[LLVMdev] Possible bug in ExpandShiftWithUnknownAmountBit

Duncan Sands baldrick at free.fr
Fri Dec 4 12:42:36 PST 2009

PS: For a small optimization, in the case where Amt is bigger than 32
(or whatever NVTBits is) you might want to use an "and" to mask off
the top bits of Amt rather than subtracting 32 (if Amt is 64 or greater
then the result of the shift was undefined anyway, so it is ok to mask
off all the upper bits).

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