* src/ds390/gen.c (genCpl): fixed bit=~(char/bit) bugs, added warning

* src/ds390/gen.c (genCpl): fixed bit=~(char/bit) bugs, added warning
* src/ds390/main.c (_ds390_regparm): don't pass bit params in registers
* src/ds390/ralloc.c (serialRegAssign): spill bits
* src/mcs51/gen.c (genCpl): fixed bit=~(char) bugs, added warning
* support/Util/SDCCerr.c,
* support/Util/SDCCerr.h: added warning W_COMPLEMENT for using bit=~(bit)
* support/regression/tests/bitvars.c: added tests for bitwise complement(~)
* support/regression/tests/bitwise.c: added test for bitwise complement(~)

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3606 4a8a32a2-be11-0410-ad9d-d568d2c75423