1 // Copyright 2010 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #ifndef V8_FAST_CODEGEN_H_ 29 #define V8_FAST_CODEGEN_H_ 30 31 #if V8_TARGET_ARCH_IA32 32 #include "ia32/fast-codegen-ia32.h" 33 #else 34 35 #include "v8.h" 36 37 #include "ast.h" 38 #include "compiler.h" 39 #include "list.h" 40 41 namespace v8 { 42 namespace internal { 43 44 class FastCodeGenSyntaxChecker: public AstVisitor { 45 public: FastCodeGenSyntaxChecker()46 explicit FastCodeGenSyntaxChecker() 47 : info_(NULL), has_supported_syntax_(true) { 48 } 49 50 void Check(CompilationInfo* info); 51 info()52 CompilationInfo* info() { return info_; } has_supported_syntax()53 bool has_supported_syntax() { return has_supported_syntax_; } 54 55 private: 56 void VisitDeclarations(ZoneList<Declaration*>* decls); 57 void VisitStatements(ZoneList<Statement*>* stmts); 58 59 // AST node visit functions. 60 #define DECLARE_VISIT(type) virtual void Visit##type(type* node); 61 AST_NODE_LIST(DECLARE_VISIT) 62 #undef DECLARE_VISIT 63 64 CompilationInfo* info_; 65 bool has_supported_syntax_; 66 67 DISALLOW_COPY_AND_ASSIGN(FastCodeGenSyntaxChecker); 68 }; 69 70 71 class FastCodeGenerator: public AstVisitor { 72 public: FastCodeGenerator(MacroAssembler * masm)73 explicit FastCodeGenerator(MacroAssembler* masm) 74 : masm_(masm), info_(NULL), destination_(no_reg), smi_bits_(0) { 75 } 76 77 static Handle<Code> MakeCode(CompilationInfo* info); 78 79 void Generate(CompilationInfo* compilation_info); 80 81 private: masm()82 MacroAssembler* masm() { return masm_; } info()83 CompilationInfo* info() { return info_; } 84 destination()85 Register destination() { return destination_; } set_destination(Register reg)86 void set_destination(Register reg) { destination_ = reg; } 87 function()88 FunctionLiteral* function() { return info_->function(); } scope()89 Scope* scope() { return info_->scope(); } 90 91 // Platform-specific fixed registers, all guaranteed distinct. 92 Register accumulator0(); 93 Register accumulator1(); 94 Register scratch0(); 95 Register scratch1(); 96 Register receiver_reg(); 97 Register context_reg(); 98 other_accumulator(Register reg)99 Register other_accumulator(Register reg) { 100 ASSERT(reg.is(accumulator0()) || reg.is(accumulator1())); 101 return (reg.is(accumulator0())) ? accumulator1() : accumulator0(); 102 } 103 104 // Flags are true if the respective register is statically known to hold a 105 // smi. We do not track every register, only the accumulator registers. is_smi(Register reg)106 bool is_smi(Register reg) { 107 ASSERT(!reg.is(no_reg)); 108 return (smi_bits_ & reg.bit()) != 0; 109 } set_as_smi(Register reg)110 void set_as_smi(Register reg) { 111 ASSERT(!reg.is(no_reg)); 112 smi_bits_ = smi_bits_ | reg.bit(); 113 } clear_as_smi(Register reg)114 void clear_as_smi(Register reg) { 115 ASSERT(!reg.is(no_reg)); 116 smi_bits_ = smi_bits_ & ~reg.bit(); 117 } 118 119 // AST node visit functions. 120 #define DECLARE_VISIT(type) virtual void Visit##type(type* node); 121 AST_NODE_LIST(DECLARE_VISIT) 122 #undef DECLARE_VISIT 123 124 // Emit code to load the receiver from the stack into receiver_reg. 125 void EmitLoadReceiver(); 126 127 // Emit code to load a global variable directly from a global property 128 // cell into the destination register. 129 void EmitGlobalVariableLoad(Handle<Object> cell); 130 131 // Emit a store to an own property of this. The stored value is expected 132 // in accumulator0 and the receiver in receiver_reg. The receiver 133 // register is preserved and the result (the stored value) is left in the 134 // destination register. 135 void EmitThisPropertyStore(Handle<String> name); 136 137 // Emit a load from an own property of this. The receiver is expected in 138 // receiver_reg. The receiver register is preserved and the result is 139 // left in the destination register. 140 void EmitThisPropertyLoad(Handle<String> name); 141 142 // Emit a bitwise or operation. The left operand is in accumulator1 and 143 // the right is in accumulator0. The result should be left in the 144 // destination register. 145 void EmitBitOr(); 146 147 MacroAssembler* masm_; 148 CompilationInfo* info_; 149 Register destination_; 150 uint32_t smi_bits_; 151 152 DISALLOW_COPY_AND_ASSIGN(FastCodeGenerator); 153 }; 154 155 156 } } // namespace v8::internal 157 158 #endif // V8_TARGET_ARCH_IA32 159 160 #endif // V8_FAST_CODEGEN_H_ 161