src/cpu/x86/vm/x86_64.ad

rev 2506 : [mq]: membar2

@@ -7379,22 +7379,10 @@
   format %{ "MEMBAR-acquire ! (empty encoding)" %}
   ins_encode();
   ins_pipe(empty);
 %}
 
-instruct membar_acquire_lock()
-%{
-  match(MemBarAcquire);
-  predicate(Matcher::prior_fast_lock(n));
-  ins_cost(0);
-
-  size(0);
-  format %{ "MEMBAR-acquire (prior CMPXCHG in FastLock so empty encoding)" %}
-  ins_encode();
-  ins_pipe(empty);
-%}
-
 instruct membar_release()
 %{
   match(MemBarRelease);
   ins_cost(0);
 

@@ -7402,22 +7390,10 @@
   format %{ "MEMBAR-release ! (empty encoding)" %}
   ins_encode();
   ins_pipe(empty);
 %}
 
-instruct membar_release_lock()
-%{
-  match(MemBarRelease);
-  predicate(Matcher::post_fast_unlock(n));
-  ins_cost(0);
-
-  size(0);
-  format %{ "MEMBAR-release (a FastUnlock follows so empty encoding)" %}
-  ins_encode();
-  ins_pipe(empty);
-%}
-
 instruct membar_volatile(rFlagsReg cr) %{
   match(MemBarVolatile);
   effect(KILL cr);
   ins_cost(400);