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Re: GCC build failed with your patch on 2001-02-17T20:05:01Z.
- To: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- Subject: Re: GCC build failed with your patch on 2001-02-17T20:05:01Z.
- From: Jeffrey A Law <law at redhat dot com>
- Date: Sun, 18 Feb 2001 00:24:36 -0700
- cc: geoffk at redhat dot com, gcc-patches at gcc dot gnu dot org
- Reply-To: law at redhat dot com
In message <10102172208.AA10841@vlsi1.ultra.nyu.edu>you write:
> OK, I see what's wrong. GCSE will, in some cases, emit an insn without
> verifying that it's valid.
There is one case. When cprop can turn a conditional jump into an
unconditional jump, we make the substitution and force a run of
the jump optimizer to clean things up.
That significantly simplifies gcse since if we tried to eliminate a
nop jump we need to rebuild the cfg and recompute all the local
properies, etc in gcse.c
I'd love a way to do that in a cleaner manner.
jeff