re PR middle-end/52890 (Revision 185336 causes 10% degradation on cpu2000 benchmark...

re PR middle-end/52890 (Revision 185336 causes 10% degradation on cpu2000 benchmark 252.eon)

2012-11-30  Martin Jambor  <mjambor@suse.cz>

	PR middle-end/52890
	PR tree-optimization/55415
	PR tree-optimization/54386
	PR target/55448
	* ipa-prop.c (ipa_modify_call_arguments): Be optimistic when
	get_pointer_alignment_1 returns false and the base was not a
	dereference.
	* tree-sra.c (access_precludes_ipa_sra_p): New parameter req_align,
	added check for required alignment.  Update the user.

	* testsuite/gcc.dg/ipa/ipa-sra-7.c: New test.
	* testsuite/gcc.dg/ipa/ipa-sra-8.c: Likewise.
	* testsuite/gcc.dg/ipa/ipa-sra-9.c: Likewise.
	* testsuite/gcc.target/i386/pr55448.c: Likewise.

From-SVN: r193998