fwprop.c (try_fwprop_subst): Use set_unique_reg_note to add the REG_EQ* note.

	* fwprop.c (try_fwprop_subst): Use set_unique_reg_note
	to add the REG_EQ* note.
	* see.c (see_merge_one_use_extension): Likewise.
	* local-alloc.c (update_equiv_regs): Likewise.  Also don't
	turn REG_EQUAL notes into REG_EQUIV notes if the target
	register may have more than one set.
	* function.c (assign_parm_setup_reg): Use set_unique_reg_note.
	* gcse.c (try_replace_reg): Likewise.
	* alias.c (init_alias_analysis): Use find_reg_equal_equiv_note.
	* calls.c (fixup_tail_calls): Likewise.  Abort if there is
	more than one REG_EQUIV note.
	* reload1.c (gen_reload): Use set_unique_reg_note.

From-SVN: r121821

1 files changed, 7 insertions, 12 deletions

diff --git a/gcc/calls.c b/gcc/calls.c
index ab51d17..53e4d3f 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -3130,24 +3130,19 @@ fixup_tail_calls (void)
 
   for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
     {
+      rtx note;
+
       /* There are never REG_EQUIV notes for the incoming arguments
 	 after the NOTE_INSN_FUNCTION_BEG note, so stop if we see it.  */
       if (NOTE_P (insn)
 	  && NOTE_LINE_NUMBER (insn) == NOTE_INSN_FUNCTION_BEG)
 	break;
 
-      while (1)
-	{
-	  rtx note = find_reg_note (insn, REG_EQUIV, 0);
-	  if (note)
-	    {
-	      /* Remove the note and keep looking at the notes for
-		 this insn.  */
-	      remove_note (insn, note);
-	      continue;
-	    }
-	  break;
-	}
+      note = find_reg_note (insn, REG_EQUIV, 0);
+      if (note)
+	remove_note (insn, note);
+      note = find_reg_note (insn, REG_EQUIV, 0);
+      gcc_assert (!note);
     }
 }