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* [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483
@ 2022-01-25 16:02 asolokha at gmx dot com
2022-01-25 16:59 ` [Bug middle-end/104226] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f marxin at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: asolokha at gmx dot com @ 2022-01-25 16:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
Bug ID: 104226
Summary: ICE in fold_vec_perm, at fold-const.cc:10483
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
g++ 12.0.0 20220123 snapshot (g:2da90ad39bf8fa9ee287e040d1f4411cb7a2e7ed) ICEs
when compiling gcc/testsuite/gcc.target/i386/pr101046.c:
% x86_64-unknown-linux-gnu-g++-12.0.1 -c
gcc/testsuite/gcc.target/i386/pr101046.c
gcc/testsuite/gcc.target/i386/pr101046.c: In function 'U foo()':
gcc/testsuite/gcc.target/i386/pr101046.c:14:74: internal compiler error: in
fold_vec_perm, at fold-const.cc:10483
14 | 5, 5, 0, 2),
U);
|
^
0x798fe8 fold_vec_perm(tree_node*, tree_node*, tree_node*, vec_perm_indices
const&)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/fold-const.cc:10483
0x18cd579 generic_simplify_VEC_PERM_EXPR
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/build/gcc/generic-match.cc:90825
0xe33f7b fold_ternary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/fold-const.cc:12777
0x995083 cxx_eval_trinary_expression
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:5472
0x985798 cxx_eval_constant_expression
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:7119
0x98df9e cxx_eval_internal_function
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:1839
0x98238e cxx_eval_call_expression
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:2395
0x985647 cxx_eval_constant_expression
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:6627
0x988743 cxx_eval_outermost_constant_expr
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:7700
0x98d54e maybe_constant_value(tree_node*, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/constexpr.cc:7994
0xa2548b fold_for_warn(tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/expr.cc:416
0xbc6e08 maybe_warn_about_returning_address_of_local
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/typeck.cc:10067
0xbc6e08 check_return_expr(tree_node*, bool*)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/typeck.cc:10730
0xb6fbde finish_return_stmt(tree_node*)
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/semantics.cc:1195
0xace69c cp_parser_jump_statement
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:14313
0xace69c cp_parser_statement
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:12318
0xacf34d cp_parser_statement_seq_opt
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:12856
0xacf427 cp_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:12808
0xaeffd5 cp_parser_function_body
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:25052
0xaeffd5 cp_parser_ctor_initializer_opt_and_function_body
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220123/work/gcc-12-20220123/gcc/cp/parser.cc:25103
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/104226] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f
2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
@ 2022-01-25 16:59 ` marxin at gcc dot gnu.org
2022-01-25 18:50 ` [Bug middle-end/104226] [12 Regression] " jakub at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-01-25 16:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2022-01-25
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|ICE in fold_vec_perm, at |ICE in fold_vec_perm, at
|fold-const.cc:10483 |fold-const.cc:10483 since
| |r12-6821-g053bcc97f4a59e3f
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Target Milestone|--- |12.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r12-6821-g053bcc97f4a59e3f.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/104226] [12 Regression] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f
2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
2022-01-25 16:59 ` [Bug middle-end/104226] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f marxin at gcc dot gnu.org
@ 2022-01-25 18:50 ` jakub at gcc dot gnu.org
2022-01-25 20:54 ` [Bug c++/104226] " jakub at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-01-25 18:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
CC| |jakub at gcc dot gnu.org
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug c++/104226] [12 Regression] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f
2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
2022-01-25 16:59 ` [Bug middle-end/104226] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f marxin at gcc dot gnu.org
2022-01-25 18:50 ` [Bug middle-end/104226] [12 Regression] " jakub at gcc dot gnu.org
@ 2022-01-25 20:54 ` jakub at gcc dot gnu.org
2022-01-26 18:41 ` cvs-commit at gcc dot gnu.org
2022-01-26 18:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-01-25 20:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 52288
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52288&action=edit
gcc12-pr104226.patch
Untested fix.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/104226] [12 Regression] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f
2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
` (2 preceding siblings ...)
2022-01-25 20:54 ` [Bug c++/104226] " jakub at gcc dot gnu.org
@ 2022-01-26 18:41 ` cvs-commit at gcc dot gnu.org
2022-01-26 18:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-01-26 18:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:abea1c9a252ef7712ab800360e1e0e2697ee14f2
commit r12-6881-gabea1c9a252ef7712ab800360e1e0e2697ee14f2
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jan 26 19:40:29 2022 +0100
c++: Fix up handling of vector CONSTRUCTORs with vectors in it in
constexpr.cc [PR104226]
The middle-end uses sometimes VECTOR_TYPE CONSTRUCTORs that contain
some other VECTOR_TYPE elements in it (should be with compatible element
size and smaller number of elements, e.g. a V8SImode vector can be
constructed as { V4SImode_var_1, V4SImode_var_2 }), and expansion of
__builtin_shufflevector emits these early, so constexpr.cc can see those
too.
constexpr.cc already has special cases for NULL index which is typical
for VECTOR_TYPE CONSTRUCTORs, and for VECTOR_TYPE CONSTRUCTORs that
contain just scalar elts that works just fine - init_subob_ctx just
returns on non-aggregate elts and get_or_insert_ctor_field has
if (TREE_CODE (type) == VECTOR_TYPE && index == NULL_TREE)
{
CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (ctor), index, NULL_TREE);
return &CONSTRUCTOR_ELTS (ctor)->last();
}
handling for it. But for the vector in vector case init_subob_ctx would
try to create a sub-CONSTRUCTOR and even didn't handle the NULL index
case well, so instead of creating the sub-CONSTRUCTOR after the elts
already
in it overwrote the first one. So
(V8SImode) { { 0, 0, 0, 0 }, { 0, 0, 0, 0 } }
became
(V8SImode) { 0, 0, 0, 0 }
The following patch fixes it by not forcing a sub-CONSTRUCTOR for this
vector in vector case.
2022-01-26 Jakub Jelinek <jakub@redhat.com>
PR c++/104226
* constexpr.cc (init_subob_ctx): For vector ctors containing
vector elements, ensure appending to the same ctor instead of
creating another one.
* g++.dg/cpp0x/constexpr-104226.C: New test.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug c++/104226] [12 Regression] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f
2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
` (3 preceding siblings ...)
2022-01-26 18:41 ` cvs-commit at gcc dot gnu.org
@ 2022-01-26 18:44 ` jakub at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-01-26 18:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104226
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2022-01-25 16:02 [Bug middle-end/104226] New: ICE in fold_vec_perm, at fold-const.cc:10483 asolokha at gmx dot com
2022-01-25 16:59 ` [Bug middle-end/104226] ICE in fold_vec_perm, at fold-const.cc:10483 since r12-6821-g053bcc97f4a59e3f marxin at gcc dot gnu.org
2022-01-25 18:50 ` [Bug middle-end/104226] [12 Regression] " jakub at gcc dot gnu.org
2022-01-25 20:54 ` [Bug c++/104226] " jakub at gcc dot gnu.org
2022-01-26 18:41 ` cvs-commit at gcc dot gnu.org
2022-01-26 18:44 ` jakub at gcc dot gnu.org
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