------- Comment #1 from rguenth at gcc dot gnu dot org 2006-06-24 11:37 -------
Confirmed.
We have
Breakpoint 3, const_binop (code=RDIV_EXPR, arg1=0xa7bc6708, arg2=0xa7bc6690,
notrunc=0) at /home/richard/src/trunk/gcc/fold-const.c:1691
(gdb) call debug_generic_expr (arg1)
__complex__ (1.0e+0, 0.0)
(gdb) call debug_generic_expr (arg2)
__complex__ (1.90000007326203904e+19, 0.0)
which calls the const_binop (PLUS_EXPR, ...) with the results of
const_binop (code=MULT_EXPR, arg1=0xa7bc6660, arg2=0xa7bc6660, notrunc=0)
at /home/richard/src/trunk/gcc/fold-const.c:1554
1554 STRIP_NOPS (arg1);
(gdb) call debug_generic_expr (arg1)
0.0
(gdb) call debug_generic_expr (arg2)
0.0
Value returned is $5 = (union tree_node *) 0xa7bc67e0
(gdb) call debug_generic_expr ($5)
0.0
and
const_binop (code=MULT_EXPR, arg1=0xa7bc6630, arg2=0xa7bc6630, notrunc=0)
at /home/richard/src/trunk/gcc/fold-const.c:1554
1554 STRIP_NOPS (arg1);
(gdb) call debug_generic_expr (arg1)
1.90000007326203904e+19
(gdb) call debug_generic_expr (arg2)
1.90000007326203904e+19
Value returned is $6 = (union tree_node *) 0x0
!?
We hit
1614 /* Don't constant fold this floating point operation if
1615 the result has overflowed and flag_trapping_math. */
1616
1617 if (flag_trapping_math
1618 && MODE_HAS_INFINITIES (mode)
1619 && REAL_VALUE_ISINF (result)
1620 && !REAL_VALUE_ISINF (d1)
1621 && !REAL_VALUE_ISINF (d2))
1622 return NULL_TREE;
because the multiplication result is infinity (in SFmode).
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-06-24 11:37:02
date| |
Summary|ICE on complex |ICE on complex
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28151
