tree-inline: Add __builtin_stack_{save,restore} pair about inline calls with calls...

tree-inline: Add __builtin_stack_{save,restore} pair about inline calls with calls to alloca [PR113596]

The following patch adds save_NNN = __builtin_stack_save (); ...
__builtin_stack_restore (save_NNN);
pair around inline calls which call alloca (alloca calls because of
VLA vars are ignored in that decision).
The patch doesn't change anything on whether we try to inline such calls or
not, it just fixes the behavior when we inline them despite those checks.
The stack save/restore restores the behavior that alloca acquired regions
are freed at the end of the containing call.

2024-05-03  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/113596
	* tree-inline.cc (expand_call_inline): Emit __builtin_stack_save
	and __builtin_stack_restore calls around inlined functions which
	call alloca.

	* gcc.dg/pr113596.c: New test.
	* gcc.dg/tree-ssa/pr113596.c: New test.