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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107130] [13 Regression] wrong code with -Os
 -fno-tree-ccp -fno-tree-forwprop -fno-tree-fre since
 r13-2900-g001c60ccfeaf9a48
Date: Mon, 03 Oct 2022 15:39:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107130

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |aldyh at gcc dot gn=
u.org

--- Comment #4 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to Martin Li=C5=A1ka from comment #3)
> > Nice, so ffs() with a propagated constant argument now does a popcount()
> > instead?
>=20
> It should not. The problem is op_cfn_popcount is shared by both popcount =
and
> ffs, but the newly added transformation is valid only for popcount.

Ughh, indeed.  Thanks for the analysis Martin.=