analyzer: handle memmove like memcpy

analyzer: handle memmove like memcpy

gcc/analyzer/ChangeLog:
	* region-model-impl-calls.cc (class kf_memcpy): Rename to...
	(class kf_memcpy_memmove): ...this.
	(kf_memcpy::impl_call_pre): Rename to...
	(kf_memcpy_memmove::impl_call_pre): ...this, and check the src for
	poison.
	(register_known_functions): Update for above renaming, and
	register BUILT_IN_MEMMOVE and BUILT_IN_MEMMOVE_CHK.

gcc/testsuite/ChangeLog:
	* gcc.dg/analyzer/memcpy-1.c (test_8a, test_8b): New tests.
	* gcc.dg/analyzer/memmove-1.c: New test, based on memcpy-1.c
	* gcc.dg/analyzer/out-of-bounds-1.c (test7): Update expected
	result for uninit srcBuf.
	* gcc.dg/analyzer/out-of-bounds-5.c (test8, test9): Add
	dg-warnings for memcpy from uninit src vla.
	* gcc.dg/analyzer/pr104308.c (test_memmove_within_uninit):
	Expect creation point note to be missing on riscv*-*-*.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>