diff -r 6c7faa516fc6 -r 4f0635e148c1 hotspot/src/share/vm/c1/c1_GraphBuilder.cpp
--- a/hotspot/src/share/vm/c1/c1_GraphBuilder.cpp	Mon Aug 20 09:07:21 2012 -0700
+++ b/hotspot/src/share/vm/c1/c1_GraphBuilder.cpp	Mon Aug 20 09:58:58 2012 -0700
@@ -3058,7 +3058,7 @@
 
   case vmIntrinsics::_Reference_get:
     {
-      if (UseG1GC) {
+      {
         // With java.lang.ref.reference.get() we must go through the
         // intrinsic - when G1 is enabled - even when get() is the root
         // method of the compile so that, if necessary, the value in
@@ -3070,6 +3070,9 @@
         // object removed from the list of discovered references during
         // reference processing.
 
+        // Also we need intrinsic to prevent commoning reads from this field
+        // across safepoint since GC can change its value.
+
         // Set up a stream so that appending instructions works properly.
         ciBytecodeStream s(scope->method());
         s.reset_to_bci(0);
@@ -3226,7 +3229,6 @@
 
 
 bool GraphBuilder::try_inline_intrinsics(ciMethod* callee) {
-  if (!InlineNatives           ) INLINE_BAILOUT("intrinsic method inlining disabled");
   if (callee->is_synchronized()) {
     // We don't currently support any synchronized intrinsics
     return false;
@@ -3234,9 +3236,13 @@
 
   // callee seems like a good candidate
   // determine id
+  vmIntrinsics::ID id = callee->intrinsic_id();
+  if (!InlineNatives && id != vmIntrinsics::_Reference_get) {
+    // InlineNatives does not control Reference.get
+    INLINE_BAILOUT("intrinsic method inlining disabled");
+  }
   bool preserves_state = false;
   bool cantrap = true;
-  vmIntrinsics::ID id = callee->intrinsic_id();
   switch (id) {
     case vmIntrinsics::_arraycopy:
       if (!InlineArrayCopy) return false;
@@ -3376,11 +3382,10 @@
       return true;
 
     case vmIntrinsics::_Reference_get:
-      // It is only when G1 is enabled that we absolutely
-      // need to use the intrinsic version of Reference.get()
-      // so that the value in the referent field, if necessary,
-      // can be registered by the pre-barrier code.
-      if (!UseG1GC) return false;
+      // Use the intrinsic version of Reference.get() so that the value in
+      // the referent field can be registered by the G1 pre-barrier code.
+      // Also to prevent commoning reads from this field across safepoint
+      // since GC can change its value.
       preserves_state = true;
       break;