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/runtime/runtime.h" 10 11 // Include the declaration of the architecture defined class CodeGenerator. 12 // The contract to the shared code is that the the CodeGenerator is a subclass 13 // of Visitor and that the following methods are available publicly: 14 // MakeCode 15 // MakeCodePrologue 16 // MakeCodeEpilogue 17 // masm 18 // frame 19 // script 20 // has_valid_frame 21 // SetFrame 22 // DeleteFrame 23 // allocator 24 // AddDeferred 25 // in_spilled_code 26 // set_in_spilled_code 27 // RecordPositions 28 // 29 // These methods are either used privately by the shared code or implemented as 30 // shared code: 31 // CodeGenerator 32 // ~CodeGenerator 33 // Generate 34 // ComputeLazyCompile 35 // ProcessDeclarations 36 // DeclareGlobals 37 // CheckForInlineRuntimeCall 38 // AnalyzeCondition 39 // CodeForFunctionPosition 40 // CodeForReturnPosition 41 // CodeForStatementPosition 42 // CodeForDoWhileConditionPosition 43 // CodeForSourcePosition 44 45 #if V8_TARGET_ARCH_IA32 46 #include "src/ia32/codegen-ia32.h" // NOLINT 47 #elif V8_TARGET_ARCH_X64 48 #include "src/x64/codegen-x64.h" // NOLINT 49 #elif V8_TARGET_ARCH_ARM64 50 #include "src/arm64/codegen-arm64.h" // NOLINT 51 #elif V8_TARGET_ARCH_ARM 52 #include "src/arm/codegen-arm.h" // NOLINT 53 #elif V8_TARGET_ARCH_PPC 54 #include "src/ppc/codegen-ppc.h" // NOLINT 55 #elif V8_TARGET_ARCH_MIPS 56 #include "src/mips/codegen-mips.h" // NOLINT 57 #elif V8_TARGET_ARCH_MIPS64 58 #include "src/mips64/codegen-mips64.h" // NOLINT 59 #elif V8_TARGET_ARCH_S390 60 #include "src/s390/codegen-s390.h" // NOLINT 61 #elif V8_TARGET_ARCH_X87 62 #include "src/x87/codegen-x87.h" // NOLINT 63 #else 64 #error Unsupported target architecture. 65 #endif 66 67 namespace v8 { 68 namespace internal { 69 70 71 class CompilationInfo; 72 73 74 class CodeGenerator { 75 public: 76 // Printing of AST, etc. as requested by flags. 77 static void MakeCodePrologue(CompilationInfo* info, const char* kind); 78 79 // Allocate and install the code. 80 static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm, 81 CompilationInfo* info); 82 83 // Print the code after compiling it. 84 static void PrintCode(Handle<Code> code, CompilationInfo* info); 85 86 private: 87 DISALLOW_COPY_AND_ASSIGN(CodeGenerator); 88 }; 89 90 91 // Results of the library implementation of transcendental functions may differ 92 // from the one we use in our generated code. Therefore we use the same 93 // generated code both in runtime and compiled code. 94 typedef double (*UnaryMathFunctionWithIsolate)(double x, Isolate* isolate); 95 96 UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate); 97 98 99 double modulo(double x, double y); 100 101 // Custom implementation of math functions. 102 double fast_sqrt(double input, Isolate* isolate); 103 void lazily_initialize_fast_sqrt(Isolate* isolate); 104 105 106 class ElementsTransitionGenerator : public AllStatic { 107 public: 108 // If |mode| is set to DONT_TRACK_ALLOCATION_SITE, 109 // |allocation_memento_found| may be NULL. 110 static void GenerateMapChangeElementsTransition( 111 MacroAssembler* masm, 112 Register receiver, 113 Register key, 114 Register value, 115 Register target_map, 116 AllocationSiteMode mode, 117 Label* allocation_memento_found); 118 static void GenerateSmiToDouble( 119 MacroAssembler* masm, 120 Register receiver, 121 Register key, 122 Register value, 123 Register target_map, 124 AllocationSiteMode mode, 125 Label* fail); 126 static void GenerateDoubleToObject( 127 MacroAssembler* masm, 128 Register receiver, 129 Register key, 130 Register value, 131 Register target_map, 132 AllocationSiteMode mode, 133 Label* fail); 134 135 private: 136 DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator); 137 }; 138 139 static const int kNumberDictionaryProbes = 4; 140 141 142 class CodeAgingHelper { 143 public: 144 explicit CodeAgingHelper(Isolate* isolate); 145 young_sequence_length()146 uint32_t young_sequence_length() const { return young_sequence_.length(); } IsYoung(byte * candidate)147 bool IsYoung(byte* candidate) const { 148 return memcmp(candidate, 149 young_sequence_.start(), 150 young_sequence_.length()) == 0; 151 } CopyYoungSequenceTo(byte * new_buffer)152 void CopyYoungSequenceTo(byte* new_buffer) const { 153 CopyBytes(new_buffer, young_sequence_.start(), young_sequence_.length()); 154 } 155 156 #ifdef DEBUG 157 bool IsOld(byte* candidate) const; 158 #endif 159 160 protected: 161 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> young_sequence_; 162 #ifdef DEBUG 163 #ifdef V8_TARGET_ARCH_ARM64 164 const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_; 165 #endif 166 #endif 167 }; 168 169 } // namespace internal 170 } // namespace v8 171 172 #endif // V8_CODEGEN_H_ 173