| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_CODEGEN_H_ |
| #define V8_CODEGEN_H_ |
| |
| #include "ast.h" |
| #include "code-stubs.h" |
| #include "runtime.h" |
| |
| // Include the declaration of the architecture defined class CodeGenerator. |
| // The contract to the shared code is that the the CodeGenerator is a subclass |
| // of Visitor and that the following methods are available publicly: |
| // MakeCode |
| // SetFunctionInfo |
| // masm |
| // frame |
| // has_valid_frame |
| // SetFrame |
| // DeleteFrame |
| // allocator |
| // AddDeferred |
| // in_spilled_code |
| // set_in_spilled_code |
| // |
| // These methods are either used privately by the shared code or implemented as |
| // shared code: |
| // CodeGenerator |
| // ~CodeGenerator |
| // ProcessDeferred |
| // GenCode |
| // BuildBoilerplate |
| // ComputeCallInitialize |
| // ComputeCallInitializeInLoop |
| // ProcessDeclarations |
| // DeclareGlobals |
| // FindInlineRuntimeLUT |
| // CheckForInlineRuntimeCall |
| // PatchInlineRuntimeEntry |
| // GenerateFastCaseSwitchStatement |
| // GenerateFastCaseSwitchCases |
| // TryGenerateFastCaseSwitchStatement |
| // GenerateFastCaseSwitchJumpTable |
| // FastCaseSwitchMinCaseCount |
| // FastCaseSwitchMaxOverheadFactor |
| // CodeForFunctionPosition |
| // CodeForReturnPosition |
| // CodeForStatementPosition |
| // CodeForSourcePosition |
| |
| |
| // Mode to overwrite BinaryExpression values. |
| enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT }; |
| |
| |
| #if V8_TARGET_ARCH_IA32 |
| #include "ia32/codegen-ia32.h" |
| #elif V8_TARGET_ARCH_X64 |
| #include "x64/codegen-x64.h" |
| #elif V8_TARGET_ARCH_ARM |
| #include "arm/codegen-arm.h" |
| #endif |
| |
| #include "register-allocator.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Code generation can be nested. Code generation scopes form a stack |
| // of active code generators. |
| class CodeGeneratorScope BASE_EMBEDDED { |
| public: |
| explicit CodeGeneratorScope(CodeGenerator* cgen) { |
| previous_ = top_; |
| top_ = cgen; |
| } |
| |
| ~CodeGeneratorScope() { |
| top_ = previous_; |
| } |
| |
| static CodeGenerator* Current() { |
| ASSERT(top_ != NULL); |
| return top_; |
| } |
| |
| private: |
| static CodeGenerator* top_; |
| CodeGenerator* previous_; |
| }; |
| |
| |
| // Deferred code objects are small pieces of code that are compiled |
| // out of line. They are used to defer the compilation of uncommon |
| // paths thereby avoiding expensive jumps around uncommon code parts. |
| class DeferredCode: public ZoneObject { |
| public: |
| DeferredCode(); |
| virtual ~DeferredCode() { } |
| |
| virtual void Generate() = 0; |
| |
| CodeGenerator* cgen() const { return CodeGeneratorScope::Current(); } |
| |
| // Set the virtual frame for entry to the deferred code as a |
| // snapshot of the code generator's current frame (plus additional |
| // results). This is optional, but should be done before branching |
| // or jumping to the deferred code. |
| inline void SetEntryFrame(Result* arg); |
| inline void SetEntryFrame(Result* arg0, Result* arg1); |
| |
| JumpTarget* enter() { return &enter_; } |
| |
| void BindExit() { exit_.Bind(0); } |
| void BindExit(Result* result) { exit_.Bind(result, 1); } |
| void BindExit(Result* result0, Result* result1) { |
| exit_.Bind(result0, result1, 2); |
| } |
| void BindExit(Result* result0, Result* result1, Result* result2) { |
| exit_.Bind(result0, result1, result2, 3); |
| } |
| |
| int statement_position() const { return statement_position_; } |
| int position() const { return position_; } |
| |
| #ifdef DEBUG |
| void set_comment(const char* comment) { comment_ = comment; } |
| const char* comment() const { return comment_; } |
| #else |
| void set_comment(const char* comment) { } |
| const char* comment() const { return ""; } |
| #endif |
| |
| protected: |
| JumpTarget enter_; |
| JumpTarget exit_; |
| |
| private: |
| int statement_position_; |
| int position_; |
| #ifdef DEBUG |
| const char* comment_; |
| #endif |
| DISALLOW_COPY_AND_ASSIGN(DeferredCode); |
| }; |
| |
| |
| // RuntimeStub models code stubs calling entry points in the Runtime class. |
| class RuntimeStub : public CodeStub { |
| public: |
| explicit RuntimeStub(Runtime::FunctionId id, int num_arguments) |
| : id_(id), num_arguments_(num_arguments) { } |
| |
| void Generate(MacroAssembler* masm); |
| |
| // Disassembler support. It is useful to be able to print the name |
| // of the runtime function called through this stub. |
| static const char* GetNameFromMinorKey(int minor_key) { |
| return Runtime::FunctionForId(IdField::decode(minor_key))->stub_name; |
| } |
| |
| private: |
| Runtime::FunctionId id_; |
| int num_arguments_; |
| |
| class ArgumentField: public BitField<int, 0, 16> {}; |
| class IdField: public BitField<Runtime::FunctionId, 16, kMinorBits - 16> {}; |
| |
| Major MajorKey() { return Runtime; } |
| int MinorKey() { |
| return IdField::encode(id_) | ArgumentField::encode(num_arguments_); |
| } |
| |
| const char* GetName(); |
| |
| #ifdef DEBUG |
| void Print() { |
| PrintF("RuntimeStub (id %s)\n", Runtime::FunctionForId(id_)->name); |
| } |
| #endif |
| }; |
| |
| |
| class StackCheckStub : public CodeStub { |
| public: |
| StackCheckStub() { } |
| |
| void Generate(MacroAssembler* masm); |
| |
| private: |
| |
| const char* GetName() { return "StackCheckStub"; } |
| |
| Major MajorKey() { return StackCheck; } |
| int MinorKey() { return 0; } |
| }; |
| |
| |
| class UnarySubStub : public CodeStub { |
| public: |
| UnarySubStub() { } |
| |
| private: |
| Major MajorKey() { return UnarySub; } |
| int MinorKey() { return 0; } |
| void Generate(MacroAssembler* masm); |
| |
| const char* GetName() { return "UnarySubStub"; } |
| }; |
| |
| |
| class CEntryStub : public CodeStub { |
| public: |
| CEntryStub() { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, false); } |
| |
| protected: |
| void GenerateBody(MacroAssembler* masm, bool is_debug_break); |
| void GenerateCore(MacroAssembler* masm, |
| Label* throw_normal_exception, |
| Label* throw_out_of_memory_exception, |
| StackFrame::Type frame_type, |
| bool do_gc, |
| bool always_allocate_scope); |
| void GenerateThrowTOS(MacroAssembler* masm); |
| void GenerateThrowOutOfMemory(MacroAssembler* masm); |
| |
| private: |
| Major MajorKey() { return CEntry; } |
| int MinorKey() { return 0; } |
| |
| const char* GetName() { return "CEntryStub"; } |
| }; |
| |
| |
| class CEntryDebugBreakStub : public CEntryStub { |
| public: |
| CEntryDebugBreakStub() { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, true); } |
| |
| private: |
| int MinorKey() { return 1; } |
| |
| const char* GetName() { return "CEntryDebugBreakStub"; } |
| }; |
| |
| |
| class JSEntryStub : public CodeStub { |
| public: |
| JSEntryStub() { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, false); } |
| |
| protected: |
| void GenerateBody(MacroAssembler* masm, bool is_construct); |
| |
| private: |
| Major MajorKey() { return JSEntry; } |
| int MinorKey() { return 0; } |
| |
| const char* GetName() { return "JSEntryStub"; } |
| }; |
| |
| |
| class JSConstructEntryStub : public JSEntryStub { |
| public: |
| JSConstructEntryStub() { } |
| |
| void Generate(MacroAssembler* masm) { GenerateBody(masm, true); } |
| |
| private: |
| int MinorKey() { return 1; } |
| |
| const char* GetName() { return "JSConstructEntryStub"; } |
| }; |
| |
| |
| class ArgumentsAccessStub: public CodeStub { |
| public: |
| enum Type { |
| READ_LENGTH, |
| READ_ELEMENT, |
| NEW_OBJECT |
| }; |
| |
| explicit ArgumentsAccessStub(Type type) : type_(type) { } |
| |
| private: |
| Type type_; |
| |
| Major MajorKey() { return ArgumentsAccess; } |
| int MinorKey() { return type_; } |
| |
| void Generate(MacroAssembler* masm); |
| void GenerateReadLength(MacroAssembler* masm); |
| void GenerateReadElement(MacroAssembler* masm); |
| void GenerateNewObject(MacroAssembler* masm); |
| |
| const char* GetName() { return "ArgumentsAccessStub"; } |
| |
| #ifdef DEBUG |
| void Print() { |
| PrintF("ArgumentsAccessStub (type %d)\n", type_); |
| } |
| #endif |
| }; |
| |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_CODEGEN_H_ |