Line data    Source code

       1             : // Copyright 2012 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_CODEGEN_H_
       6             : #define V8_CODEGEN_H_
       7             : 
       8             : #include "src/code-stubs.h"
       9             : #include "src/globals.h"
      10             : #include "src/runtime/runtime.h"
      11             : 
      12             : // Include the declaration of the architecture defined class CodeGenerator.
      13             : // The contract  to the shared code is that the the CodeGenerator is a subclass
      14             : // of Visitor and that the following methods are available publicly:
      15             : //   MakeCode
      16             : //   MakeCodePrologue
      17             : //   MakeCodeEpilogue
      18             : //   masm
      19             : //   frame
      20             : //   script
      21             : //   has_valid_frame
      22             : //   SetFrame
      23             : //   DeleteFrame
      24             : //   allocator
      25             : //   AddDeferred
      26             : //   in_spilled_code
      27             : //   set_in_spilled_code
      28             : //   RecordPositions
      29             : //
      30             : // These methods are either used privately by the shared code or implemented as
      31             : // shared code:
      32             : //   CodeGenerator
      33             : //   ~CodeGenerator
      34             : //   Generate
      35             : //   ComputeLazyCompile
      36             : //   ProcessDeclarations
      37             : //   DeclareGlobals
      38             : //   CheckForInlineRuntimeCall
      39             : //   AnalyzeCondition
      40             : //   CodeForFunctionPosition
      41             : //   CodeForReturnPosition
      42             : //   CodeForStatementPosition
      43             : //   CodeForDoWhileConditionPosition
      44             : //   CodeForSourcePosition
      45             : 
      46             : #if V8_TARGET_ARCH_IA32
      47             : #include "src/ia32/codegen-ia32.h"  // NOLINT
      48             : #elif V8_TARGET_ARCH_X64
      49             : #include "src/x64/codegen-x64.h"  // NOLINT
      50             : #elif V8_TARGET_ARCH_ARM64
      51             : #include "src/arm64/codegen-arm64.h"  // NOLINT
      52             : #elif V8_TARGET_ARCH_ARM
      53             : #include "src/arm/codegen-arm.h"  // NOLINT
      54             : #elif V8_TARGET_ARCH_PPC
      55             : #include "src/ppc/codegen-ppc.h"  // NOLINT
      56             : #elif V8_TARGET_ARCH_MIPS
      57             : #include "src/mips/codegen-mips.h"  // NOLINT
      58             : #elif V8_TARGET_ARCH_MIPS64
      59             : #include "src/mips64/codegen-mips64.h"  // NOLINT
      60             : #elif V8_TARGET_ARCH_S390
      61             : #include "src/s390/codegen-s390.h"  // NOLINT
      62             : #elif V8_TARGET_ARCH_X87
      63             : #include "src/x87/codegen-x87.h"  // NOLINT
      64             : #else
      65             : #error Unsupported target architecture.
      66             : #endif
      67             : 
      68             : namespace v8 {
      69             : namespace internal {
      70             : 
      71             : 
      72             : class CompilationInfo;
      73             : class EhFrameWriter;
      74             : 
      75             : class CodeGenerator {
      76             :  public:
      77             :   // Printing of AST, etc. as requested by flags.
      78             :   static void MakeCodePrologue(CompilationInfo* info, const char* kind);
      79             : 
      80             :   // Allocate and install the code.
      81             :   static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm,
      82             :                                        EhFrameWriter* unwinding,
      83             :                                        CompilationInfo* info,
      84             :                                        Handle<Object> self_reference);
      85             : 
      86             :   // Print the code after compiling it.
      87             :   static void PrintCode(Handle<Code> code, CompilationInfo* info);
      88             : 
      89             :  private:
      90             :   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
      91             : };
      92             : 
      93             : 
      94             : // Results of the library implementation of transcendental functions may differ
      95             : // from the one we use in our generated code.  Therefore we use the same
      96             : // generated code both in runtime and compiled code.
      97             : typedef double (*UnaryMathFunctionWithIsolate)(double x, Isolate* isolate);
      98             : 
      99             : UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate);
     100             : 
     101             : V8_EXPORT_PRIVATE double modulo(double x, double y);
     102             : 
     103             : // Custom implementation of math functions.
     104             : double fast_sqrt(double input, Isolate* isolate);
     105             : void lazily_initialize_fast_sqrt(Isolate* isolate);
     106             : 
     107             : class CodeAgingHelper {
     108             :  public:
     109             :   explicit CodeAgingHelper(Isolate* isolate);
     110             : 
     111     1667487 :   uint32_t young_sequence_length() const { return young_sequence_.length(); }
     112             :   bool IsYoung(byte* candidate) const {
     113             :     return memcmp(candidate,
     114             :                   young_sequence_.start(),
     115     6303174 :                   young_sequence_.length()) == 0;
     116             :   }
     117             :   void CopyYoungSequenceTo(byte* new_buffer) const {
     118      656451 :     CopyBytes(new_buffer, young_sequence_.start(), young_sequence_.length());
     119             :   }
     120             : 
     121             : #ifdef DEBUG
     122             :   bool IsOld(byte* candidate) const;
     123             : #endif
     124             : 
     125             :  protected:
     126             :   const EmbeddedVector<byte, kNoCodeAgeSequenceLength> young_sequence_;
     127             : #ifdef DEBUG
     128             : #ifdef V8_TARGET_ARCH_ARM64
     129             :   const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_;
     130             : #endif
     131             : #endif
     132             : };
     133             : 
     134             : }  // namespace internal
     135             : }  // namespace v8
     136             : 
     137             : #endif  // V8_CODEGEN_H_