--- old/src/share/vm/c1/c1_Compilation.cpp	2010-06-03 11:27:00.015434000 -0700
+++ new/src/share/vm/c1/c1_Compilation.cpp	2010-06-03 11:26:59.842712000 -0700
@@ -66,9 +66,6 @@
   }
 };
 
-Arena* Compilation::_arena = NULL;
-Compilation* Compilation::_compilation = NULL;
-
 // Implementation of Compilation
 
 
@@ -238,9 +235,23 @@
 }
 
 
+void Compilation::setup_code_buffer(CodeBuffer* code, int call_stub_estimate) {
+  // Preinitialize the consts section to some large size:
+  int locs_buffer_size = 20 * (relocInfo::length_limit + sizeof(relocInfo));
+  char* locs_buffer = NEW_RESOURCE_ARRAY(char, locs_buffer_size);
+  code->insts()->initialize_shared_locs((relocInfo*)locs_buffer,
+                                        locs_buffer_size / sizeof(relocInfo));
+  code->initialize_consts_size(Compilation::desired_max_constant_size());
+  // Call stubs + deopt/exception handler
+  code->initialize_stubs_size((call_stub_estimate * LIR_Assembler::call_stub_size) +
+                              LIR_Assembler::exception_handler_size +
+                              LIR_Assembler::deopt_handler_size);
+}
+
+
 int Compilation::emit_code_body() {
   // emit code
-  Runtime1::setup_code_buffer(code(), allocator()->num_calls());
+  setup_code_buffer(code(), allocator()->num_calls());
   code()->initialize_oop_recorder(env()->oop_recorder());
 
   _masm = new C1_MacroAssembler(code());
@@ -422,7 +433,8 @@
 }
 
 
-Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method, int osr_bci)
+Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
+                         int osr_bci, BufferBlob* buffer_blob)
 : _compiler(compiler)
 , _env(env)
 , _method(method)
@@ -437,8 +449,10 @@
 , _bailout_msg(NULL)
 , _exception_info_list(NULL)
 , _allocator(NULL)
-, _code(Runtime1::get_buffer_blob()->instructions_begin(),
-        Runtime1::get_buffer_blob()->instructions_size())
+, _next_id(0)
+, _next_block_id(0)
+, _code(buffer_blob->instructions_begin(),
+        buffer_blob->instructions_size())
 , _current_instruction(NULL)
 #ifndef PRODUCT
 , _last_instruction_printed(NULL)
@@ -446,17 +460,15 @@
 {
   PhaseTraceTime timeit(_t_compile);
 
-  assert(_arena == NULL, "shouldn't only one instance of Compilation in existence at a time");
   _arena = Thread::current()->resource_area();
-  _compilation = this;
+  _env->set_compiler_data(this);
   _exception_info_list = new ExceptionInfoList();
   _implicit_exception_table.set_size(0);
   compile_method();
 }
 
 Compilation::~Compilation() {
-  _arena = NULL;
-  _compilation = NULL;
+  _env->set_compiler_data(NULL);
 }