Messages in this thread |  | | | Date | Wed, 12 Dec 2007 20:32:13 +0100 | | From | Andi Kleen <> | | Subject | Re: [RFT] Port 0x80 I/O speed | |
> "=A" works on 32-bit systems (only), obviously, and gcc will generally
> produce slightly better code as a result (gcc could really use a
> register renaming/copy propagation step *after* multi-register entities
I believe gcc 4.3 (or maybe 4.2) does that already -- it splits them much
earlier.
-Andi
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