------- Comment #1 from rguenth at gcc dot gnu dot org 2006-10-21 12:12 -------
Confirmed. Works with 4.2.
We endlessly fold
#5 0x08206aa1 in fold_unary (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:6876
#6 0x08212e3e in fold_build1_stat (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:10475
#7 0x081f8a05 in negate_expr (t=0xb7cd3258)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:1167
#8 0x08206aa1 in fold_unary (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:6876
#9 0x08212e3e in fold_build1_stat (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:10475
#10 0x081f8a05 in negate_expr (t=0xb7cd3258)
...
#28 0x081f8a05 in negate_expr (t=0xb7cd3258)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:1167
1167 tree temp = fold_convert (ntype, TREE_OPERAND (t, 0));
(gdb) call debug_generic_expr (t)
-07fffffff
which has overflowed.
#29 0x08206aa1 in fold_unary (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:6876
#30 0x08212e3e in fold_build1_stat (code=NEGATE_EXPR, type=0xb7c5c284,
op0=0xb7cd3258) at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:10475
#31 0x081f8a05 in negate_expr (t=0xb7cd3258)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:1167
#32 0x0820cb87 in fold_binary (code=CEIL_DIV_EXPR, type=0xb7c5c284,
op0=0xb7cd3258, op1=0xb7c4da50)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:8420
#33 0x08212e8e in fold_build2_stat (code=CEIL_DIV_EXPR, type=0xb7c5c284,
op0=0xb7cd3258, op1=0xb7c4da50)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:10521
#34 0x080fe243 in infer_loop_bounds_from_undefined (loop=0x86a5310)
#32 0x0820cb87 in fold_binary (code=CEIL_DIV_EXPR, type=0xb7c5c284,
op0=0xb7cd3258, op1=0xb7c4da50)
at /home/richard/src/gcc-4_1-branch/gcc/fold-const.c:8420
8420 case ROUND_DIV_EXPR:
(gdb) call debug_generic_expr (op0)
-07fffffff
(gdb) call debug_generic_expr (op1)
-1
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org, rakdver at gcc dot gnu
| |dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |ice-on-valid-code
Known to fail| |4.1.2
Known to work| |4.0.3 4.2.0
Last reconfirmed|0000-00-00 00:00:00 |2006-10-21 12:12:55
date| |
Summary|ICE in "gcc -O -ftrapv" with|[4.1 Regression] ICE in "gcc
|decreasing array index |-O -ftrapv" with decreasing
| |array index
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29534
