https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84086
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Target Milestone|--- |8.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
#8 find_givs_in_stmt (stmt=0x7ffff6735460, data=0x7fffffffd8a0)
at /space/rguenther/src/svn/trunk/gcc/tree-ssa-loop-ivopts.c:1446
1446 if (!find_givs_in_stmt_scev (data, stmt, &iv))
(gdb) p debug_gimple_stmt (stmt)
_14 = 0;
#3 0x0000000000df2f50 in resolve_mixers (loop=0x7ffff6a74550,
chrec=0x7ffff67347a0, folded_casts=0x7fffffffd69e)
at /space/rguenther/src/svn/trunk/gcc/tree-scalar-evolution.c:2840
2840 tree ret = instantiate_scev_r (loop_preheader_edge (loop), loop,
NULL,
(gdb) l
2835 {
2836 global_cache = new instantiate_cache_type;
2837 destr = true;
2838 }
2839
2840 tree ret = instantiate_scev_r (loop_preheader_edge (loop), loop,
NULL,
2841 chrec, &fold_conversions, 0);
2842
2843 if (folded_casts && !*folded_casts)
2844 *folded_casts = fold_conversions;
(gdb) p chrec
$5 = (tree) 0x7ffff67347a0
(gdb) p debug_generic_expr ($5)
(sizetype) _21
$6 = void
(gdb) p debug_tree ($5)
<nop_expr 0x7ffff67347a0
type <integer_type 0x7ffff68a6000 sizetype public unsigned DI
size <integer_cst 0x7ffff6892be8 constant 64>
unit-size <integer_cst 0x7ffff6892c00 constant 8>
align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff68a6000 precision:64 min <integer_cst 0x7ffff6892c18 0> max <integer_cst
0x7ffff68934c0 18446744073709551615>>
arg:0 <ssa_name 0x7ffff6a8b9d8 nothrow
def_stmt
version:21 in-free-list>>
$7 = 10
so another case of stale SCEV cache.
