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Re: [PATCH][RFC] Step 1 to a middle-end type-system

From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
To: dberlin at dberlin dot org
Cc: dnovillo at google dot com, gcc-patches at gcc dot gnu dot org, rguenther at suse dot de
Date: Mon, 25 Jun 2007 23:46:06 EDT
Subject: Re: [PATCH][RFC] Step 1 to a middle-end type-system
References: <Pine.LNX.4.64.0706221139190.24708@zhemvz.fhfr.qr> <467FCFF5.80008@google.com> <Pine.LNX.4.64.0706251639300.24708@zhemvz.fhfr.qr> <467FD773.3010607@google.com> <10706251559.AA07123@vlsi1.ultra.nyu.edu> <468019A3.8020205@google.com> <4aca3dc20706251244x460389e4qd8c8dbf3cc9db235@mail.gmail.com>

> Note that my particular suggestion was that #2 be accomplished by
> adding a field to the types (TYPE_EQUIVALENCE), rather than
> transforming the actual types.   If you transform the actual types,
> you have to do something about debug info.

I don't see the issue as transforming types, but of deciding which NOP_EXPRs
can be safely deleted and when two types are equivalent for the purpose
of validating the tree.  Debugging info would not be affected since you
wouldn't be touching the TREE_TYPE of a decl.

References:
- [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Richard Guenther
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Diego Novillo
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Richard Guenther
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Diego Novillo
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Richard Kenner
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Diego Novillo
- Re: [PATCH][RFC] Step 1 to a middle-end type-system
  - From: Daniel Berlin

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