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Re: [tree-ssa]: Easy way to get default def of a variable?

From: Daniel Berlin <dberlin at dberlin dot org>
To: Diego Novillo <dnovillo at redhat dot com>
Cc: Andrew Macleod <amacleod at redhat dot com>,gcc mailing list <gcc at gcc dot gnu dot org>
Date: Thu, 5 Jun 2003 00:38:57 -0400
Subject: Re: [tree-ssa]: Easy way to get default def of a variable?

We now connect them to empty_stmt_expr.  Do you want to connect them to
this table so that we can traverse that table to look for live-
on-entry
or uninitialized uses?  I guess we could do that.

Well, remember, i want the table because right now i have to take a use, and walk the entire def chain backwards, to get the default def's version. This is expensive.

It would let us catch things in the out of ssa pass which accidentally
have no def, much like assign_vars use to do...

We can do this already without that table you mentioned.  I'm missing
something here.

Diego.

Follow-Ups:
- Re: [tree-ssa]: Easy way to get default def of a variable?
  - From: Andrew MacLeod

References:
- Re: [tree-ssa]: Easy way to get default def of a variable?
  - From: Diego Novillo

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