Merge

src/cpu/sparc/vm/c1_FrameMap_sparc.cpp

@@ -181,8 +181,8 @@ bool FrameMap::is_caller_save_register (Register r) {
 }
 
 
-void FrameMap::init () {
-  if (_init_done) return;
+void FrameMap::initialize() {
+  assert(!_init_done, "once");
 
   int i=0;
   // Register usage:

src/cpu/x86/vm/assembler_x86.cpp

@@ -7643,6 +7643,9 @@ void MacroAssembler::verify_oop(Register reg, const char* s) {
   // Pass register number to verify_oop_subroutine
   char* b = new char[strlen(s) + 50];
   sprintf(b, "verify_oop: %s: %s", reg->name(), s);
+#ifdef _LP64
+  push(rscratch1);                    // save r10, trashed by movptr()
+#endif
   push(rax);                          // save rax,
   push(reg);                          // pass register argument
   ExternalAddress buffer((address) b);
@@ -7653,6 +7656,7 @@ void MacroAssembler::verify_oop(Register reg, const char* s) {
   // call indirectly to solve generation ordering problem
   movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
   call(rax);
+  // Caller pops the arguments (oop, message) and restores rax, r10
 }
 
 
@@ -7767,6 +7771,9 @@ void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
   char* b = new char[strlen(s) + 50];
   sprintf(b, "verify_oop_addr: %s", s);
 
+#ifdef _LP64
+  push(rscratch1);                    // save r10, trashed by movptr()
+#endif
   push(rax);                          // save rax,
   // addr may contain rsp so we will have to adjust it based on the push
   // we just did
@@ -7789,7 +7796,7 @@ void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
   // call indirectly to solve generation ordering problem
   movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
   call(rax);
-  // Caller pops the arguments and restores rax, from the stack
+  // Caller pops the arguments (addr, message) and restores rax, r10.
 }
 
 void MacroAssembler::verify_tlab() {

src/cpu/x86/vm/c1_FrameMap_x86.cpp

@@ -136,8 +136,8 @@ XMMRegister FrameMap::nr2xmmreg(int rnr) {
 //               FrameMap
 //--------------------------------------------------------
 
-void FrameMap::init() {
-  if (_init_done) return;
+void FrameMap::initialize() {
+  assert(!_init_done, "once");
 
   assert(nof_cpu_regs == LP64_ONLY(16) NOT_LP64(8), "wrong number of CPU registers");
   map_register(0, rsi);  rsi_opr = LIR_OprFact::single_cpu(0);

src/cpu/x86/vm/stubGenerator_x86_64.cpp

@@ -914,6 +914,7 @@ class StubGenerator: public StubCodeGenerator {
   //  * [tos + 5]: error message (char*)
   //  * [tos + 6]: object to verify (oop)
   //  * [tos + 7]: saved rax - saved by caller and bashed
+  //  * [tos + 8]: saved r10 (rscratch1) - saved by caller
   //  * = popped on exit
   address generate_verify_oop() {
     StubCodeMark mark(this, "StubRoutines", "verify_oop");
@@ -934,6 +935,7 @@ class StubGenerator: public StubCodeGenerator {
            // After previous pushes.
            oop_to_verify = 6 * wordSize,
            saved_rax     = 7 * wordSize,
+           saved_r10     = 8 * wordSize,
 
            // Before the call to MacroAssembler::debug(), see below.
            return_addr   = 16 * wordSize,
@@ -983,15 +985,17 @@ class StubGenerator: public StubCodeGenerator {
     // return if everything seems ok
     __ bind(exit);
     __ movptr(rax, Address(rsp, saved_rax));     // get saved rax back
+    __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
     __ pop(c_rarg3);                             // restore c_rarg3
     __ pop(c_rarg2);                             // restore c_rarg2
     __ pop(r12);                                 // restore r12
     __ popf();                                   // restore flags
-    __ ret(3 * wordSize);                        // pop caller saved stuff
+    __ ret(4 * wordSize);                        // pop caller saved stuff
 
     // handle errors
     __ bind(error);
     __ movptr(rax, Address(rsp, saved_rax));     // get saved rax back
+    __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back
     __ pop(c_rarg3);                             // get saved c_rarg3 back
     __ pop(c_rarg2);                             // get saved c_rarg2 back
     __ pop(r12);                                 // get saved r12 back
@@ -1009,6 +1013,7 @@ class StubGenerator: public StubCodeGenerator {
     //   * [tos + 17] error message (char*)
     //   * [tos + 18] object to verify (oop)
     //   * [tos + 19] saved rax - saved by caller and bashed
+    //   * [tos + 20] saved r10 (rscratch1) - saved by caller
     //   * = popped on exit
 
     __ movptr(c_rarg0, Address(rsp, error_msg));    // pass address of error message
@@ -1021,7 +1026,7 @@ class StubGenerator: public StubCodeGenerator {
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64)));
     __ mov(rsp, r12);                               // restore rsp
     __ popa();                                      // pop registers (includes r12)
-    __ ret(3 * wordSize);                           // pop caller saved stuff
+    __ ret(4 * wordSize);                           // pop caller saved stuff
 
     return start;
   }

src/share/vm/c1/c1_Canonicalizer.cpp

@@ -26,9 +26,11 @@
 #include "incls/_c1_Canonicalizer.cpp.incl"
 
 
-static void do_print_value(Value* vp) {
-  (*vp)->print_line();
-}
+class PrintValueVisitor: public ValueVisitor {
+  void visit(Value* vp) {
+    (*vp)->print_line();
+  }
+};
 
 void Canonicalizer::set_canonical(Value x) {
   assert(x != NULL, "value must exist");
@@ -37,10 +39,11 @@ void Canonicalizer::set_canonical(Value x) {
   // in the instructions).
   if (canonical() != x) {
     if (PrintCanonicalization) {
-      canonical()->input_values_do(do_print_value);
+      PrintValueVisitor do_print_value;
+      canonical()->input_values_do(&do_print_value);
       canonical()->print_line();
       tty->print_cr("canonicalized to:");
-      x->input_values_do(do_print_value);
+      x->input_values_do(&do_print_value);
       x->print_line();
       tty->cr();
     }
@@ -202,7 +205,7 @@ void Canonicalizer::do_StoreField     (StoreField*      x) {
     // limit this optimization to current block
     if (value != NULL && in_current_block(conv)) {
       set_canonical(new StoreField(x->obj(), x->offset(), x->field(), value, x->is_static(),
-                                   x->lock_stack(), x->state_before(), x->is_loaded(), x->is_initialized()));
+                                       x->lock_stack(), x->state_before(), x->is_loaded(), x->is_initialized()));
       return;
     }
   }

src/share/vm/c1/c1_Compilation.cpp

@@ -66,9 +66,6 @@ class PhaseTraceTime: public TraceTime {
   }
 };
 
-Arena* Compilation::_arena = NULL;
-Compilation* Compilation::_compilation = NULL;
-
 // Implementation of Compilation
 
 
@@ -238,9 +235,23 @@ void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
 }
 
 
+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 @@ void Compilation::generate_exception_handler_table() {
 }
 
 
-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 @@ Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* metho
 , _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 @@ Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* metho
 {
   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);
 }
 
 

src/share/vm/c1/c1_Compilation.hpp

@@ -53,15 +53,11 @@ define_stack(ExceptionInfoList,  ExceptionInfoArray)
 
 class Compilation: public StackObj {
   friend class CompilationResourceObj;
- private:
-
-  static Arena* _arena;
-  static Arena* arena() { return _arena; }
-
-  static Compilation* _compilation;
-
  private:
   // compilation specifics
+  Arena* _arena;
+  int _next_id;
+  int _next_block_id;
   AbstractCompiler*  _compiler;
   ciEnv*             _env;
   ciMethod*          _method;
@@ -108,10 +104,14 @@ class Compilation: public StackObj {
 
  public:
   // creation
-  Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method, int osr_bci);
+  Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
+              int osr_bci, BufferBlob* buffer_blob);
   ~Compilation();
 
-  static Compilation* current_compilation()      { return _compilation; }
+
+  static Compilation* current() {
+    return (Compilation*) ciEnv::current()->compiler_data();
+  }
 
   // accessors
   ciEnv* env() const                             { return _env; }
@@ -128,6 +128,15 @@ class Compilation: public StackObj {
   CodeBuffer* code()                             { return &_code; }
   C1_MacroAssembler* masm() const                { return _masm; }
   CodeOffsets* offsets()                         { return &_offsets; }
+  Arena* arena()                                 { return _arena; }
+
+  // Instruction ids
+  int get_next_id()                              { return _next_id++; }
+  int number_of_instructions() const             { return _next_id; }
+
+  // BlockBegin ids
+  int get_next_block_id()                        { return _next_block_id++; }
+  int number_of_blocks() const                   { return _next_block_id; }
 
   // setters
   void set_has_exception_handlers(bool f)        { _has_exception_handlers = f; }
@@ -158,6 +167,15 @@ class Compilation: public StackObj {
   bool bailed_out() const                        { return _bailout_msg != NULL; }
   const char* bailout_msg() const                { return _bailout_msg; }
 
+  static int desired_max_code_buffer_size() {
+    return (int) NMethodSizeLimit;  // default 256K or 512K
+  }
+  static int desired_max_constant_size() {
+    return (int) NMethodSizeLimit / 10;  // about 25K
+  }
+
+  static void setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);
+
   // timers
   static void print_timers();
 
@@ -203,7 +221,10 @@ class InstructionMark: public StackObj {
 // Base class for objects allocated by the compiler in the compilation arena
 class CompilationResourceObj ALLOCATION_SUPER_CLASS_SPEC {
  public:
-  void* operator new(size_t size) { return Compilation::arena()->Amalloc(size); }
+  void* operator new(size_t size) { return Compilation::current()->arena()->Amalloc(size); }
+  void* operator new(size_t size, Arena* arena) {
+    return arena->Amalloc(size);
+  }
   void  operator delete(void* p) {} // nothing to do
 };
 

src/share/vm/c1/c1_Compiler.cpp

@@ -27,9 +27,6 @@
 
 volatile int Compiler::_runtimes = uninitialized;
 
-volatile bool Compiler::_compiling = false;
-
-
 Compiler::Compiler() {
 }
 
@@ -39,47 +36,62 @@ Compiler::~Compiler() {
 }
 
 
+void Compiler::initialize_all() {
+  BufferBlob* buffer_blob = CompilerThread::current()->get_buffer_blob();
+  Arena* arena = new Arena();
+  Runtime1::initialize(buffer_blob);
+  FrameMap::initialize();
+  // initialize data structures
+  ValueType::initialize(arena);
+  // Instruction::initialize();
+  // BlockBegin::initialize();
+  GraphBuilder::initialize();
+  // note: to use more than one instance of LinearScan at a time this function call has to
+  //       be moved somewhere outside of this constructor:
+  Interval::initialize(arena);
+}
+
+
 void Compiler::initialize() {
   if (_runtimes != initialized) {
-    initialize_runtimes( Runtime1::initialize, &_runtimes);
+    initialize_runtimes( initialize_all, &_runtimes);
   }
   mark_initialized();
 }
 
 
+BufferBlob* Compiler::build_buffer_blob() {
+  // setup CodeBuffer.  Preallocate a BufferBlob of size
+  // NMethodSizeLimit plus some extra space for constants.
+  int code_buffer_size = Compilation::desired_max_code_buffer_size() +
+    Compilation::desired_max_constant_size();
+  BufferBlob* blob = BufferBlob::create("Compiler1 temporary CodeBuffer",
+                                        code_buffer_size);
+  guarantee(blob != NULL, "must create initial code buffer");
+  return blob;
+}
+
+
 void Compiler::compile_method(ciEnv* env, ciMethod* method, int entry_bci) {
+  // Allocate buffer blob once at startup since allocation for each
+  // compilation seems to be too expensive (at least on Intel win32).
+  BufferBlob* buffer_blob = CompilerThread::current()->get_buffer_blob();
+  if (buffer_blob == NULL) {
+    buffer_blob = build_buffer_blob();
+    CompilerThread::current()->set_buffer_blob(buffer_blob);
+  }
 
   if (!is_initialized()) {
     initialize();
   }
   // invoke compilation
-#ifdef TIERED
-  // We are thread in native here...
-  CompilerThread* thread = CompilerThread::current();
-  {
-    ThreadInVMfromNative tv(thread);
-    MutexLocker only_one (C1_lock, thread);
-    while ( _compiling) {
-      C1_lock->wait();
-    }
-    _compiling = true;
-  }
-#endif // TIERED
   {
     // We are nested here because we need for the destructor
     // of Compilation to occur before we release the any
     // competing compiler thread
     ResourceMark rm;
-    Compilation c(this, env, method, entry_bci);
-  }
-#ifdef TIERED
-  {
-    ThreadInVMfromNative tv(thread);
-    MutexLocker only_one (C1_lock, thread);
-    _compiling = false;
-    C1_lock->notify();
+    Compilation c(this, env, method, entry_bci, buffer_blob);
   }
-#endif // TIERED
 }
 
 

src/share/vm/c1/c1_Compiler.hpp

@@ -31,10 +31,6 @@ class Compiler: public AbstractCompiler {
  // Tracks whether runtime has been initialized
  static volatile int _runtimes;
 
- // In tiered it is possible for multiple threads to want to do compilation
- // only one can enter c1 at a time
- static volatile bool _compiling;
-
  public:
   // Creation
   Compiler();
@@ -47,6 +43,7 @@ class Compiler: public AbstractCompiler {
   virtual bool is_c1() { return true; };
 #endif // TIERED
 
+  BufferBlob* build_buffer_blob();
 
   // Missing feature tests
   virtual bool supports_native()                 { return true; }
@@ -58,6 +55,7 @@ class Compiler: public AbstractCompiler {
 
   // Initialization
   virtual void initialize();
+  static  void initialize_all();
 
   // Compilation entry point for methods
   virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci);

src/share/vm/c1/c1_FrameMap.cpp

@@ -153,7 +153,7 @@ int       FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs];
 
 
 FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) {
-  if (!_init_done) init();
+  assert(_init_done, "should already be completed");
 
   _framesize = -1;
   _num_spills = -1;

src/share/vm/c1/c1_FrameMap.hpp

@@ -235,7 +235,7 @@ class FrameMap : public CompilationResourceObj {
     return _caller_save_fpu_regs[i];
   }
 
-  static void init();
+  static void initialize();
 };
 
 //               CallingConvention

src/share/vm/c1/c1_GraphBuilder.cpp

@@ -2530,16 +2530,10 @@ void GraphBuilder::iterate_all_blocks(bool start_in_current_block_for_inlining)
 }
 
 
-bool GraphBuilder::_is_initialized = false;
 bool GraphBuilder::_can_trap      [Bytecodes::number_of_java_codes];
 bool GraphBuilder::_is_async[Bytecodes::number_of_java_codes];
 
 void GraphBuilder::initialize() {
-  // make sure initialization happens only once (need a
-  // lock here, if we allow the compiler to be re-entrant)
-  if (is_initialized()) return;
-  _is_initialized = true;
-
   // the following bytecodes are assumed to potentially
   // throw exceptions in compiled code - note that e.g.
   // monitorexit & the return bytecodes do not throw
@@ -2855,7 +2849,6 @@ GraphBuilder::GraphBuilder(Compilation* compilation, IRScope* scope)
   BlockList* bci2block = blm.bci2block();
   BlockBegin* start_block = bci2block->at(0);
 
-  assert(is_initialized(), "GraphBuilder must have been initialized");
   push_root_scope(scope, bci2block, start_block);
 
   // setup state for std entry

src/share/vm/c1/c1_GraphBuilder.hpp

@@ -162,7 +162,6 @@ class GraphBuilder VALUE_OBJ_CLASS_SPEC {
   };
 
   // for all GraphBuilders
-  static bool       _is_initialized;             // true if trap tables were initialized, false otherwise
   static bool       _can_trap[Bytecodes::number_of_java_codes];
   static bool       _is_async[Bytecodes::number_of_java_codes];
 
@@ -268,7 +267,6 @@ class GraphBuilder VALUE_OBJ_CLASS_SPEC {
   Instruction* append_split(StateSplit* instr);
 
   // other helpers
-  static bool is_initialized()                   { return _is_initialized; }
   static bool is_async(Bytecodes::Code code) {
     assert(0 <= code && code < Bytecodes::number_of_java_codes, "illegal bytecode");
     return _is_async[code];

src/share/vm/c1/c1_IR.cpp

@@ -287,11 +287,6 @@ void CodeEmitInfo::add_register_oop(LIR_Opr opr) {
 IR::IR(Compilation* compilation, ciMethod* method, int osr_bci) :
     _locals_size(in_WordSize(-1))
   , _num_loops(0) {
-  // initialize data structures
-  ValueType::initialize();
-  Instruction::initialize();
-  BlockBegin::initialize();
-  GraphBuilder::initialize();
   // setup IR fields
   _compilation = compilation;
   _top_scope   = new IRScope(compilation, NULL, -1, method, osr_bci, true);
@@ -381,15 +376,15 @@ void IR::split_critical_edges() {
 }
 
 
-class UseCountComputer: public AllStatic {
+class UseCountComputer: public ValueVisitor, BlockClosure {
  private:
-  static void update_use_count(Value* n) {
+  void visit(Value* n) {
     // Local instructions and Phis for expression stack values at the
     // start of basic blocks are not added to the instruction list
     if ((*n)->bci() == -99 && (*n)->as_Local() == NULL &&
         (*n)->as_Phi() == NULL) {
       assert(false, "a node was not appended to the graph");
-      Compilation::current_compilation()->bailout("a node was not appended to the graph");
+      Compilation::current()->bailout("a node was not appended to the graph");
     }
     // use n's input if not visited before
     if (!(*n)->is_pinned() && !(*n)->has_uses()) {
@@ -402,31 +397,31 @@ class UseCountComputer: public AllStatic {
     (*n)->_use_count++;
   }
 
-  static Values* worklist;
-  static int depth;
+  Values* worklist;
+  int depth;
   enum {
     max_recurse_depth = 20
   };
 
-  static void uses_do(Value* n) {
+  void uses_do(Value* n) {
     depth++;
     if (depth > max_recurse_depth) {
       // don't allow the traversal to recurse too deeply
       worklist->push(*n);
     } else {
-      (*n)->input_values_do(update_use_count);
+      (*n)->input_values_do(this);
       // special handling for some instructions
       if ((*n)->as_BlockEnd() != NULL) {
         // note on BlockEnd:
         //   must 'use' the stack only if the method doesn't
         //   terminate, however, in those cases stack is empty
-        (*n)->state_values_do(update_use_count);
+        (*n)->state_values_do(this);
       }
     }
     depth--;
   }
 
-  static void basic_compute_use_count(BlockBegin* b) {
+  void block_do(BlockBegin* b) {
     depth = 0;
     // process all pinned nodes as the roots of expression trees
     for (Instruction* n = b; n != NULL; n = n->next()) {
@@ -449,18 +444,19 @@ class UseCountComputer: public AllStatic {
     assert(depth == 0, "should have counted back down");
   }
 
+  UseCountComputer() {
+    worklist = new Values();
+    depth = 0;
+  }
+
  public:
   static void compute(BlockList* blocks) {
-    worklist = new Values();
-    blocks->blocks_do(basic_compute_use_count);
-    worklist = NULL;
+    UseCountComputer ucc;
+    blocks->iterate_backward(&ucc);
   }
 };
 
 
-Values* UseCountComputer::worklist = NULL;
-int UseCountComputer::depth = 0;
-
 // helper macro for short definition of trace-output inside code
 #ifndef PRODUCT
   #define TRACE_LINEAR_SCAN(level, code)       \
@@ -1302,7 +1298,7 @@ void IR::verify() {
 
 #endif // PRODUCT
 
-void SubstitutionResolver::substitute(Value* v) {
+void SubstitutionResolver::visit(Value* v) {
   Value v0 = *v;
   if (v0) {
     Value vs = v0->subst();
@@ -1313,20 +1309,22 @@ void SubstitutionResolver::substitute(Value* v) {
 }
 
 #ifdef ASSERT
-void check_substitute(Value* v) {
-  Value v0 = *v;
-  if (v0) {
-    Value vs = v0->subst();
-    assert(vs == v0, "missed substitution");
+class SubstitutionChecker: public ValueVisitor {
+  void visit(Value* v) {
+    Value v0 = *v;
+    if (v0) {
+      Value vs = v0->subst();
+      assert(vs == v0, "missed substitution");
+    }
   }
-}
+};
 #endif
 
 
 void SubstitutionResolver::block_do(BlockBegin* block) {
   Instruction* last = NULL;
   for (Instruction* n = block; n != NULL;) {
-    n->values_do(substitute);
+    n->values_do(this);
     // need to remove this instruction from the instruction stream
     if (n->subst() != n) {
       assert(last != NULL, "must have last");
@@ -1338,8 +1336,9 @@ void SubstitutionResolver::block_do(BlockBegin* block) {
   }
 
 #ifdef ASSERT
-  if (block->state()) block->state()->values_do(check_substitute);
-  block->block_values_do(check_substitute);
-  if (block->end() && block->end()->state()) block->end()->state()->values_do(check_substitute);
+  SubstitutionChecker check_substitute;
+  if (block->state()) block->state()->values_do(&check_substitute);
+  block->block_values_do(&check_substitute);
+  if (block->end() && block->end()->state()) block->end()->state()->values_do(&check_substitute);
 #endif
 }

src/share/vm/c1/c1_IR.hpp

@@ -371,8 +371,8 @@ class IR: public CompilationResourceObj {
 // instructions from the instruction list.
 //
 
-class SubstitutionResolver: public BlockClosure {
-  static void substitute(Value* v);
+class SubstitutionResolver: public BlockClosure, ValueVisitor {
+  virtual void visit(Value* v);
 
  public:
   SubstitutionResolver(IR* hir) {

src/share/vm/c1/c1_Instruction.cpp

@@ -29,8 +29,6 @@
 // Implementation of Instruction
 
 
-int Instruction::_next_id = 0;
-
 #ifdef ASSERT
 void Instruction::create_hi_word() {
   assert(type()->is_double_word() && _hi_word == NULL, "only double word has high word");
@@ -193,22 +191,22 @@ ciType* CheckCast::exact_type() const {
 }
 
 
-void ArithmeticOp::other_values_do(void f(Value*)) {
+void ArithmeticOp::other_values_do(ValueVisitor* f) {
   if (lock_stack() != NULL) lock_stack()->values_do(f);
 }
 
-void NullCheck::other_values_do(void f(Value*)) {
+void NullCheck::other_values_do(ValueVisitor* f) {
   lock_stack()->values_do(f);
 }
 
-void AccessArray::other_values_do(void f(Value*)) {
+void AccessArray::other_values_do(ValueVisitor* f) {
   if (lock_stack() != NULL) lock_stack()->values_do(f);
 }
 
 
 // Implementation of AccessField
 
-void AccessField::other_values_do(void f(Value*)) {
+void AccessField::other_values_do(ValueVisitor* f) {
   if (state_before() != NULL) state_before()->values_do(f);
   if (lock_stack() != NULL) lock_stack()->values_do(f);
 }
@@ -270,7 +268,7 @@ bool LogicOp::is_commutative() const {
 
 // Implementation of CompareOp
 
-void CompareOp::other_values_do(void f(Value*)) {
+void CompareOp::other_values_do(ValueVisitor* f) {
   if (state_before() != NULL) state_before()->values_do(f);
 }
 
@@ -302,12 +300,12 @@ IRScope* StateSplit::scope() const {
 }
 
 
-void StateSplit::state_values_do(void f(Value*)) {
+void StateSplit::state_values_do(ValueVisitor* f) {
   if (state() != NULL) state()->values_do(f);
 }
 
 
-void BlockBegin::state_values_do(void f(Value*)) {
+void BlockBegin::state_values_do(ValueVisitor* f) {
   StateSplit::state_values_do(f);
 
   if (is_set(BlockBegin::exception_entry_flag)) {
@@ -318,13 +316,13 @@ void BlockBegin::state_values_do(void f(Value*)) {
 }
 
 
-void MonitorEnter::state_values_do(void f(Value*)) {
+void MonitorEnter::state_values_do(ValueVisitor* f) {
   StateSplit::state_values_do(f);
   _lock_stack_before->values_do(f);
 }
 
 
-void Intrinsic::state_values_do(void f(Value*)) {
+void Intrinsic::state_values_do(ValueVisitor* f) {
   StateSplit::state_values_do(f);
   if (lock_stack() != NULL) lock_stack()->values_do(f);
 }
@@ -349,8 +347,9 @@ Invoke::Invoke(Bytecodes::Code code, ValueType* result_type, Value recv, Values*
 
   assert(args != NULL, "args must exist");
 #ifdef ASSERT
-  values_do(assert_value);
-#endif // ASSERT
+  AssertValues assert_value;
+  values_do(&assert_value);
+#endif
 
   // provide an initial guess of signature size.
   _signature = new BasicTypeList(number_of_arguments() + (has_receiver() ? 1 : 0));
@@ -368,7 +367,7 @@ Invoke::Invoke(Bytecodes::Code code, ValueType* result_type, Value recv, Values*
 }
 
 
-void Invoke::state_values_do(void f(Value*)) {
+void Invoke::state_values_do(ValueVisitor* f) {
   StateSplit::state_values_do(f);
   if (state_before() != NULL) state_before()->values_do(f);
   if (state()        != NULL) state()->values_do(f);
@@ -500,30 +499,27 @@ BlockBegin* Constant::compare(Instruction::Condition cond, Value right,
 }
 
 
-void Constant::other_values_do(void f(Value*)) {
+void Constant::other_values_do(ValueVisitor* f) {
   if (state() != NULL) state()->values_do(f);
 }
 
 
 // Implementation of NewArray
 
-void NewArray::other_values_do(void f(Value*)) {
+void NewArray::other_values_do(ValueVisitor* f) {
   if (state_before() != NULL) state_before()->values_do(f);
 }
 
 
 // Implementation of TypeCheck
 
-void TypeCheck::other_values_do(void f(Value*)) {
+void TypeCheck::other_values_do(ValueVisitor* f) {
   if (state_before() != NULL) state_before()->values_do(f);
 }
 
 
 // Implementation of BlockBegin
 
-int BlockBegin::_next_block_id = 0;
-
-
 void BlockBegin::set_end(BlockEnd* end) {
   assert(end != NULL, "should not reset block end to NULL");
   BlockEnd* old_end = _end;
@@ -738,7 +734,7 @@ void BlockBegin::iterate_postorder(BlockClosure* closure) {
 }
 
 
-void BlockBegin::block_values_do(void f(Value*)) {
+void BlockBegin::block_values_do(ValueVisitor* f) {
   for (Instruction* n = this; n != NULL; n = n->next()) n->values_do(f);
 }
 
@@ -930,7 +926,7 @@ void BlockList::blocks_do(void f(BlockBegin*)) {
 }
 
 
-void BlockList::values_do(void f(Value*)) {
+void BlockList::values_do(ValueVisitor* f) {
   for (int i = length() - 1; i >= 0; i--) at(i)->block_values_do(f);
 }
 
@@ -973,7 +969,7 @@ void BlockEnd::substitute_sux(BlockBegin* old_sux, BlockBegin* new_sux) {
 }
 
 
-void BlockEnd::other_values_do(void f(Value*)) {
+void BlockEnd::other_values_do(ValueVisitor* f) {
   if (state_before() != NULL) state_before()->values_do(f);
 }
 
@@ -1012,6 +1008,6 @@ int Phi::operand_count() const {
 
 // Implementation of Throw
 
-void Throw::state_values_do(void f(Value*)) {
+void Throw::state_values_do(ValueVisitor* f) {
   BlockEnd::state_values_do(f);
 }

src/share/vm/c1/c1_LIRGenerator.cpp

@@ -304,7 +304,7 @@ void LIRGenerator::block_do_prolog(BlockBegin* block) {
   __ branch_destination(block->label());
 
   if (LIRTraceExecution &&
-      Compilation::current_compilation()->hir()->start()->block_id() != block->block_id() &&
+      Compilation::current()->hir()->start()->block_id() != block->block_id() &&
       !block->is_set(BlockBegin::exception_entry_flag)) {
     assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
     trace_block_entry(block);

src/share/vm/c1/c1_LinearScan.cpp

@@ -84,10 +84,6 @@ LinearScan::LinearScan(IR* ir, LIRGenerator* gen, FrameMap* frame_map)
  , _fpu_stack_allocator(NULL)
 #endif
 {
-  // note: to use more than on instance of LinearScan at a time this function call has to
-  //       be moved somewhere outside of this constructor:
-  Interval::initialize();
-
   assert(this->ir() != NULL,          "check if valid");
   assert(this->compilation() != NULL, "check if valid");
   assert(this->gen() != NULL,         "check if valid");
@@ -3929,8 +3925,8 @@ Range::Range(int from, int to, Range* next) :
 
 // initialize sentinel
 Range* Range::_end = NULL;
-void Range::initialize() {
-  _end = new Range(max_jint, max_jint, NULL);
+void Range::initialize(Arena* arena) {
+  _end = new (arena) Range(max_jint, max_jint, NULL);
 }
 
 int Range::intersects_at(Range* r2) const {
@@ -3976,9 +3972,9 @@ void Range::print(outputStream* out) const {
 
 // initialize sentinel
 Interval* Interval::_end = NULL;
-void Interval::initialize() {
-  Range::initialize();
-  _end = new Interval(-1);
+void Interval::initialize(Arena* arena) {
+  Range::initialize(arena);
+  _end = new (arena) Interval(-1);
 }
 
 Interval::Interval(int reg_num) :

src/share/vm/c1/c1_LinearScan.hpp

@@ -462,7 +462,7 @@ class Range : public CompilationResourceObj {
  public:
   Range(int from, int to, Range* next);
 
-  static void      initialize();
+  static void      initialize(Arena* arena);
   static Range*    end()                         { return _end; }
 
   int              from() const                  { return _from; }
@@ -529,7 +529,7 @@ class Interval : public CompilationResourceObj {
  public:
   Interval(int reg_num);
 
-  static void      initialize();
+  static void      initialize(Arena* arena);
   static Interval* end()                         { return _end; }
 
   // accessors

src/share/vm/c1/c1_Optimizer.cpp

@@ -437,11 +437,8 @@ public:
 // Because of a static contained within (for the purpose of iteration
 // over instructions), it is only valid to have one of these active at
 // a time
-class NullCheckEliminator {
+class NullCheckEliminator: public ValueVisitor {
  private:
-  static NullCheckEliminator* _static_nce;
-  static void                 do_value(Value* vp);
-
   Optimizer*        _opt;
 
   ValueSet*         _visitable_instructions;        // Visit each instruction only once per basic block
@@ -504,6 +501,8 @@ class NullCheckEliminator {
   // Process a graph
   void iterate(BlockBegin* root);
 
+  void visit(Value* f);
+
   // In some situations (like NullCheck(x); getfield(x)) the debug
   // information from the explicit NullCheck can be used to populate
   // the getfield, even if the two instructions are in different
@@ -602,14 +601,11 @@ void NullCheckVisitor::do_ProfileCall    (ProfileCall*     x) { nce()->clear_las
 void NullCheckVisitor::do_ProfileCounter (ProfileCounter*  x) {}
 
 
-NullCheckEliminator* NullCheckEliminator::_static_nce = NULL;
-
-
-void NullCheckEliminator::do_value(Value* p) {
+void NullCheckEliminator::visit(Value* p) {
   assert(*p != NULL, "should not find NULL instructions");
-  if (_static_nce->visitable(*p)) {
-    _static_nce->mark_visited(*p);
-    (*p)->visit(&_static_nce->_visitor);
+  if (visitable(*p)) {
+    mark_visited(*p);
+    (*p)->visit(&_visitor);
   }
 }
 
@@ -637,7 +633,6 @@ void NullCheckEliminator::iterate_all() {
 
 
 void NullCheckEliminator::iterate_one(BlockBegin* block) {
-  _static_nce = this;
   clear_visitable_state();
   // clear out an old explicit null checks
   set_last_explicit_null_check(NULL);
@@ -712,7 +707,7 @@ void NullCheckEliminator::iterate_one(BlockBegin* block) {
     mark_visitable(instr);
     if (instr->is_root() || instr->can_trap() || (instr->as_NullCheck() != NULL)) {
       mark_visited(instr);
-      instr->input_values_do(&NullCheckEliminator::do_value);
+      instr->input_values_do(this);
       instr->visit(&_visitor);
     }
   }

src/share/vm/c1/c1_Runtime1.cpp

@@ -60,7 +60,6 @@ void StubAssembler::set_num_rt_args(int args) {
 
 // Implementation of Runtime1
 
-bool      Runtime1::_is_initialized = false;
 CodeBlob* Runtime1::_blobs[Runtime1::number_of_ids];
 const char *Runtime1::_blob_names[] = {
   RUNTIME1_STUBS(STUB_NAME, LAST_STUB_NAME)
@@ -89,8 +88,6 @@ int Runtime1::_throw_array_store_exception_count = 0;
 int Runtime1::_throw_count = 0;
 #endif
 
-BufferBlob* Runtime1::_buffer_blob  = NULL;
-
 // Simple helper to see if the caller of a runtime stub which
 // entered the VM has been deoptimized
 
@@ -117,43 +114,14 @@ static void deopt_caller() {
 }
 
 
-BufferBlob* Runtime1::get_buffer_blob() {
-  // Allocate code buffer space only once
-  BufferBlob* blob = _buffer_blob;
-  if (blob == NULL) {
-    // setup CodeBuffer.  Preallocate a BufferBlob of size
-    // NMethodSizeLimit plus some extra space for constants.
-    int code_buffer_size = desired_max_code_buffer_size() + desired_max_constant_size();
-    blob = BufferBlob::create("Compiler1 temporary CodeBuffer",
-                              code_buffer_size);
-    guarantee(blob != NULL, "must create initial code buffer");
-    _buffer_blob = blob;
-  }
-  return _buffer_blob;
-}
-
-void Runtime1::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(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);
-}
-
-
-void Runtime1::generate_blob_for(StubID id) {
+void Runtime1::generate_blob_for(BufferBlob* buffer_blob, StubID id) {
   assert(0 <= id && id < number_of_ids, "illegal stub id");
   ResourceMark rm;
   // create code buffer for code storage
-  CodeBuffer code(get_buffer_blob()->instructions_begin(),
-                  get_buffer_blob()->instructions_size());
+  CodeBuffer code(buffer_blob->instructions_begin(),
+                  buffer_blob->instructions_size());
 
-  setup_code_buffer(&code, 0);
+  Compilation::setup_code_buffer(&code, 0);
 
   // create assembler for code generation
   StubAssembler* sasm = new StubAssembler(&code, name_for(id), id);
@@ -204,35 +172,28 @@ void Runtime1::generate_blob_for(StubID id) {
 }
 
 
-void Runtime1::initialize() {
-  // Warning: If we have more than one compilation running in parallel, we
-  //          need a lock here with the current setup (lazy initialization).
-  if (!is_initialized()) {
-    _is_initialized = true;
-
-    // platform-dependent initialization
-    initialize_pd();
-    // generate stubs
-    for (int id = 0; id < number_of_ids; id++) generate_blob_for((StubID)id);
-    // printing
+void Runtime1::initialize(BufferBlob* blob) {
+  // platform-dependent initialization
+  initialize_pd();
+  // generate stubs
+  for (int id = 0; id < number_of_ids; id++) generate_blob_for(blob, (StubID)id);
+  // printing
 #ifndef PRODUCT
-    if (PrintSimpleStubs) {
-      ResourceMark rm;
-      for (int id = 0; id < number_of_ids; id++) {
-        _blobs[id]->print();
-        if (_blobs[id]->oop_maps() != NULL) {
-          _blobs[id]->oop_maps()->print();
-        }
+  if (PrintSimpleStubs) {
+    ResourceMark rm;
+    for (int id = 0; id < number_of_ids; id++) {
+      _blobs[id]->print();
+      if (_blobs[id]->oop_maps() != NULL) {
+        _blobs[id]->oop_maps()->print();
       }
     }
-#endif
   }
+#endif
 }
 
 
 CodeBlob* Runtime1::blob_for(StubID id) {
   assert(0 <= id && id < number_of_ids, "illegal stub id");
-  if (!is_initialized()) initialize();
   return _blobs[id];
 }
 

src/share/vm/c1/c1_Runtime1.hpp

@@ -70,18 +70,6 @@ class StubAssembler;
 class Runtime1: public AllStatic {
   friend class VMStructs;
   friend class ArrayCopyStub;
- private:
-  static int desired_max_code_buffer_size() {
-    return (int) NMethodSizeLimit;  // default 256K or 512K
-  }
-  static int desired_max_constant_size() {
-    return (int) NMethodSizeLimit / 10;  // about 25K
-  }
-
-  // Note: This buffers is allocated once at startup since allocation
-  // for each compilation seems to be too expensive (at least on Intel
-  // win32).
-  static BufferBlob* _buffer_blob;
 
  public:
   enum StubID {
@@ -115,12 +103,11 @@ class Runtime1: public AllStatic {
 #endif
 
  private:
-  static bool      _is_initialized;
   static CodeBlob* _blobs[number_of_ids];
   static const char* _blob_names[];
 
   // stub generation
-  static void generate_blob_for(StubID id);
+  static void generate_blob_for(BufferBlob* blob, StubID id);
   static OopMapSet* generate_code_for(StubID id, StubAssembler* masm);
   static OopMapSet* generate_exception_throw(StubAssembler* sasm, address target, bool has_argument);
   static void generate_handle_exception(StubAssembler *sasm, OopMapSet* oop_maps, OopMap* oop_map, bool ignore_fpu_registers = false);
@@ -162,12 +149,8 @@ class Runtime1: public AllStatic {
   static void patch_code(JavaThread* thread, StubID stub_id);
 
  public:
-  static BufferBlob* get_buffer_blob();
-  static void setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);
-
   // initialization
-  static bool is_initialized()                   { return _is_initialized; }
-  static void initialize();
+  static void initialize(BufferBlob* blob);
   static void initialize_pd();
 
   // stubs

src/share/vm/c1/c1_ValueStack.cpp

@@ -119,14 +119,14 @@ void ValueStack::pin_stack_for_linear_scan() {
 
 
 // apply function to all values of a list; factored out from values_do(f)
-void ValueStack::apply(Values list, void f(Value*)) {
+void ValueStack::apply(Values list, ValueVisitor* f) {
   for (int i = 0; i < list.length(); i++) {
     Value* va = list.adr_at(i);
     Value v0 = *va;
     if (v0 != NULL) {
       if (!v0->type()->is_illegal()) {
         assert(v0->as_HiWord() == NULL, "should never see HiWord during traversal");
-        f(va);
+        f->visit(va);
 #ifdef ASSERT
         Value v1 = *va;
         if (v0 != v1) {
@@ -143,7 +143,7 @@ void ValueStack::apply(Values list, void f(Value*)) {
 }
 
 
-void ValueStack::values_do(void f(Value*)) {
+void ValueStack::values_do(ValueVisitor* f) {
   apply(_stack, f);
   apply(_locks, f);
 

src/share/vm/c1/c1_ValueStack.hpp

@@ -41,7 +41,7 @@ class ValueStack: public CompilationResourceObj {
   }
 
   // helper routine
-  static void apply(Values list, void f(Value*));
+  static void apply(Values list, ValueVisitor* f);
 
  public:
   // creation
@@ -143,7 +143,7 @@ class ValueStack: public CompilationResourceObj {
   void pin_stack_for_linear_scan();
 
   // iteration
-  void values_do(void f(Value*));
+  void values_do(ValueVisitor* f);
 
   // untyped manipulation (for dup_x1, etc.)
   void clear_stack()                             { _stack.clear(); }

src/share/vm/c1/c1_ValueType.cpp

@@ -46,27 +46,26 @@ IntConstant*    intOne       = NULL;
 ObjectConstant* objectNull   = NULL;
 
 
-void ValueType::initialize() {
+void ValueType::initialize(Arena* arena) {
   // Note: Must initialize all types for each compilation
   //       as they are allocated within a ResourceMark!
 
   // types
-  voidType     = new VoidType();
-  intType      = new IntType();
-  longType     = new LongType();
-  floatType    = new FloatType();
-  doubleType   = new DoubleType();
-  objectType   = new ObjectType();
-  arrayType    = new ArrayType();
-  instanceType = new InstanceType();
-  classType    = new ClassType();
-  addressType  = new AddressType();
-  illegalType  = new IllegalType();
-
-  // constants
-  intZero     = new IntConstant(0);
-  intOne      = new IntConstant(1);
-  objectNull  = new ObjectConstant(ciNullObject::make());
+  voidType     = new (arena) VoidType();
+  intType      = new (arena) IntType();
+  longType     = new (arena) LongType();
+  floatType    = new (arena) FloatType();
+  doubleType   = new (arena) DoubleType();
+  objectType   = new (arena) ObjectType();
+  arrayType    = new (arena) ArrayType();
+  instanceType = new (arena) InstanceType();
+  classType    = new (arena) ClassType();
+  addressType  = new (arena) AddressType();
+  illegalType  = new (arena) IllegalType();
+
+  intZero     = new (arena) IntConstant(0);
+  intOne      = new (arena) IntConstant(1);
+  objectNull  = new (arena) ObjectConstant(ciNullObject::make());
 };
 
 

src/share/vm/c1/c1_ValueType.hpp

@@ -94,7 +94,7 @@ class ValueType: public CompilationResourceObj {
 
  public:
   // initialization
-  static void initialize();
+  static void initialize(Arena* arena);
 
   // accessors
   virtual ValueType* base() const                = 0; // the 'canonical' type (e.g., intType for an IntConstant)

src/share/vm/includeDB_compiler1

@@ -71,8 +71,8 @@ c1_Compilation.cpp                      c1_LinearScan.hpp
 c1_Compilation.cpp                      c1_MacroAssembler.hpp
 c1_Compilation.cpp                      c1_ValueMap.hpp
 c1_Compilation.cpp                      c1_ValueStack.hpp
-c1_Compilation.cpp                      ciEnv.hpp
 c1_Compilation.cpp                      debugInfoRec.hpp
+c1_Compilation.hpp                      ciEnv.hpp
 c1_Compilation.hpp                      exceptionHandlerTable.hpp
 c1_Compilation.hpp                      resourceArea.hpp
 
@@ -82,6 +82,8 @@ c1_Compiler.cpp                         arguments.hpp
 c1_Compiler.cpp                         c1_Compilation.hpp
 c1_Compiler.cpp                         c1_Compiler.hpp
 c1_Compiler.cpp                         c1_FrameMap.hpp
+c1_Compiler.cpp                         c1_GraphBuilder.hpp
+c1_Compiler.cpp                         c1_LinearScan.hpp
 c1_Compiler.cpp                         c1_MacroAssembler.hpp
 c1_Compiler.cpp                         c1_Runtime1.hpp
 c1_Compiler.cpp                         c1_ValueType.hpp

src/share/vm/opto/superword.cpp

 /*
- * Copyright (c) 2007, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -514,6 +514,13 @@ bool SuperWord::exists_at(Node* s, uint pos) {
 bool SuperWord::are_adjacent_refs(Node* s1, Node* s2) {
   if (!s1->is_Mem() || !s2->is_Mem()) return false;
   if (!in_bb(s1)    || !in_bb(s2))    return false;
+
+  // Do not use superword for non-primitives
+  if (!is_java_primitive(s1->as_Mem()->memory_type()) ||
+      !is_java_primitive(s2->as_Mem()->memory_type())) {
+    return false;
+  }
+
   // FIXME - co_locate_pack fails on Stores in different mem-slices, so
   // only pack memops that are in the same alias set until that's fixed.
   if (_phase->C->get_alias_index(s1->as_Mem()->adr_type()) !=

src/share/vm/runtime/mutexLocker.cpp

@@ -82,9 +82,6 @@ Mutex*   EvacFailureStack_lock        = NULL;
 Mutex*   DerivedPointerTableGC_lock   = NULL;
 Mutex*   Compile_lock                 = NULL;
 Monitor* MethodCompileQueue_lock      = NULL;
-#ifdef TIERED
-Monitor* C1_lock                      = NULL;
-#endif // TIERED
 Monitor* CompileThread_lock           = NULL;
 Mutex*   CompileTaskAlloc_lock        = NULL;
 Mutex*   CompileStatistics_lock       = NULL;
@@ -255,11 +252,6 @@ void mutex_init() {
   def(Debug3_lock                  , Mutex  , nonleaf+4,   true );
   def(ProfileVM_lock               , Monitor, nonleaf+4,   false); // used for profiling of the VMThread
   def(CompileThread_lock           , Monitor, nonleaf+5,   false );
-#ifdef TIERED
-  def(C1_lock                      , Monitor, nonleaf+5,   false );
-#endif // TIERED
-
-
 }
 
 GCMutexLocker::GCMutexLocker(Monitor * mutex) {

src/share/vm/runtime/mutexLocker.hpp

@@ -84,9 +84,6 @@ extern Mutex*   ParGCRareEvent_lock;             // Synchronizes various (rare)
 extern Mutex*   EvacFailureStack_lock;           // guards the evac failure scan stack
 extern Mutex*   Compile_lock;                    // a lock held when Compilation is updating code (used to block CodeCache traversal, CHA updates, etc)
 extern Monitor* MethodCompileQueue_lock;         // a lock held when method compilations are enqueued, dequeued
-#ifdef TIERED
-extern Monitor* C1_lock;                         // a lock to ensure on single c1 compile is ever active
-#endif // TIERED
 extern Monitor* CompileThread_lock;              // a lock held by compile threads during compilation system initialization
 extern Mutex*   CompileTaskAlloc_lock;           // a lock held when CompileTasks are allocated
 extern Mutex*   CompileStatistics_lock;          // a lock held when updating compilation statistics

src/share/vm/runtime/thread.cpp

@@ -2799,6 +2799,7 @@ CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters)
   _task  = NULL;
   _queue = queue;
   _counters = counters;
+  _buffer_blob = NULL;
 
 #ifndef PRODUCT
   _ideal_graph_printer = NULL;

src/share/vm/runtime/thread.hpp

@@ -1577,6 +1577,7 @@ class CompilerThread : public JavaThread {
   CompileLog*   _log;
   CompileTask*  _task;
   CompileQueue* _queue;
+  BufferBlob*   _buffer_blob;
 
  public:
 
@@ -1595,6 +1596,9 @@ class CompilerThread : public JavaThread {
   ciEnv*        env()                            { return _env; }
   void          set_env(ciEnv* env)              { _env = env; }
 
+  BufferBlob*   get_buffer_blob()                { return _buffer_blob; }
+  void          set_buffer_blob(BufferBlob* b)   { _buffer_blob = b; };
+
   // Get/set the thread's logging information
   CompileLog*   log()                            { return _log; }
   void          init_log(CompileLog* log) {

test/compiler/6958485/Test.java

+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 6958485
+ * @summary fix for 6879921 was insufficient
+ *
+ * @run main/othervm -Xbatch -XX:CompileOnly=Test.init Test
+ */
+
+public class Test {
+
+    public static void init(Object src[], boolean[] dst) {
+        // initialize the arrays
+        for (int i =0; i<src.length; i++) {
+            dst[i] = src[i] != null ? false : true;
+        }
+    }
+
+    public static void test() {
+        Object[] src = new Object[34];
+        boolean[] dst = new boolean[34];
+
+        init(src, dst);
+    }
+
+    public static void main(String[] args) {
+        for (int i=0; i< 2000; i++) {
+            test();
+        }
+    }
+}