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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@25980 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/optabs.c b/gcc/optabs.c
index f65c2bb..b5a8423 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -305,9 +305,7 @@ add_equal_note (seq, target, code, op0, op1)
   else
     note = gen_rtx_fmt_ee (code, GET_MODE (target), copy_rtx (op0), copy_rtx (op1));
 
-  REG_NOTES (XVECEXP (seq, 0, XVECLEN (seq, 0) - 1))
-    = gen_rtx_EXPR_LIST (REG_EQUAL, note,
-                        REG_NOTES (XVECEXP (seq, 0, XVECLEN (seq, 0) - 1)));
+  set_unique_reg_note (XVECEXP (seq, 0, XVECLEN (seq, 0) - 1), REG_EQUAL, note);
 
   return 1;
 }
@@ -990,12 +988,11 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
            {
              rtx temp = emit_move_insn (target, target);
 
-             REG_NOTES (temp)
-               = gen_rtx_EXPR_LIST (REG_EQUAL,
-                                    gen_rtx_fmt_ee (binoptab->code, mode,
-                                                    copy_rtx (xop0),
-                                                    copy_rtx (xop1)),
-                                    REG_NOTES (temp));
+             set_unique_reg_note (temp,
+                                  REG_EQUAL,
+                                  gen_rtx_fmt_ee (binoptab->code, mode,
+                                                  copy_rtx (xop0),
+                                                  copy_rtx (xop1)));
            }
          return target;
        }
@@ -1173,12 +1170,11 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
              if (mov_optab->handlers[(int) mode].insn_code != CODE_FOR_nothing)
                {
                  temp = emit_move_insn (product, product);
-                 REG_NOTES (temp)
-                   = gen_rtx_EXPR_LIST (REG_EQUAL,
-                                        gen_rtx_fmt_ee (MULT, mode,
-                                                        copy_rtx (op0),
-                                                        copy_rtx (op1)),
-                                        REG_NOTES (temp));
+                 set_unique_reg_note (temp,
+                                      REG_EQUAL,
+                                      gen_rtx_fmt_ee (MULT, mode,
+                                                      copy_rtx (op0),
+                                                      copy_rtx (op1)));
                }
              return product;
            }
@@ -2545,8 +2541,7 @@ emit_no_conflict_block (insns, target, op0, op1, equiv)
     {
       last = emit_move_insn (target, target);
       if (equiv)
-       REG_NOTES (last)
-         = gen_rtx_EXPR_LIST (REG_EQUAL, equiv, REG_NOTES (last));
+       set_unique_reg_note (last, REG_EQUAL, equiv);
     }
   else
     last = get_last_insn ();
@@ -2659,8 +2654,7 @@ emit_libcall_block (insns, target, result, equiv)
   last = emit_move_insn (target, result);
   if (mov_optab->handlers[(int) GET_MODE (target)].insn_code
       != CODE_FOR_nothing)
-    REG_NOTES (last) = gen_rtx_EXPR_LIST (REG_EQUAL, copy_rtx (equiv),
-                                         REG_NOTES (last));
+    set_unique_reg_note (last, REG_EQUAL, copy_rtx (equiv));
 
   if (prev == 0)
     first = get_insns ();
@@ -3945,12 +3939,11 @@ expand_fix (to, from, unsignedp)
            {
              /* Make a place for a REG_NOTE and add it.  */
              insn = emit_move_insn (to, to);
-             REG_NOTES (insn)
-               = gen_rtx_EXPR_LIST (REG_EQUAL,
-                                    gen_rtx_fmt_e (UNSIGNED_FIX,
-                                                   GET_MODE (to),
-                                                   copy_rtx (from)),
-                                    REG_NOTES (insn));
+             set_unique_reg_note (insn,
+                                  REG_EQUAL,
+                                  gen_rtx_fmt_e (UNSIGNED_FIX,
+                                                 GET_MODE (to),
+                                                 copy_rtx (from)));
            }
          return;
        }