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Re: gcc/resource.c mark_target_live_regs Question
- To: Mark Mitchell <mark at codesourcery dot com>
- Subject: Re: gcc/resource.c mark_target_live_regs Question
- From: Jeffrey A Law <law at redhat dot com>
- Date: Fri, 16 Feb 2001 10:15:05 -0700
- cc: kenner at vlsi1 dot ultra dot nyu dot edu, rth at redhat dot com, gcc at gcc dot gnu dot org
- Reply-To: law at redhat dot com
In message <20010215094346K.mitchell@codesourcery.com>you write:
> Why is it still safe, then, to go back all the way to the previous
> BARRIER and then use the global_live_at_start information for the
> basic block that starts at this point?
I don't know the precise details (I'd have to sit down a re-read jump
and reorg). But the basic idea is that the state at the barrier is
known to be stable for some reason. We can go forward from there.
jeff