r196878 - in /trunk/gcc: ChangeLog tree-ssa-loo...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Thu Mar 21 14:45:36 2013
New Revision: 196878

URL: http://gcc.gnu.org/viewcvs?rev=196878&root=gcc&view=rev
Log:
2013-03-21  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/39326
	* tree-ssa-loop-im.c (UNANALYZABLE_MEM_ID): New define.
	(MEM_ANALYZABLE): Adjust.
	(record_mem_ref_loc): Move bitmap ops ...
	(gather_mem_refs_stmt): ... here.  Use the shared mem-ref for
	unanalyzable refs, do not record locations for it.
	(analyze_memory_references): Allocate ref zero as shared
	unanalyzable ref.
	(refs_independent_p): Do not test for unanalyzed mems here.
	(ref_indep_loop_p_1): Special-case disambiguation against
	the unanalyzed ref.
	(ref_indep_loop_p): Assert we are not queried for the
	unanalyzed mem.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-im.c