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Re: paradoxical subreg problem
- From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- To: law at redhat dot com
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 28 Jan 02 14:35:28 EST
- Subject: Re: paradoxical subreg problem
Don't assume you can break it into two expressions. Consider the
expression as it stands (and as combine creates it).
Sure, but I'm trying to define what it means by comparison with
two expressions.
So with your assertions in mind are these two expresions equivalent?
(and:SI (subreg:SI (mem:QI) 0) (const_int 255))
(subreg:SI (mem:QI X) 0)
I'd be inclined to say "yes".