[test] change regressing returncc label from coro to return value

ChangeLog

@@ -24,8 +24,8 @@
         + Protect callmethod from an empty object, missed by fixup_subs
           immediate. #1024
         + Add Coroutine reset and autoreset methods. #564
-        + Fixed Coroutine return and tests, with one returncc regression
-          and one n_regs_used for autoreset bug left. #1106
+        + Fixed Coroutine return and tests. Warning: temp. broke returncc from
+          coro to label, use a return value instead. #1106
         + Add -t8 trace flag for Coroutine states
         + Disabled trace flags -t4 and -t8 with --optimize. #1105
         + Harmonize parrot usage messages

t/compilers/imcc/syn/pcc.t

@@ -165,9 +165,9 @@ pir_output_is( <<'CODE', <<'OUT', "coroutine iterator" );
   .local int i
   i=5
   new $P1, 'Continuation'
-  set_label $P1, after_loop
 loop:
-  $I2 = _addtwo($P1, i)
+    $I2 = _addtwo(i)
+    if $I2 == -1 goto after_loop
     print $I2
     print "\n"
     goto loop
@@ -177,7 +177,6 @@ loop:
 .end
 
 .sub _addtwo
-  .param pmc when_done
   .param int a
   .local int i
   i = 0
@@ -189,7 +188,7 @@ loop:
     goto loop
  done:
   print "done in coroutine\n"
-  when_done()
+  .return(-1)
 .end
 CODE
 5