[Issue 6829] Unsigned rotate standard function in Phobos

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6829



--- Comment #3 from hsteoh at quickfur.ath.cx 2013-07-09 12:06:57 PDT ---
Hmph. That doesn't work. Compiling without -O just makes DMD translate it
literally into shl/shr followed by or. Compiling with -O computes the values
via CTFE, so I changed the code by making a and shift parameters, but DMD still
uses shl/shr followed by or, instead of replacing it with rol/ror, as claimed.

So basically, the pattern either isn't there, or isn't working properly.

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