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Re: PR 17104
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: Nathan Sidwell <nathan at codesourcery dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Mon, 01 Nov 2004 11:07:21 -0500
- Subject: Re: PR 17104
- References: <email@example.com>
The zero_extend was added for a specific optimization reason. It
was suppose to represent to the compiler tha the load implicitly was
performing a zero_extend, not forcing the compiler to emit a zero_extend.
I would like is some explanation why the original motivation for wrapping
the move in zero_extend a few years ago is superceded or no longer
Maybe we should just remove the "|| mode == SImode" part of the
test. I am worried about making this changed based on "no discernable
difference in SPEC".
Was the SPEC run with 32-bit PowerPC or 64-bit PowerPC?