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diff src/share/vm/opto/node.hpp @ 168:7793bd37a336

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6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops Summary: Generate addresses and implicit null checks with narrow oops to avoid decoding. Reviewed-by: jrose, never
author kvn
date Thu, 29 May 2008 12:04:14 -0700
parents a76240c8b133
children d1605aabd0a1
line wrap: on
line diff
--- a/src/share/vm/opto/node.hpp	Wed May 28 21:06:24 2008 -0700
+++ b/src/share/vm/opto/node.hpp	Thu May 29 12:04:14 2008 -0700
@@ -53,6 +53,8 @@
 class ConNode;
 class CountedLoopNode;
 class CountedLoopEndNode;
+class DecodeNNode;
+class EncodePNode;
 class FastLockNode;
 class FastUnlockNode;
 class IfNode;
@@ -438,6 +440,12 @@
 public:
   // Globally replace this node by a given new node, updating all uses.
   void replace_by(Node* new_node);
+  // Globally replace this node by a given new node, updating all uses
+  // and cutting input edges of old node.
+  void subsume_by(Node* new_node) {
+    replace_by(new_node);
+    disconnect_inputs(NULL);
+  }
   void set_req_X( uint i, Node *n, PhaseIterGVN *igvn );
   // Find the one non-null required input.  RegionNode only
   Node *nonnull_req() const;
@@ -577,6 +585,8 @@
       DEFINE_CLASS_ID(CheckCastPP, Type, 2)
       DEFINE_CLASS_ID(CMove, Type, 3)
       DEFINE_CLASS_ID(SafePointScalarObject, Type, 4)
+      DEFINE_CLASS_ID(DecodeN, Type, 5)
+      DEFINE_CLASS_ID(EncodeP, Type, 6)
 
     DEFINE_CLASS_ID(Mem,   Node, 6)
       DEFINE_CLASS_ID(Load,  Mem, 0)
@@ -685,6 +695,8 @@
   DEFINE_CLASS_QUERY(Cmp)
   DEFINE_CLASS_QUERY(CountedLoop)
   DEFINE_CLASS_QUERY(CountedLoopEnd)
+  DEFINE_CLASS_QUERY(DecodeN)
+  DEFINE_CLASS_QUERY(EncodeP)
   DEFINE_CLASS_QUERY(FastLock)
   DEFINE_CLASS_QUERY(FastUnlock)
   DEFINE_CLASS_QUERY(If)