Fix compute_complex_assign_jump_func

Fix compute_complex_assign_jump_func

2017-01-23  Martin Jambor  <mjambor@suse.cz>

	* ipa-prop.c (load_from_param_1): Removed.
	(load_from_unmodified_param): Bits from load_from_param_1 put back
	here.
	(load_from_param): Removed.
	(compute_complex_assign_jump_func): Removed stmt2 and just replaced it
	with stmt.  Reverted back to use of load_from_unmodified_param.

testsuite/
	* gcc.dg/ipa/vrp8.c: New test.

From-SVN: r244803