https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68847
Bug ID: 68847
Summary: [6 Regression] ICE in cxx_eval_constant_expression on
__atomic_compare_exchange (constexpr.c:3719) in c++
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Hello.
ICE looks similar to PR68449, but uses a different atomic and the BT is also
different:
$ cat tc.ii
class RegionLock {
template <unsigned long> void m_fn1();
int spinlock;
} acquire_zero;
int acquire_one;
template <unsigned long> void RegionLock::m_fn1() {
__atomic_compare_exchange(&spinlock, &acquire_zero, &acquire_one, false, 2, 2);
}
$ g++ tc.ii
tc.ii: In member function ‘void RegionLock::m_fn1()’:
tc.ii:7:78: internal compiler error: unexpected expression ‘(void*)((unsigned
int*)(& acquire_zero))’ of kind implicit_conv_expr
__atomic_compare_exchange(&spinlock, &acquire_zero, &acquire_one, false, 2,
2);
^
0x71f657 cxx_eval_constant_expression
../../gcc/cp/constexpr.c:3719
0x72072b cxx_eval_outermost_constant_expr
../../gcc/cp/constexpr.c:3774
0x721803 maybe_constant_value_1
../../gcc/cp/constexpr.c:3960
0x721803 maybe_constant_value(tree_node*, tree_node*)
../../gcc/cp/constexpr.c:3981
0x5e805e build_cxx_call(tree_node*, int, tree_node**, int)
../../gcc/cp/call.c:7724
0x6aca1d cp_build_function_call_vec(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/cp/typeck.c:3596
0x6acb2e build_function_call_vec(unsigned int, vec<unsigned int, va_heap,
vl_ptr>, tree_node*, vec<tree_node*, va_gc, vl_embed>*, vec<tree_node*, va_gc,
vl_embed>*)
../../gcc/cp/typeck.c:3422
0x756a65 resolve_overloaded_builtin(unsigned int, tree_node*, vec<tree_node*,
va_gc, vl_embed>*)
../../gcc/c-family/c-common.c:11363
0x6cf8bf finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../../gcc/cp/semantics.c:2378
0x67c530 cp_parser_postfix_expression
../../gcc/cp/parser.c:6827
0x6841e0 cp_parser_unary_expression
../../gcc/cp/parser.c:7901
0x684cdb cp_parser_cast_expression
../../gcc/cp/parser.c:8578
0x6850f7 cp_parser_binary_expression
../../gcc/cp/parser.c:8679
0x685894 cp_parser_assignment_expression
../../gcc/cp/parser.c:8966
0x68855a cp_parser_expression
../../gcc/cp/parser.c:9135
0x688f10 cp_parser_expression_statement
../../gcc/cp/parser.c:10596
0x677825 cp_parser_statement
../../gcc/cp/parser.c:10447
0x6785a9 cp_parser_statement_seq_opt
../../gcc/cp/parser.c:10719
0x6786cb cp_parser_compound_statement
../../gcc/cp/parser.c:10673
0x695320 cp_parser_function_body
../../gcc/cp/parser.c:20541
