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Re: [gelato-gcc] Re: Introduction of GCC improvement work for Itaniumvia Gelato Federation


There were many good ideas and suggestions in the email thread. Speeding up GCC performance with community effort is the ultimate path for Itanium. HP is committed to work with the GCC community to make this happen. I also agree with the observation that we need an intermediate path to beef up the performance on Itanium in order to keep its competitiveness.

Regards,
Shin-Ming Liu

Wen-mei W. Hwu wrote:

I agree with Vladimir wholeheartedly. After working on OpenIMPACT for
years, I reached the conclusion that the ONLY way to make a real difference
for Linux Itanium users is to help improve the mainstream GCC compiler.
That is why my team (esp. Bob Kidd) is actively helping with a strong superblock
path in GCC. As you know, the superblock techniques originated in IMPACT
more than 12 years ago.


We will be glad to work with the community to improve other aspects of the the
GCC (interprocedural pointer analysis, array dependence, memory dataflow, etc.)
based on our experience with IMPACT in the future. I personally see OpenIMPACT
as proving ground for techniques and GCC as the real delivery vehicle for the
software base.


Regards,
wen-mei

At 08:49 AM 9/14/2005, Vladimir Makarov wrote:

Steven Bosscher wrote:

On Wednesday 14 September 2005 10:53, Robert Dewar wrote:


Gerald Pfeifer wrote:


(If so, I'm wondering what it's going to buy the interested parties,
because I have a hard time seeing one of the large GNU/Linux distributors
switching to a compiler different from FSF GCC for Itanium.)


Surely this depends on relative performance ...


My guess is that there are more important things than performance, such as stability, community support, maintenance burden, etc.


I would add single compiler for other linux (and non-linux) ports, more compact code for Itanium (sometimes 2 times more compact), many additional features (last ones are mudflap and stack protector). If it was perfomance only, people would have switched to Intel, ORC or Openimpact compilers long ago. But according Gelato poll, most of Itanium users (like 70%) prefer to use gcc than other compilers.



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