PR bootstrap/41241
	* combine-stack-adj.c (struct csa_memlist): Rename to...
	(struct csa_reflist): ... this.  Rename mem field to ref.
	(free_csa_memlist): Rename to...
	(free_csa_reflist): ... this.
	(record_one_stack_memref): Rename to...
	(record_one_stack_ref): ... this.  Handle also REG_P.
	(try_apply_stack_adjustment): Handle also REG_P.
	(struct record_stack_memrefs_data): Rename to...
	(struct record_stack_refs_data): ... this.  Rename memlist field to
	reflist.
	(record_stack_memrefs): Rename to...
	(record_stack_refs): ... this.  For DEBUG_INSNs keep traversing
	subexpressions instead of failing when a MEM contains SP references.
	For SP itself in DEBUG_INSNs queue it also onto reflist chain.
	(combine_stack_adjustments_for_block): Adjust for mem to ref renaming.

	* gcc.dg/pr41241.c: New test.

From-SVN: r151462