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From: "manolis.tsamis at vrull dot eu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113089] [14 Regression][aarch64] ICE in
 process_uses_of_deleted_def, at rtl-ssa/changes.cc:252 since
 r14-6605-gc0911c6b357ba9
Date: Wed, 20 Dec 2023 11:03:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113089

--- Comment #8 from Manolis Tsamis <manolis.tsamis at vrull dot eu> ---
(In reply to Alex Coplan from comment #7)
> (In reply to Manolis Tsamis from comment #6)
> > (In reply to Alex Coplan from comment #5)
> > > Also ICEs without -fno-strict-aliasing FWIW, so just -g -O2 -funroll-=
loops
> > > seems to be enough.
> >=20
> > On my local build it doesn't reproduce without -fno-strict-aliasing; I =
just
> > double-checked (GCC master @ 4e0a467302fea56d63b7a6d17f99c0f388960dc7).
>=20
> Hmm, that is odd, I definitely don't need that option even when built from
> the same commit.  How are you configuring GCC?  I suppose it doesn't matt=
er
> since I can reproduce the problem as long as the fix works with/without
> -fno-strict-aliasing.

Odd indeed, but probably something with my configure flags as you mentioned.
Here's what I use:

        --enable-shared \
        --enable-threads=3Dposix \
        --enable-checking=3Drelease \
        --with-system-zlib \
        --enable-__cxa_atexit \
        --disable-libunwind-exceptions \
        --enable-linker-build-id \
        --enable-libstdcxx-backtrace \
        --enable-plugin \
        --enable-initfini-array \
        --enable-gnu-indirect-function \
        --with-isl \
        --enable-lto \
        --with-cpu=3Dneoverse-n1 \
        --disable-multilib \
        --disable-bootstrap

(I think the most uncommon one here is --with-cpu=3Dneoverse-n1 ?)=