Andi Kleen wrote:
"=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.
Probably 4.3, then. I don't see 4.2 doing that, or at least not very
successfully. Which is fine, I'm sure they had bigger fish to fry.
Good to hear it has gotten some attention recently.
-hpa
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