https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99656
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Summary|ICE in linear_loads_p |[11 Regression] ICE in
| |linear_loads_p
Ever confirmed|0 |1
CC| |rguenth at gcc dot gnu.org,
| |tnfchris at gcc dot gnu.org
Target Milestone|--- |11.0
Last reconfirmed| |2021-03-19
Status|UNCONFIRMED |NEW
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. -fwrapv is not needed
#2 0x000000000183e03e in linear_loads_p (perm_cache=0x7fffffffd080,
root=0x355a838) at ../../src/trunk/gcc/tree-vect-slp-patterns.c:258
258 nloads[i] = all_loads[perm[i].first][perm[i].second];
(gdb) p debug(root)
t.f90:1:24: note: node 0x355a838 (max_nunits=1, refcnt=1)
t.f90:1:24: note: op: VEC_PERM_EXPR
t.f90:1:24: note: { }
t.f90:1:24: note: lane permutation { 0[0] 1[1] }
t.f90:1:24: note: children 0x3559f30 0x355a0c8
$1 = void
(gdb) p debug ((slp_tree)0x3559f30)
t.f90:1:24: note: node 0x3559f30 (max_nunits=2, refcnt=4)
t.f90:1:24: note: op template: _16 = REALPART_EXPR <*t1_9(D)>;
t.f90:1:24: note: stmt 0 _16 = REALPART_EXPR <*t1_9(D)>;
t.f90:1:24: note: stmt 1 _16 = REALPART_EXPR <*t1_9(D)>;
t.f90:1:24: note: load permutation { 0 0 }
$8 = void
(gdb) p debug ((slp_tree)0x355a0c8)
t.f90:1:24: note: node (external) 0x355a0c8 (max_nunits=1, refcnt=2)
t.f90:1:24: note: { _18, _18 }
$9 = void
so one child doesn't have a load permutation. Looks like we merge
PERM_TOP and PERM_EVENEVEN as PERM_EVENEVEN but for the PERM_TOP
child we then record NULL into all_loads.
Tamar?
