* insn-notes.def (UPDATE_SJLJ_CONTEXT): New note.
	* builtins.c (expand_builtin_update_setjmp_buf): Make global.
	(expand_stack_restore): Call record_new_stack_level.
	(expand_stack_save): Do not call do_pending_stack_adjust.
	* builtins.h (expand_builtin_update_setjmp_buf): Declare.
	* calls.c (expand_call): Call record_new_stack_level for alloca.
	* except.c (sjlj_mark_call_sites): Expand builtin_update_setjmp_buf
	wherever a NOTE_INSN_UPDATE_SJLJ_CONTEXT note is present.
	(update_sjlj_context): New global function.
	* except.h (update_sjlj_context): Declare.
	* explow.c (record_new_stack_level): New global function.
	(allocate_dynamic_stack_space): Call record_new_stack_level.
	* explow.h (record_new_stack_level): Declare.
	* final.c (final_scan_insn): Deal with NOTE_INSN_UPDATE_SJLJ_CONTEXT.
	* cfgrtl.c (duplicate_insn_chain): Likewise.

Co-Authored-By: Tristan Gingold <gingold@adacore.com>

From-SVN: r223348