The VAlint tool should flag use of any of the bit-wise operators from section 4.2.9 of the VAMS LRM: &, |, ^, ^~, ~^, ~

One was mis-used in the BSIM-IMG code:

bsimimg_body.include:        if ((NBG!=0) & (!$param_given(PHIG2)))  begin

Also, the shift operators from 4.2.11: <<, >>, <<<, and >>> should not be used in compact models.