https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98744
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If the testcase is compiled with -O0, then it looks clearly like a wrong-code:
B::B (_1);
is the call in C::C, while the ctor it is calling is:
void B::B (struct B * const this, const void * * __vtt_parm)
{
const void * _1;
<bb 2> :
_1 = *__vtt_parm_3(D);
this_4(D)->_vptr.B = _1;
return;
}
pushq %rbp
movq %rsp, %rbp
movq %rdi, -8(%rbp)
movq %rsi, -16(%rbp)
movq -16(%rbp), %rax
movq (%rax), %rdx
movq -8(%rbp), %rax
movq %rdx, (%rax)
nop
popq %rbp
and actually uses the second argument which is not passed.
