in toplev_main (argc=12, argv=0xbfffe5e4) at
../../../gcc.gnu.org/trunk/gcc/toplev.c:548
#22 0x08169932 in main (argc=Cannot access memory at address 0x80000000
) at ../../../gcc.gnu.org/trunk/gcc/main.c:36
(gdb)