optabs.c (emit_libcall_block): Use no_conflict_move_test.

	* optabs.c (emit_libcall_block): Use no_conflict_move_test.
	(no_conflict_move_test): Update comments.

From-SVN: r104563

gcc/ChangeLog

@@ -7,6 +7,9 @@
 	*  optabs.c (no_conflict_move_test): Don't set must_stay for a
 	clobber / clobber match between dest and p->first.
 
+	* optabs.c (emit_libcall_block): Use no_conflict_move_test.
+	(no_conflict_move_test): Update comments.
+
 2005-09-22  Ranjit Mathew  <rmathew@gcc.gnu.org>
 
 	* doc/install.texi: Update URL for Jacks.

gcc/optabs.c

@@ -3004,9 +3004,10 @@ struct no_conflict_data
   bool must_stay;
 };
 
-/* Called via note_stores by emit_no_conflict_block.  Set P->must_stay
-   if the currently examined clobber / store has to stay in the list of
-   insns that constitute the actual no_conflict block.  */
+/* Called via note_stores by emit_no_conflict_block and emit_libcall_block.
+   Set P->must_stay if the currently examined clobber / store has to stay
+   in the list of insns that constitute the actual no_conflict block /
+   libcall block.  */
 static void
 no_conflict_move_test (rtx dest, rtx set, void *p0)
 {
@@ -3248,23 +3249,27 @@ emit_libcall_block (rtx insns, rtx target, rtx result, rtx equiv)
       next = NEXT_INSN (insn);
 
       if (set != 0 && REG_P (SET_DEST (set))
-	  && REGNO (SET_DEST (set)) >= FIRST_PSEUDO_REGISTER
-	  && (insn == insns
-	      || ((! INSN_P(insns)
-		   || ! reg_mentioned_p (SET_DEST (set), PATTERN (insns)))
-		  && ! reg_used_between_p (SET_DEST (set), insns, insn)
-		  && ! modified_in_p (SET_SRC (set), insns)
-		  && ! modified_between_p (SET_SRC (set), insns, insn))))
+	  && REGNO (SET_DEST (set)) >= FIRST_PSEUDO_REGISTER)
 	{
-	  if (PREV_INSN (insn))
-	    NEXT_INSN (PREV_INSN (insn)) = next;
-	  else
-	    insns = next;
+	  struct no_conflict_data data;
+
+	  data.target = const0_rtx;
+	  data.first = insns;
+	  data.insn = insn;
+	  data.must_stay = 0;
+	  note_stores (PATTERN (insn), no_conflict_move_test, &data);
+	  if (! data.must_stay)
+	    {
+	      if (PREV_INSN (insn))
+		NEXT_INSN (PREV_INSN (insn)) = next;
+	      else
+		insns = next;
 
-	  if (next)
-	    PREV_INSN (next) = PREV_INSN (insn);
+	      if (next)
+		PREV_INSN (next) = PREV_INSN (insn);
 
-	  add_insn (insn);
+	      add_insn (insn);
+	    }
 	}
 
       /* Some ports use a loop to copy large arguments onto the stack.