function.c (emit_use_return_register_into_block): On cc0 targets, do not emit…

function.c (emit_use_return_register_into_block): On cc0 targets, do not emit the sequence between cc0 setter and user.

	* function.c (emit_use_return_register_into_block): On cc0 targets,
	do not emit the sequence between cc0 setter and user.

From-SVN: r197036

gcc/ChangeLog

+2013-03-25  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* function.c (emit_use_return_register_into_block): On cc0 targets,
+	do not emit the sequence between cc0 setter and user.
+
 2013-03-25  Kai Tietz  <ktietz@redhat.com>
 
 	* config/i386/predicates.md (local_symbolic_operand): Interpret

gcc/function.c

@@ -5598,12 +5598,17 @@ prepare_shrink_wrap (basic_block entry_block)
 static void
 emit_use_return_register_into_block (basic_block bb)
 {
-  rtx seq;
+  rtx seq, insn;
   start_sequence ();
   use_return_register ();
   seq = get_insns ();
   end_sequence ();
-  emit_insn_before (seq, BB_END (bb));
+  insn = BB_END (bb);
+#ifdef HAVE_cc0
+  if (reg_mentioned_p (cc0_rtx, PATTERN (insn)))
+    insn = prev_cc0_setter (insn);
+#endif
+  emit_insn_before (seq, insn);
 }