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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/28850] missed call -> jmp transformation;
 redundant unwind stuff with empty finally
Date: Sat, 25 Dec 2021 06:12:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D28850

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2006-08-25 21:59:14         |2021-12-24
           Keywords|patch                       |EH

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
When we get to tailc pass we have the following IR still:


;; Function bar (_Z3barPFvvE, funcdef_no=3D7, decl_uid=3D4010, cgraph_uid=
=3D8,
symbol_order=3D7)

void bar (void (*<T5e0>) (void) f)
{
;;   basic block 2, loop depth 0
;;    pred:       ENTRY
  f_2(D) ();
;;    succ:       4
;;                3

;;   basic block 3, loop depth 0
;;    pred:       2
  return;
;;    succ:       EXIT

;;   basic block 4, loop depth 0
;;    pred:       2
<L0>:
  resx 2
;;    succ:=20=20=20=20=20=20

}

And the resx is removed while in resx pass while we might as well remove it
before hand really because the bb is empty otherwise.=