re PR middle-end/57347 (wrong code for bitfield on x86_64-linux at -Os and above)

2013-05-22  Martin Jambor  <mjambor@suse.cz>

	PR middle-end/57347
	* tree.h (contains_bitfld_component_ref_p): Declare.
	* tree-sra.c (contains_bitfld_comp_ref_p): Move...
	* tree.c (contains_bitfld_component_ref_p): ...here.  Adjust its caller.
	* ipa-prop.c (determine_known_aggregate_parts): Check that LHS does
	not access a bit-field.  Assert all final offsets are byte-aligned.

testsuite/
	* gcc.dg/ipa/pr57347.c: New test.

From-SVN: r199252