2008-09-09 20:08:45 +00:00
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// Copyright 2006-2008 the V8 project authors. All rights reserved.
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2008-07-03 15:10:15 +00:00
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_CODEGEN_H_
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#include "ast.h"
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#include "code-stubs.h"
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#include "runtime.h"
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#define V8_CODEGEN_H_
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namespace v8 { namespace internal {
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// Use lazy compilation; defaults to true.
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// NOTE: Do not remove non-lazy compilation until we can properly
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// install extensions with lazy compilation enabled. At the
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// moment, this doesn't work for the extensions in Google3,
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// and we can only run the tests with --nolazy.
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// Forward declaration.
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class CodeGenerator;
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// Deferred code objects are small pieces of code that are compiled
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// out of line. They are used to defer the compilation of uncommon
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// paths thereby avoiding expensive jumps around uncommon code parts.
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class DeferredCode: public ZoneObject {
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public:
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explicit DeferredCode(CodeGenerator* generator);
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virtual ~DeferredCode() { }
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virtual void Generate() = 0;
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MacroAssembler* masm() const { return masm_; }
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CodeGenerator* generator() const { return generator_; }
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Label* enter() { return &enter_; }
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Label* exit() { return &exit_; }
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2008-09-18 08:51:43 +00:00
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int statement_position() const { return statement_position_; }
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int position() const { return position_; }
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#ifdef DEBUG
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void set_comment(const char* comment) { comment_ = comment; }
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const char* comment() const { return comment_; }
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#else
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inline void set_comment(const char* comment) { }
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const char* comment() const { return ""; }
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#endif
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protected:
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// The masm_ field is manipulated when compiling stubs with the
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// BEGIN_STUB and END_STUB macros. For that reason, it cannot be
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// constant.
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MacroAssembler* masm_;
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private:
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CodeGenerator* const generator_;
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Label enter_;
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Label exit_;
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2008-09-18 08:51:43 +00:00
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int statement_position_;
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int position_;
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#ifdef DEBUG
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const char* comment_;
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#endif
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2008-08-28 09:55:41 +00:00
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DISALLOW_COPY_AND_ASSIGN(DeferredCode);
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};
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// A superclass for gode generators. The implementations of methods
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// declared in this class are partially in codegen.c and partially in
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// codegen_<arch>.c.
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class CodeGenerator: public Visitor {
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public:
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CodeGenerator(bool is_eval,
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Handle<Script> script)
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: is_eval_(is_eval),
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script_(script),
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deferred_(8) { }
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// The code generator: Takes a function literal, generates code for it,
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// and assembles it all into a Code* object. This function should only
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// be called by compiler.cc.
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static Handle<Code> MakeCode(FunctionLiteral* fun,
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Handle<Script> script,
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bool is_eval);
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static void SetFunctionInfo(Handle<JSFunction> fun,
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int length,
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int function_token_position,
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int start_position,
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int end_position,
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bool is_expression,
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bool is_toplevel,
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Handle<Script> script);
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virtual MacroAssembler* masm() = 0;
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2008-10-02 11:14:50 +00:00
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virtual Scope* scope() const = 0;
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2008-07-03 15:10:15 +00:00
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void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
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void ProcessDeferred();
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// Accessors for is_eval.
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bool is_eval() { return is_eval_; }
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// Abstract node visitors.
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#define DEF_VISIT(type) \
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virtual void Visit##type(type* node) = 0;
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NODE_LIST(DEF_VISIT)
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#undef DEF_VISIT
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protected:
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bool CheckForInlineRuntimeCall(CallRuntime* node);
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Handle<JSFunction> BuildBoilerplate(FunctionLiteral* node);
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void ProcessDeclarations(ZoneList<Declaration*>* declarations);
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Handle<Code> ComputeCallInitialize(int argc);
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// Declare global variables and functions in the given array of
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// name/value pairs.
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virtual void DeclareGlobals(Handle<FixedArray> pairs) = 0;
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2008-09-15 15:02:38 +00:00
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// Support for type checks.
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virtual void GenerateIsSmi(ZoneList<Expression*>* args) = 0;
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virtual void GenerateIsNonNegativeSmi(ZoneList<Expression*>* args) = 0;
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virtual void GenerateIsArray(ZoneList<Expression*>* args) = 0;
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// Support for arguments.length and arguments[?].
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virtual void GenerateArgumentsLength(ZoneList<Expression*>* args) = 0;
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virtual void GenerateArgumentsAccess(ZoneList<Expression*>* args) = 0;
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// Support for accessing the value field of an object (used by Date).
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virtual void GenerateValueOf(ZoneList<Expression*>* args) = 0;
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virtual void GenerateSetValueOf(ZoneList<Expression*>* args) = 0;
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2008-07-30 08:49:36 +00:00
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// Fast support for charCodeAt(n).
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virtual void GenerateFastCharCodeAt(ZoneList<Expression*>* args) = 0;
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2008-09-08 06:17:38 +00:00
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// Fast support for object equality testing.
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virtual void GenerateObjectEquals(ZoneList<Expression*>* args) = 0;
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private:
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bool is_eval_; // Tells whether code is generated for eval.
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Handle<Script> script_;
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List<DeferredCode*> deferred_;
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};
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// RuntimeStub models code stubs calling entrypoints in the Runtime class.
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class RuntimeStub : public CodeStub {
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public:
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explicit RuntimeStub(Runtime::FunctionId id, int num_arguments)
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: id_(id), num_arguments_(num_arguments) { }
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void Generate(MacroAssembler* masm);
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2008-08-13 09:32:07 +00:00
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// Disassembler support. It is useful to be able to print the name
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// of the runtime function called through this stub.
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static const char* GetNameFromMinorKey(int minor_key) {
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return Runtime::FunctionForId(IdField::decode(minor_key))->stub_name;
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}
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2008-07-03 15:10:15 +00:00
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private:
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Runtime::FunctionId id_;
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2008-08-13 09:32:07 +00:00
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int num_arguments_;
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class ArgumentField: public BitField<int, 0, 16> {};
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class IdField: public BitField<Runtime::FunctionId, 16, kMinorBits - 16> {};
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Major MajorKey() { return Runtime; }
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int MinorKey() {
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return IdField::encode(id_) | ArgumentField::encode(num_arguments_);
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}
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const char* GetName();
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#ifdef DEBUG
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void Print() {
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PrintF("RuntimeStub (id %s)\n", Runtime::FunctionForId(id_)->name);
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}
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#endif
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};
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class StackCheckStub : public CodeStub {
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public:
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StackCheckStub() { }
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void Generate(MacroAssembler* masm);
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private:
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const char* GetName() { return "StackCheckStub"; }
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Major MajorKey() { return StackCheck; }
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int MinorKey() { return 0; }
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};
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class UnarySubStub : public CodeStub {
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public:
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UnarySubStub() { }
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private:
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Major MajorKey() { return UnarySub; }
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int MinorKey() { return 0; }
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void Generate(MacroAssembler* masm);
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const char* GetName() { return "UnarySubStub"; }
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};
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class CEntryStub : public CodeStub {
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public:
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CEntryStub() { }
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void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
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protected:
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void GenerateBody(MacroAssembler* masm, bool is_debug_break);
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void GenerateCore(MacroAssembler* masm,
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Label* throw_normal_exception,
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Label* throw_out_of_memory_exception,
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StackFrame::Type frame_type,
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bool do_gc);
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void GenerateThrowTOS(MacroAssembler* masm);
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void GenerateThrowOutOfMemory(MacroAssembler* masm);
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private:
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Major MajorKey() { return CEntry; }
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int MinorKey() { return 0; }
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const char* GetName() { return "CEntryStub"; }
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};
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class CEntryDebugBreakStub : public CEntryStub {
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public:
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CEntryDebugBreakStub() { }
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void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
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private:
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int MinorKey() { return 1; }
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const char* GetName() { return "CEntryDebugBreakStub"; }
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};
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class JSEntryStub : public CodeStub {
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public:
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JSEntryStub() { }
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void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
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protected:
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void GenerateBody(MacroAssembler* masm, bool is_construct);
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private:
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Major MajorKey() { return JSEntry; }
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int MinorKey() { return 0; }
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const char* GetName() { return "JSEntryStub"; }
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};
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class JSConstructEntryStub : public JSEntryStub {
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public:
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JSConstructEntryStub() { }
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void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
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private:
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int MinorKey() { return 1; }
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const char* GetName() { return "JSConstructEntryStub"; }
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_CODEGEN_H_
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