[Bug c++/83814] [8 Regression] ICE: in fold_binary_loc, at fold-const.c:9733

[skpgkp1 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83814

Sunil Pandey <skpgkp1 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |skpgkp1 at gmail dot com

--- Comment #6 from Sunil Pandey <skpgkp1 at gmail dot com> ---
I'm getting similar issue with mariadb build. Here is test case.

$ cat cert_wrapper.i.cpp
extern "C" void *memset(void *, int, unsigned long);
unsigned a;
template <class> void b() {
  int c;
  memset((char *)c + a, 0, a);
}

$g++ --version
g++ (GCC) 8.0.0 20180111 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


$g++  -pie -fPIC -Wl,-z,relro,-z,now -fstack-protector
--param=ssp-buffer-size=4 -fno-rtti -O3 -g -static-libgcc
-fno-omit-frame-pointer -fno-strict-aliasing -fPIC -fvisibility=hidden  -o
cert_wrapper.i.cpp.o -c cert_wrapper.i.cpp
cert_wrapper.i.cpp: In function ‘void b()’:
cert_wrapper.i.cpp:5:29: internal compiler error: in fold_binary_loc, at
fold-const.c:9733
   memset((char *)c + a, 0, a);
                             ^
0x6a5bce fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
        ../../gcc-main.3UZ3/gcc/fold-const.c:9733
0xcc11ec fold(tree_node*)
        ../../gcc-main.3UZ3/gcc/fold-const.c:11957
0x935265 cp_fold
        ../../gcc-main.3UZ3/gcc/cp/cp-gimplify.c:2279
0x935e0c cp_fold_maybe_rvalue
        ../../gcc-main.3UZ3/gcc/cp/cp-gimplify.c:2005
0xb27fb9 warn_for_memset(unsigned int, tree_node*, tree_node*, int)
        ../../gcc-main.3UZ3/gcc/c-family/c-warn.c:1871
0x9fa898 cp_parser_postfix_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:7182
0x9fae70 cp_parser_unary_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:8281
0x9dc7ef cp_parser_cast_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:9049
0x9dcffa cp_parser_binary_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:9150
0x9de7c4 cp_parser_assignment_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:9437
0x9deeda cp_parser_expression
        ../../gcc-main.3UZ3/gcc/cp/parser.c:9606
0x9e0ba8 cp_parser_expression_statement
        ../../gcc-main.3UZ3/gcc/cp/parser.c:11063
0x9e5a8d cp_parser_statement
        ../../gcc-main.3UZ3/gcc/cp/parser.c:10879
0x9e7020 cp_parser_statement_seq_opt
        ../../gcc-main.3UZ3/gcc/cp/parser.c:11206
0x9e70f7 cp_parser_compound_statement
        ../../gcc-main.3UZ3/gcc/cp/parser.c:11160
0x9fd6f0 cp_parser_function_body
        ../../gcc-main.3UZ3/gcc/cp/parser.c:21700
0x9fd6f0 cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc-main.3UZ3/gcc/cp/parser.c:21737
0x9fdfb0 cp_parser_function_definition_after_declarator
        ../../gcc-main.3UZ3/gcc/cp/parser.c:26635
0x9fec9b cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc-main.3UZ3/gcc/cp/parser.c:26551
0x9fec9b cp_parser_init_declarator
        ../../gcc-main.3UZ3/gcc/cp/parser.c:19426
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.


Work fine with previous day compiler.

$g++ --version
g++ (GCC) 8.0.0 20180110 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$g++  -pie -fPIC -Wl,-z,relro,-z,now -fstack-protector
--param=ssp-buffer-size=4 -fno-rtti -O3 -g -static-libgcc
-fno-omit-frame-pointer -fno-strict-aliasing -fPIC -fvisibility=hidden  -o
cert_wrapper.i.cpp.o -c cert_wrapper.i.cpp
$echo $?
0