re PR sanitizer/81715 (asan-stack=1 redzone allocation is too inflexible)

re PR sanitizer/81715 (asan-stack=1 redzone allocation is too inflexible)

	PR sanitizer/81715
	PR testsuite/83882
	* function.h (gimplify_parameters): Add gimple_seq * argument.
	* function.c: Include gimple.h and options.h.
	(gimplify_parameters): Add cleanup argument, add CLOBBER stmts
	for the added local temporaries if needed.
	* gimplify.c (gimplify_body): Adjust gimplify_parameters caller,
	if there are any parameter cleanups, wrap whole body into a
	try/finally with the cleanups.

From-SVN: r256861