src/share/vm/opto/machnode.cpp

*** 482,491 ****
--- 482,498 ----
  int MachConstantNode::constant_offset() {
    int offset = _constant.offset();
    // Bind the offset lazily.
    if (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);
    }
    return offset;
  }