2014-07-31 Marc Glisse <marc.glisse@inria.fr>

2014-07-31  Marc Glisse  <marc.glisse@inria.fr>

	PR c++/60517
gcc/c/
	* c-typeck.c (c_finish_return): Return 0 instead of the address of
	a local variable.
gcc/cp/
	* typeck.c (maybe_warn_about_returning_address_of_local): Return
	whether it is returning the address of a local variable.
	(check_return_expr): Return 0 instead of the address of a local
	variable.
gcc/c-family/
	* c.opt (-Wreturn-local-addr): Move to common.opt.
gcc/
	* common.opt (-Wreturn-local-addr): Moved from c.opt.
	* gimple-ssa-isolate-paths.c: Include diagnostic-core.h and intl.h.
	(isolate_path): New argument to avoid inserting a trap.
	(find_implicit_erroneous_behaviour): Handle returning the address
	of a local variable.
	(find_explicit_erroneous_behaviour): Likewise.
gcc/testsuite/
	* c-c++-common/addrtmp.c: New file.
	* c-c++-common/uninit-G.c: Adapt.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@213323 138bc75d-0d04-0410-961f-82ee72b054a4