https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79664
Bug ID: 79664
Summary: ICE with #pragma omp parallel in constexpr function
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
Target Milestone: ---
The following code snippet (compiled with "-std=c++1y -fopenmp")
triggers an ICE since GCC 5.1.0:
==================================
constexpr int foo()
{
int i = 0;
#pragma omp parallel for
for ( i=0; i<10; ++i ) ;
return 0;
}
==================================
bug.cc: In function 'constexpr int foo()':
bug.cc:8:1: sorry, unimplemented: unexpected AST of kind omp_parallel
}
^
bug.cc:8:1: internal compiler error: in potential_constant_expression_1, at
cp/constexpr.c:4496
0x8531e4 potential_constant_expression_1
../../gcc-5.1.0/gcc/cp/constexpr.c:4496
0x852c8d potential_constant_expression_1
../../gcc-5.1.0/gcc/cp/constexpr.c:4102
0x853c00 potential_rvalue_constant_expression(tree_node*)
../../gcc-5.1.0/gcc/cp/constexpr.c:4521
0x853c00 register_constexpr_fundef(tree_node*, tree_node*)
../../gcc-5.1.0/gcc/cp/constexpr.c:782
0x67d445 maybe_save_function_definition
../../gcc-5.1.0/gcc/cp/decl.c:14095
0x67d445 finish_function(int)
../../gcc-5.1.0/gcc/cp/decl.c:14219
0x76c9c9 cp_parser_function_definition_after_declarator
../../gcc-5.1.0/gcc/cp/parser.c:23489
0x76d863 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc-5.1.0/gcc/cp/parser.c:23395
0x76d863 cp_parser_init_declarator
../../gcc-5.1.0/gcc/cp/parser.c:17072
0x76f915 cp_parser_simple_declaration
../../gcc-5.1.0/gcc/cp/parser.c:11607
0x7693a3 cp_parser_block_declaration
../../gcc-5.1.0/gcc/cp/parser.c:11481
0x773249 cp_parser_declaration
../../gcc-5.1.0/gcc/cp/parser.c:11378
0x7718da cp_parser_declaration_seq_opt
../../gcc-5.1.0/gcc/cp/parser.c:11264
0x771bef cp_parser_translation_unit
../../gcc-5.1.0/gcc/cp/parser.c:4100
0x771bef c_parse_file()
../../gcc-5.1.0/gcc/cp/parser.c:33192
0x8a8ed2 c_common_parse_file()
../../gcc-5.1.0/gcc/c-family/c-opts.c:1057
Please submit a full bug report, [etc.]
