2017-08-28 Richard Biener <rguenther@suse.de>

2017-08-28  Richard Biener  <rguenther@suse.de>

	Backport from mainline
	2017-08-21  Richard Biener  <rguenther@suse.de>

	PR middle-end/81884
	* tree-ssa-alias.c (stmt_kills_ref_p): Handle array accesses
	at struct end conservatively when comparing common bases.

	* g++.dg/torture/pr81884.C: New testcase.

	2017-05-04  Richard Biener  <rguenther@suse.de>

	* tree.c (array_at_struct_end_p): Handle arrays at struct
	end with flexarrays more conservatively.  Refactor and treat
	arrays of arrays or aggregates more strict.  Fix
	VIEW_CONVERT_EXPR handling.  Remove allow_compref argument.
	* tree.h (array_at_struct_end_p): Adjust prototype.
	* gimple-fold.c (get_range_strlen): Likewise.
	* tree-chkp.c (chkp_may_narrow_to_field): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@251379 138bc75d-0d04-0410-961f-82ee72b054a4