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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/94123] [10 regression] r10-1734, SVN r273240, causes
 gcc.target/powerpc/pr87507.c to fail
Date: Tue, 24 Mar 2020 18:48:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94123

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |bergner at gcc dot =
gnu.org

--- Comment #8 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #7)
> Just default rules applied - the bug is new in GCC 10.  Since it's also a
> testsuite regression it woudl be nice to at least make that clean.  If
> we understand why the regression happens and can live with it we can demo=
te
> it to P2.

So Segher's commit that caused this, added -fsplit-wide-types-early.  If you
use -fno-split-wide-types-early then we get the expected code.  It's strange
that both Segher's patch and my fix from PR87507 tries to break these TImode
uses up early and somehow, we're tripping over each other.  I will continue=
 to
debug this and generate a fix.

That said, I think given there is a work around and that __int128 usage isn=
't
all that common, that we can probably reduce the priority of this to P2.=