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[avr-gcc-list] [patch] #27663: missed-optimization transforming a byte a

From: Georg-Johann Lay
Subject: [avr-gcc-list] [patch] #27663: missed-optimization transforming a byte array to unsigned long
Date: Wed, 28 Jan 2009 19:50:57 +0100 (MET)


this patch soves the missed-optimization reported in


to a certain degree. It works atop of the adjust_len insn attribute.

With this patch it is the same trouble as with the 1-bit optimization stuff: 
Every single case of some algebra is handled by some insn. This can tune the 
code in some very specual situation, but there are thousands of other 
expressions out in the world...

BTW: How can I generate a patch against the mentioned "adjust_len insn 
attribute"?. I think that would be more handy?


Attachment: avr-27663.patch
Description: Binary data

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