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Nigel Tao authored
in 13416:67c0b8c8fb29 "faster code, mainly for rotate" [1]. The codegen can run out of registers if there are too many small-int arithmetic ops. An alternative approach is to copy 6g's sbop/abop codegen to 8g, but this change is less risky. Fixes #3835. [1] http://code.google.com/p/go/source/diff?spec=svn67c0b8c8fb29b1b7b6221977af6b89cae787b941&name=67c0b8c8fb29&r=67c0b8c8fb29b1b7b6221977af6b89cae787b941&format=side&path=/src/cmd/8g/cgen.c R=rsc, remyoudompheng, r CC=golang-dev https://golang.org/cl/6450163
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