jdk8-mips64-public/hotspot: src/share/vm/c1/c1_Compilation.hpp@42a10fc37986 (annotated)

src/share/vm/c1/c1_Compilation.hpp@42a10fc37986 (annotated)

src/share/vm/c1/c1_Compilation.hpp

Fri, 15 Oct 2010 09:38:20 +0200

author: roland
date: Fri, 15 Oct 2010 09:38:20 +0200
changeset 2254: 42a10fc37986
parent 2174: f02a8bbe6ed4
child 2314: f95d63e2154a
permissions: -rw-r--r--

6991577: add IfOp optimization to C1
Summary: Ifop optimization for c1
Reviewed-by: never, phh, iveresov

 /*
  * Copyright (c) 1999, 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.
  *
  */
 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;
   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;
   // 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; }
   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; }
   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; }
   // 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; }
   // 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 void 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;
   }
 };
 // 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; }
 };

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src/share/vm/c1/c1_Compilation.hpp@42a10fc37986 (annotated)

src/share/vm/c1/c1_Compilation.hpp