rtl.texi (RTX_FRAME_RELATED_P): Add documentation.

 
Thu Mar 25 14:04:54 EST 1999  Andrew MacLeod  <amacleod@cygnus.com>
	* rtl.texi (RTX_FRAME_RELATED_P): Add documentation.
	* rtl.h (struct rtx_def): Update comment for frame_related field.
	(set_unique_reg_note): Declare prototype.
	* dwarf2out.c (dwarf2out_frame_debug_expr): Split out from
	'dwarf2out_frame_debug' to handle only expressions, and process
	component parts of a PARALLEL expression.
	(dwarf2out_frame_debug): Process insns only, and call
	new function 'dwarf2out_frame_debug_expr' for patterns.
	* emit-rtl.c (set_unique_reg_note): New function to add a reg note,
	but if there is an existingone, deletes it first.
	* expmed.c (expand_mult, expand_divmod): Use set_unique_reg_note.
	* optabs.c (add_equal_note, expand_binop): Use set_unique_reg_note.
	(emit_no_conflict_block, emit_libcall_block): Use set_unique_reg_note.
	(expand_fix):  Use set_unique_reg_note.

From-SVN: r25977

gcc/rtl.h

@@ -164,7 +164,7 @@ typedef struct rtx_def
      In a REG, nonzero means this reg refers to the return value
      of the current function.  */
   unsigned integrated : 1;
-  /* 1 in an INSN if this rtx is related to the call frame,
+  /* 1 in an INSN or a SET if this rtx is related to the call frame,
      either changing how we compute the frame address or saving and
      restoring registers in the prologue and epilogue.  
      1 in a MEM if the MEM refers to a scalar, rather than a member of
@@ -997,6 +997,7 @@ extern rtx gen_mem_addressof		PROTO((rtx, union tree_node *));
 extern rtx eliminate_constant_term	PROTO((rtx, rtx *));
 extern rtx expand_complex_abs		PROTO((enum machine_mode, rtx, rtx, int));
 extern enum machine_mode choose_hard_reg_mode PROTO((int, int));
+extern void set_unique_reg_note         PROTO((rtx, enum reg_note, rtx));
 
 /* Functions in rtlanal.c */