diff -r 8c57262447d3 -r 6729bbc1fcd6 src/share/vm/opto/machnode.cpp
--- a/src/share/vm/opto/machnode.cpp	Mon Nov 14 18:38:03 2011 -0800
+++ b/src/share/vm/opto/machnode.cpp	Wed Nov 16 01:39:50 2011 -0800
@@ -480,21 +480,20 @@
 
 //=============================================================================
 int MachConstantNode::constant_offset() {
-  int offset = _constant.offset();
   // Bind the offset lazily.
-  if (offset == -1) {
+  if (_constant.offset() == -1) {
     Compile::ConstantTable& constant_table = Compile::current()->constant_table();
-    // If called from Compile::scratch_emit_size assume the worst-case
-    // for load offsets: half the constant table size.
-    // NOTE: Don't return or calculate the actual offset (which might
-    // be zero) because that leads to problems with e.g. jumpXtnd on
-    // some architectures (cf. add-optimization in SPARC jumpXtnd).
-    if (Compile::current()->in_scratch_emit_size())
-      return constant_table.size() / 2;
-    offset = constant_table.table_base_offset() + constant_table.find_offset(_constant);
-    _constant.set_offset(offset);
+    int offset = constant_table.find_offset(_constant);
+    // If called from Compile::scratch_emit_size return the
+    // pre-calculated offset.
+    // NOTE: If the AD file does some table base offset optimizations
+    // later the AD file needs to take care of this fact.
+    if (Compile::current()->in_scratch_emit_size()) {
+      return constant_table.calculate_table_base_offset() + offset;
+    }
+    _constant.set_offset(constant_table.table_base_offset() + offset);
   }
-  return offset;
+  return _constant.offset();
 }