re PR middle-end/27226 (Compiler looses track of alignment for emit_block_move)

re PR middle-end/27226 (Compiler looses track of alignment for emit_block_move)

2006-09-01  J"orn Rennecke  <joern.rennecke@st.com>
	Richard Guenther  <rguenther@suse.de>
	Adam Nemet  <anemet@caviumnetworks.com>

	PR middle-end/27226
	* builtins.c (get_pointer_alignment): Handle more forms
	of base addresses that can be used to derive more precise
	information about alignment.

	* gcc.target/mips/memcpy-1.c: New testcase.
	* gcc.dg/pr27226.c: Likewise.

Co-Authored-By: Adam Nemet <anemet@caviumnetworks.com>
Co-Authored-By: Richard Guenther <rguenther@suse.de>
From-SVN: r116641