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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106736] [13 Regression] ICE in gen_movxo, at
 config/rs6000/mma.md:333
Date: Wed, 31 Aug 2022 21:00:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106736

--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #10)
> (In reply to Segher Boessenkool from comment #9)
> > When MMA is not enabled,
> ...
> > the __vector_{quad,pair} types should not exist,=20
>=20
> Unfortunately, target type initialization only occurs once at the very
> beginning

That is what indirection is for (or copying more likely, in this case).

> and if we don't initialize them because of the command line
> options in affect at the time, then we get problems like PR96125, so we h=
ave
> to initialize these types always, just like we do for built-in functions.

I don't understand?

> I also don't know of any way to attach flags to a type that says when a t=
ype
> is enabled/exists and when it doesn't.

You have to manually add code in strategic places.  Very fiddly, and very
fragile.  Or, can you do stuff in rs6000_option_override_internal?=