https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90418
--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> (In reply to Iain Sandoe from comment #2)
> > (In reply to Jakub Jelinek from comment #1)
> Though, I don't understand why that
> if (DEFAULT_ABI == ABI_DARWIN && crtl->calls_eh_return) return false;
> wouldn't work in rs6000_function_ok_for_sibcall, because that conditional
> should make sure we don't have any tail calls in such functions and thus the
> above shouldn't trigger.
Agreed, and that's exactly the code I have present, and I just did a clean
build. However, as you suspect the sibcall is still present. Perhaps
crtl->calls_eh_return is not somehow set or somehow a sib call is generated
without checking it's OK. Will look more later.
(call_insn/j 16 14 17 3 (parallel [
(set (reg:SI 3 r3)
(call (mem:SI (symbol_ref:SI ("_Unwind_RaiseException") [flags
0x403] <function_decl 0x2922e80 _Unwind_RaiseException>) [0
_Unwind_RaiseException S4 A8])
(const_int 32 [0x20])))
(use (const_int 0 [0]))
(simple_return)
]) "/src-local/gcc-git/libgcc/unwind.inc":264:12 682
{*sibcall_value_local32}
(expr_list:REG_CALL_DECL (symbol_ref:SI ("_Unwind_RaiseException") [flags
0x403] <function_decl 0x2922e80 _Unwind_RaiseException>)
(nil))
(expr_list:SI (use (reg:SI 3 r3))
(nil)))
