* support/regression/tests/fetchoverlap.c: Added new test case.

	* support/regression/tests/fetchoverlap.c: Added new test case.

	* support/regression/tests/bp.c: Added new test case.

	* support/regression/tests/bug-448984.c: Added new test case.

	* support/regression/tests/pow2shifts.c: Added new test case.

	* src/z80/gen.c: Turned off the noise it normally generates for the release.
	(genlshTwo): Fixed right shift for count > 8.

	* src/z80/ralloc.c: Disabled most of the ACC packing rules as they weren't getting hit and weren't at all safe.

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@1244 4a8a32a2-be11-0410-ad9d-d568d2c75423