tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Handle BUILT_IN_REALLOC like BUILT_IN_...

tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Handle BUILT_IN_REALLOC like BUILT_IN_STRDUP.

2014-05-22  Richard Biener  <rguenther@suse.de>

	* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Handle
	BUILT_IN_REALLOC like BUILT_IN_STRDUP.
	(call_may_clobber_ref_p_1): Handle BUILT_IN_REALLOC as allocation
	and deallocation site.
	* tree-ssa-structalias.c (find_func_aliases_for_builtin_call):
	Handle BUILT_IN_REALLOC similar to BUILT_IN_STRDUP with also
	passing through the incoming points-to set.
	(handle_lhs_call): Use flags argument instead of recomputing it.
	(find_func_aliases_for_call): Call handle_lhs_call with proper
	call return flags.

	* gcc.dg/tree-ssa/alias-33.c: New testcase.

From-SVN: r210802