https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107335
Bug ID: 107335
Summary: call to throw_bad_cast even with -fno-exceptions
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hiraditya at msn dot com
Target Milestone: ---
Testcase:
#include<iostream>
void foo() {
std::cout << std::endl;
}
$ g++ -std=c++17 -O3 -fno-exceptions
```asm
foo():
mov rax, QWORD PTR std::cout[rip]
push rbx
mov rax, QWORD PTR [rax-24]
mov rbx, QWORD PTR std::cout[rax+240]
test rbx, rbx
je .L10
cmp BYTE PTR [rbx+56], 0
je .L5
movsx esi, BYTE PTR [rbx+67]
.L6:
mov edi, OFFSET FLAT:std::cout
call std::basic_ostream<char, std::char_traits<char> >::put(char)
pop rbx
mov rdi, rax
jmp std::basic_ostream<char, std::char_traits<char> >::flush()
.L5:
mov rdi, rbx
call std::ctype<char>::_M_widen_init() const
mov rax, QWORD PTR [rbx]
mov esi, 10
mov rax, QWORD PTR [rax+48]
cmp rax, OFFSET FLAT:_ZNKSt5ctypeIcE8do_widenEc
je .L6
mov rdi, rbx
call rax
movsx esi, al
jmp .L6
.L10:
call std::__throw_bad_cast() <----------- call to __throw_bad_cast
_GLOBAL__sub_I_foo():
sub rsp, 8
mov edi, OFFSET FLAT:_ZStL8__ioinit
call std::ios_base::Init::Init() [complete object constructor]
mov edx, OFFSET FLAT:__dso_handle
mov esi, OFFSET FLAT:_ZStL8__ioinit
mov edi, OFFSET FLAT:_ZNSt8ios_base4InitD1Ev
add rsp, 8
jmp __cxa_atexit
```
