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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/99947] [11 Regression] ICE Segmentation fault
 "during GIMPLE pass: vect" since r11-4714-g092cdbd919849759
Date: Wed, 07 Apr 2021 07:40:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99947

--- Comment #3 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
There's an error reported by valgrind:

=3D=3D18930=3D=3D Invalid read of size 8
=3D=3D18930=3D=3D    at 0x11005A6: quick_push (vec.h:1023)
=3D=3D18930=3D=3D    by 0x11005A6: quick_push (vec.h:1875)
=3D=3D18930=3D=3D    by 0x11005A6: safe_push (vec.h:1888)
=3D=3D18930=3D=3D    by 0x11005A6: vectorizable_induction(_loop_vec_info*,
_stmt_vec_info*, gimple**, _slp_tree*, vec<stmt_info_for_cost, va_heap,
vl_ptr>*) (tree-vect-loop.c:8209)
=3D=3D18930=3D=3D    by 0x10F7B00: vect_transform_stmt(vec_info*, _stmt_vec=
_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*) (tree-vect-stmts.c:10901)
=3D=3D18930=3D=3D    by 0x11298A6: vect_schedule_slp_node(vec_info*, _slp_t=
ree*,
_slp_instance*) (tree-vect-slp.c:6193)
=3D=3D18930=3D=3D    by 0x11364A2: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6355)
=3D=3D18930=3D=3D    by 0x113621F: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6336)
=3D=3D18930=3D=3D    by 0x1136ACF: vect_schedule_slp(vec_info*, vec<_slp_in=
stance*,
va_heap, vl_ptr>) (tree-vect-slp.c:6471)
=3D=3D18930=3D=3D    by 0x1115717: vect_transform_loop(_loop_vec_info*, gim=
ple*)
(tree-vect-loop.c:9535)
=3D=3D18930=3D=3D    by 0x1141FFF: try_vectorize_loop_1(hash_table<simduid_=
to_vf,
false, xcallocator>*&, unsigned int*, loop*, gimple*, gimple*)
(tree-vectorizer.c:1104)
=3D=3D18930=3D=3D    by 0x1142CE0: vectorize_loops() (tree-vectorizer.c:124=
3)
=3D=3D18930=3D=3D    by 0xD99CC7: execute_one_pass(opt_pass*) (passes.c:256=
7)
=3D=3D18930=3D=3D    by 0xD9A6B2: execute_pass_list_1(opt_pass*) (passes.c:=
2656)
=3D=3D18930=3D=3D    by 0xD9A6C4: execute_pass_list_1(opt_pass*) (passes.c:=
2657)
=3D=3D18930=3D=3D  Address 0x5b5dc38 is 8 bytes inside a block of size 40 f=
ree'd
=3D=3D18930=3D=3D    at 0x484239F: realloc (vg_replace_malloc.c:1192)
=3D=3D18930=3D=3D    by 0x1ADDF8D: xrealloc (xmalloc.c:179)
=3D=3D18930=3D=3D    by 0x1100649: reserve<tree_node*> (vec.h:290)
=3D=3D18930=3D=3D    by 0x1100649: reserve (vec.h:1778)
=3D=3D18930=3D=3D    by 0x1100649: safe_push (vec.h:1887)
=3D=3D18930=3D=3D    by 0x1100649: vectorizable_induction(_loop_vec_info*,
_stmt_vec_info*, gimple**, _slp_tree*, vec<stmt_info_for_cost, va_heap,
vl_ptr>*) (tree-vect-loop.c:8209)
=3D=3D18930=3D=3D    by 0x10F7B00: vect_transform_stmt(vec_info*, _stmt_vec=
_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*) (tree-vect-stmts.c:10901)
=3D=3D18930=3D=3D    by 0x11298A6: vect_schedule_slp_node(vec_info*, _slp_t=
ree*,
_slp_instance*) (tree-vect-slp.c:6193)
=3D=3D18930=3D=3D    by 0x11364A2: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6355)
=3D=3D18930=3D=3D    by 0x113621F: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6336)
=3D=3D18930=3D=3D    by 0x1136ACF: vect_schedule_slp(vec_info*, vec<_slp_in=
stance*,
va_heap, vl_ptr>) (tree-vect-slp.c:6471)
=3D=3D18930=3D=3D    by 0x1115717: vect_transform_loop(_loop_vec_info*, gim=
ple*)
(tree-vect-loop.c:9535)
=3D=3D18930=3D=3D    by 0x1141FFF: try_vectorize_loop_1(hash_table<simduid_=
to_vf,
false, xcallocator>*&, unsigned int*, loop*, gimple*, gimple*)
(tree-vectorizer.c:1104)
=3D=3D18930=3D=3D    by 0x1142CE0: vectorize_loops() (tree-vectorizer.c:124=
3)
=3D=3D18930=3D=3D    by 0xD99CC7: execute_one_pass(opt_pass*) (passes.c:256=
7)
=3D=3D18930=3D=3D  Block was alloc'd at
=3D=3D18930=3D=3D    at 0x483D70F: malloc (vg_replace_malloc.c:380)
=3D=3D18930=3D=3D    by 0x1ADDF9F: xrealloc (xmalloc.c:177)
=3D=3D18930=3D=3D    by 0x11000DE: reserve<tree_node*> (vec.h:290)
=3D=3D18930=3D=3D    by 0x11000DE: reserve (vec.h:1778)
=3D=3D18930=3D=3D    by 0x11000DE: safe_push (vec.h:1887)
=3D=3D18930=3D=3D    by 0x11000DE: vectorizable_induction(_loop_vec_info*,
_stmt_vec_info*, gimple**, _slp_tree*, vec<stmt_info_for_cost, va_heap,
vl_ptr>*) (tree-vect-loop.c:8154)
=3D=3D18930=3D=3D    by 0x10F7B00: vect_transform_stmt(vec_info*, _stmt_vec=
_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*) (tree-vect-stmts.c:10901)
=3D=3D18930=3D=3D    by 0x11298A6: vect_schedule_slp_node(vec_info*, _slp_t=
ree*,
_slp_instance*) (tree-vect-slp.c:6193)
=3D=3D18930=3D=3D    by 0x11364A2: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6355)
=3D=3D18930=3D=3D    by 0x113621F: vect_schedule_scc(vec_info*, _slp_tree*,
_slp_instance*, hash_map<_slp_tree*, slp_scc_info,
simple_hashmap_traits<default_hash_traits<_slp_tree*>, slp_scc_info> >&, in=
t&,
vec<_slp_tree*, va_heap, vl_ptr>&) (tree-vect-slp.c:6336)
=3D=3D18930=3D=3D    by 0x1136ACF: vect_schedule_slp(vec_info*, vec<_slp_in=
stance*,
va_heap, vl_ptr>) (tree-vect-slp.c:6471)
=3D=3D18930=3D=3D    by 0x1115717: vect_transform_loop(_loop_vec_info*, gim=
ple*)
(tree-vect-loop.c:9535)
=3D=3D18930=3D=3D    by 0x1141FFF: try_vectorize_loop_1(hash_table<simduid_=
to_vf,
false, xcallocator>*&, unsigned int*, loop*, gimple*, gimple*)
(tree-vectorizer.c:1104)
=3D=3D18930=3D=3D    by 0x1142CE0: vectorize_loops() (tree-vectorizer.c:124=
3)
=3D=3D18930=3D=3D    by 0xD99CC7: execute_one_pass(opt_pass*) (passes.c:256=
7)=