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Date: Thu, 5 Oct 2023 01:08:05 +0100 (BST)
From: "Maciej W. Rozycki" <macro@orcam.me.uk>
To: Martin Jambor <mjambor@suse.cz>
cc: Jan Hubicka <hubicka@ucw.cz>, GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] ipa: Self-DCE of uses of removed call LHSs (PR 108007)
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On Tue, 3 Oct 2023, Martin Jambor wrote:

> > SSA graph may be deep so this may cause stack overflow, so I think we
> > should use worklist here (it is also easy to do).
> >
> > OK with that change.
> > Honza
> 
> I have just committed the following after a bootstrap and testing on
> x86_64-linux.

 This has regressed the native `powerpc64le-linux-gnu' configuration, 
which doesn't bootstrap here anymore:

Comparing stages 2 and 3
Bootstrap comparison failure!
powerpc64le-linux-gnu/libstdc++-v3/src/compatibility-ldbl.o differs
powerpc64le-linux-gnu/libstdc++-v3/src/.libs/compatibility-ldbl.o differs

I have double-checked this is indeed the offending commit, the compiler 
bootstraps just fine as at commit 7eb5ce7f58ed ("Remove pass counting in 
VRP.").

 Shall I file a PR, or can you handle it regardless?  Let me know if you 
need anything from me.

  Maciej