Hi!

On Mon, Apr 27, 2020 at 05:09:15PM -0500, will schmidt wrote:
> >     * gcc.target/powerpc/prefix-no-premodify.c: Make sure we do not
> >     generate the non-existent PLWZU instruction if -mcpu=future.
> 
> Should "premodify" instead be "no-update" or "no-update-forms" ?   I
> don't immediately see why "modify" is referenced.

The Power ISA calls it "update form", while GCC calls it "pre-modify"
("pre-increment", "pre-decrement"), or "address side effects", for how
it is put in RTL.

The ISA name makes more sense here I think, yes.


Segher

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