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 /*

  * Copyright (c) 1999, 2012, 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.

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  */

 #ifndef SHARE_VM_C1_C1_COMPILATION_HPP

 #define SHARE_VM_C1_C1_COMPILATION_HPP

 #include "ci/ciEnv.hpp"

 #include "ci/ciMethodData.hpp"

 #include "code/exceptionHandlerTable.hpp"

 #include "memory/resourceArea.hpp"

 #include "runtime/deoptimization.hpp"

 class CompilationResourceObj;

 class XHandlers;

 class ExceptionInfo;

 class DebugInformationRecorder;

 class FrameMap;

 class IR;

 class IRScope;

 class Instruction;

 class LinearScan;

 class OopMap;

 class LIR_Emitter;

 class LIR_Assembler;

 class CodeEmitInfo;

 class ciEnv;

 class ciMethod;

 class ValueStack;

 class LIR_OprDesc;

 class C1_MacroAssembler;

 class CFGPrinter;

 typedef LIR_OprDesc* LIR_Opr;

 define_array(BasicTypeArray, BasicType)

 define_stack(BasicTypeList, BasicTypeArray)

 define_array(ExceptionInfoArray, ExceptionInfo*)

 define_stack(ExceptionInfoList,  ExceptionInfoArray)

 class Compilation: public StackObj {

   friend class CompilationResourceObj;

  private:

   // compilation specifics

   Arena* _arena;

   int _next_id;

   int _next_block_id;

   AbstractCompiler*  _compiler;

   ciEnv*             _env;

   CompileLog*        _log;

   ciMethod*          _method;

   int                _osr_bci;

   IR*                _hir;

   int                _max_spills;

   FrameMap*          _frame_map;

   C1_MacroAssembler* _masm;

   bool               _has_exception_handlers;

   bool               _has_fpu_code;

   bool               _has_unsafe_access;

   bool               _would_profile;

   bool               _has_method_handle_invokes;  // True if this method has MethodHandle invokes.

   const char*        _bailout_msg;

   ExceptionInfoList* _exception_info_list;

   ExceptionHandlerTable _exception_handler_table;

   ImplicitExceptionTable _implicit_exception_table;

   LinearScan*        _allocator;

   CodeOffsets        _offsets;

   CodeBuffer         _code;

   bool               _has_access_indexed;

   // compilation helpers

   void initialize();

   void build_hir();

   void emit_lir();

   void emit_code_epilog(LIR_Assembler* assembler);

   int  emit_code_body();

   int  compile_java_method();

   void install_code(int frame_size);

   void compile_method();

   void generate_exception_handler_table();

   ExceptionInfoList* exception_info_list() const { return _exception_info_list; }

   ExceptionHandlerTable* exception_handler_table() { return &_exception_handler_table; }

   LinearScan* allocator()                          { return _allocator;      }

   void        set_allocator(LinearScan* allocator) { _allocator = allocator; }

   Instruction*       _current_instruction;       // the instruction currently being processed

 #ifndef PRODUCT

   Instruction*       _last_instruction_printed;  // the last instruction printed during traversal

 #endif // PRODUCT

  public:

   // creation

   Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,

               int osr_bci, BufferBlob* buffer_blob);

   ~Compilation();

   static Compilation* current() {

     return (Compilation*) ciEnv::current()->compiler_data();

   }

   // accessors

   ciEnv* env() const                             { return _env; }

   CompileLog* log() const                        { return _log; }

   AbstractCompiler* compiler() const             { return _compiler; }

   bool has_exception_handlers() const            { return _has_exception_handlers; }

   bool has_fpu_code() const                      { return _has_fpu_code; }

   bool has_unsafe_access() const                 { return _has_unsafe_access; }

   int max_vector_size() const                    { return 0; }

   ciMethod* method() const                       { return _method; }

   int osr_bci() const                            { return _osr_bci; }

   bool is_osr_compile() const                    { return osr_bci() >= 0; }

   IR* hir() const                                { return _hir; }

   int max_spills() const                         { return _max_spills; }

   FrameMap* frame_map() const                    { return _frame_map; }

   CodeBuffer* code()                             { return &_code; }

   C1_MacroAssembler* masm() const                { return _masm; }

   CodeOffsets* offsets()                         { return &_offsets; }

   Arena* arena()                                 { return _arena; }

   bool has_access_indexed()                      { return _has_access_indexed; }

   // 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; }

   void set_has_fpu_code(bool f)                  { _has_fpu_code = f; }

   void set_has_unsafe_access(bool f)             { _has_unsafe_access = f; }

   void set_would_profile(bool f)                 { _would_profile = f; }

   void set_has_access_indexed(bool f)            { _has_access_indexed = f; }

   // Add a set of exception handlers covering the given PC offset

   void add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers);

   // Statistics gathering

   void notice_inlined_method(ciMethod* method);

   // JSR 292

   bool     has_method_handle_invokes() const { return _has_method_handle_invokes;     }

   void set_has_method_handle_invokes(bool z) {        _has_method_handle_invokes = z; }

   DebugInformationRecorder* debug_info_recorder() const; // = _env->debug_info();

   Dependencies* dependency_recorder() const; // = _env->dependencies()

   ImplicitExceptionTable* implicit_exception_table()     { return &_implicit_exception_table; }

   Instruction* current_instruction() const       { return _current_instruction; }

   Instruction* set_current_instruction(Instruction* instr) {

     Instruction* previous = _current_instruction;

     _current_instruction = instr;

     return previous;

   }

 #ifndef PRODUCT

   void maybe_print_current_instruction();

 #endif // PRODUCT

   // error handling

   void bailout(const char* msg);

   bool bailed_out() const                        { return _bailout_msg != NULL; }

   const char* bailout_msg() const                { return _bailout_msg; }

   static int desired_max_code_buffer_size() {

 #ifndef PPC

     return (int) NMethodSizeLimit;  // default 256K or 512K

 #else

     // conditional branches on PPC are restricted to 16 bit signed

     return MIN2((unsigned int)NMethodSizeLimit,32*K);

 #endif

   }

   static int desired_max_constant_size() {

     return desired_max_code_buffer_size() / 10;

   }

   static bool setup_code_buffer(CodeBuffer* cb, int call_stub_estimate);

   // timers

   static void print_timers();

 #ifndef PRODUCT

   // debugging support.

   // produces a file named c1compileonly in the current directory with

   // directives to compile only the current method and it's inlines.

   // The file can be passed to the command line option -XX:Flags=<filename>

   void compile_only_this_method();

   void compile_only_this_scope(outputStream* st, IRScope* scope);

   void exclude_this_method();

 #endif // PRODUCT

   bool is_profiling() {

     return env()->comp_level() == CompLevel_full_profile ||

            env()->comp_level() == CompLevel_limited_profile;

   }

   bool count_invocations() { return is_profiling(); }

   bool count_backedges()   { return is_profiling(); }

   // Helpers for generation of profile information

   bool profile_branches() {

     return env()->comp_level() == CompLevel_full_profile &&

       C1UpdateMethodData && C1ProfileBranches;

   }

   bool profile_calls() {

     return env()->comp_level() == CompLevel_full_profile &&

       C1UpdateMethodData && C1ProfileCalls;

   }

   bool profile_inlined_calls() {

     return profile_calls() && C1ProfileInlinedCalls;

   }

   bool profile_checkcasts() {

     return env()->comp_level() == CompLevel_full_profile &&

       C1UpdateMethodData && C1ProfileCheckcasts;

   }

   // will compilation make optimistic assumptions that might lead to

   // deoptimization and that the runtime will account for?

   bool is_optimistic() const                             {

     return !TieredCompilation &&

       (RangeCheckElimination || UseLoopInvariantCodeMotion) &&

       method()->method_data()->trap_count(Deoptimization::Reason_none) == 0;

   }

 };

 // Macro definitions for unified bailout-support

 // The methods bailout() and bailed_out() are present in all classes

 // that might bailout, but forward all calls to Compilation

 #define BAILOUT(msg)               { bailout(msg); return;              }

 #define BAILOUT_(msg, res)         { bailout(msg); return res;          }

 #define CHECK_BAILOUT()            { if (bailed_out()) return;          }

 #define CHECK_BAILOUT_(res)        { if (bailed_out()) return res;      }

 class InstructionMark: public StackObj {

  private:

   Compilation* _compilation;

   Instruction*  _previous;

  public:

   InstructionMark(Compilation* compilation, Instruction* instr) {

     _compilation = compilation;

     _previous = _compilation->set_current_instruction(instr);

   }

   ~InstructionMark() {

     _compilation->set_current_instruction(_previous);

   }

 };

 //----------------------------------------------------------------------

 // 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::current()->arena()->Amalloc(size); }

   void* operator new(size_t size, Arena* arena) {

     return arena->Amalloc(size);

   }

   void  operator delete(void* p) {} // nothing to do

 };

 //----------------------------------------------------------------------

 // Class for aggregating exception handler information.

 // Effectively extends XHandlers class with PC offset of

 // potentially exception-throwing instruction.

 // This class is used at the end of the compilation to build the

 // ExceptionHandlerTable.

 class ExceptionInfo: public CompilationResourceObj {

  private:

   int             _pco;                // PC of potentially exception-throwing instruction

   XHandlers*      _exception_handlers; // flat list of exception handlers covering this PC

  public:

   ExceptionInfo(int pco, XHandlers* exception_handlers)

     : _pco(pco)

     , _exception_handlers(exception_handlers)

   { }

   int pco()                                      { return _pco; }

   XHandlers* exception_handlers()                { return _exception_handlers; }

 };

 #endif // SHARE_VM_C1_C1_COMPILATION_HPP