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Re: IMA vs tree-ssa

From: Dale Johannesen <dalej at apple dot com>
To: Richard Henderson <rth at redhat dot com>
Cc: GCC List <gcc at gcc dot gnu dot org>
Date: Thu, 26 Feb 2004 15:17:25 -0800
Subject: Re: IMA vs tree-ssa
References: <F0209661-68A9-11D8-8C0E-000A95D7CD40@apple.com> <20040226230842.GA28463@redhat.com>

On Feb 26, 2004, at 3:08 PM, Richard Henderson wrote:

On Thu, Feb 26, 2004 at 02:20:09PM -0800, Dale Johannesen wrote:

There are several places where tree-ssa does type comparison by
comparing TYPE_MAIN_VARIANT() for equality.  This doesn't work with
IMA, and leads to several different ICEs in various SPECmarks (you
can probably figure out which one the example came from :)


This is a bug in IMA.  When unifying the types, you should either
replace all of them or make all copies be variants.  Clearly the
later is much easier than the former.

That's what Geoff thought wouldn't work. Terrific.

References:
- IMA vs tree-ssa
  - From: Dale Johannesen
- Re: IMA vs tree-ssa
  - From: Richard Henderson

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