------- Comment #2 from rguenth at gcc dot gnu dot org 2006-12-08 07:37 -------
Confirmed. Fails with -m32 -O -funswitch-loops.
GNU C version 4.1.2 20061129 (prerelease) (SUSE Linux) (powerpc64-linux-gnu)
#1 0x00000000102be550 in trunc_int_for_mode (c=0, mode=CCmode)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/explow.c:54
54 gcc_assert (SCALAR_INT_MODE_P (mode));
#2 0x000000001029dd58 in gen_int_mode (c=0, mode=CCmode)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/emit-rtl.c:404
#3 0x00000000105d1394 in simplify_const_binary_operation (code=MINUS,
mode=CCmode, op0=0x400002ab400, op1=0x400002ab400)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/simplify-rtx.c:2573
#4 0x00000000105cb798 in simplify_binary_operation (code=MINUS, mode=CCmode,
op0=0x400002ab400, op1=0x400002ab400)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/simplify-rtx.c:1222
#5 0x00000000105c76e8 in simplify_gen_binary (code=MINUS, mode=CCmode,
op0=0x400002ab400, op1=0x400002ab400)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/simplify-rtx.c:124
#6 0x00000000102c6be0 in implies_p (a=0x40000400540, b=0x400004004e0)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/loop-iv.c:1500
#7 0x00000000102c722c in simplify_using_condition (cond=0x400003fd580,
expr=0xfffffa6ad68, altered=0x0)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/loop-iv.c:1651
#8 0x0000000010853148 in unswitch_single_loop (loops=0x10c6fb60,
loop=0x10c74e80, cond_checked=0x400003fd660, num=2)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/loop-unswitch.c:348
(gdb)
#6 0x00000000102c6be0 in implies_p (a=0x40000400540, b=0x400004004e0)
at ../../gcc41/BUILD/gcc-4.1.2-20061129/gcc/loop-iv.c:1500
1500 if (mode != VOIDmode
(gdb) call debug_rtx (a)
(gt:SI (reg:CC 171)
(const_int 0 [0x0]))
(gdb) call debug_rtx (b)
(ge:SI (reg:CC 171)
(const_int 0 [0x0]))
which of course doesn't make sense to ask with
1500 if (mode != VOIDmode
1501 && rtx_equal_p (op1, opb1)
1502 && simplify_gen_binary (MINUS, mode, opb0, op0) ==
const1_rtx)1503 return true;
--
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
Last reconfirmed|0000-00-00 00:00:00 |2006-12-08 07:37:00
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30113
