Imported v8 version 3.7.3 from https://github.com/v8/v8.git

Change-Id: I152648081e46f599c2bb88eaaf67034fa5daac3a

1 files changed, 321 insertions, 0 deletions

diff --git a/src/3rdparty/v8/src/compiler.h b/src/3rdparty/v8/src/compiler.h
new file mode 100644
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+++ b/src/3rdparty/v8/src/compiler.h
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+// Copyright 2011 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_COMPILER_H_
+#define V8_COMPILER_H_
+
+#include "allocation.h"
+#include "ast.h"
+#include "zone.h"
+
+namespace v8 {
+namespace internal {
+
+class ScriptDataImpl;
+
+// CompilationInfo encapsulates some information known at compile time.  It
+// is constructed based on the resources available at compile-time.
+class CompilationInfo BASE_EMBEDDED {
+ public:
+  explicit CompilationInfo(Handle<Script> script);
+  explicit CompilationInfo(Handle<SharedFunctionInfo> shared_info);
+  explicit CompilationInfo(Handle<JSFunction> closure);
+
+  Isolate* isolate() {
+    ASSERT(Isolate::Current() == isolate_);
+    return isolate_;
+  }
+  bool is_lazy() const { return IsLazy::decode(flags_); }
+  bool is_eval() const { return IsEval::decode(flags_); }
+  bool is_global() const { return IsGlobal::decode(flags_); }
+  bool is_strict_mode() const { return strict_mode_flag() == kStrictMode; }
+  StrictModeFlag strict_mode_flag() const {
+    return StrictModeFlagField::decode(flags_);
+  }
+  bool is_in_loop() const { return IsInLoop::decode(flags_); }
+  FunctionLiteral* function() const { return function_; }
+  Scope* scope() const { return scope_; }
+  Handle<Code> code() const { return code_; }
+  Handle<JSFunction> closure() const { return closure_; }
+  Handle<SharedFunctionInfo> shared_info() const { return shared_info_; }
+  Handle<Script> script() const { return script_; }
+  v8::Extension* extension() const { return extension_; }
+  ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
+  Handle<Context> calling_context() const { return calling_context_; }
+  int osr_ast_id() const { return osr_ast_id_; }
+
+  void MarkAsEval() {
+    ASSERT(!is_lazy());
+    flags_ |= IsEval::encode(true);
+  }
+  void MarkAsGlobal() {
+    ASSERT(!is_lazy());
+    flags_ |= IsGlobal::encode(true);
+  }
+  void SetStrictModeFlag(StrictModeFlag strict_mode_flag) {
+    ASSERT(StrictModeFlagField::decode(flags_) == kNonStrictMode ||
+           StrictModeFlagField::decode(flags_) == strict_mode_flag);
+    flags_ = StrictModeFlagField::update(flags_, strict_mode_flag);
+  }
+  void MarkAsInLoop() {
+    ASSERT(is_lazy());
+    flags_ |= IsInLoop::encode(true);
+  }
+  void MarkAsNative() {
+    flags_ |= IsNative::encode(true);
+  }
+  bool is_native() const {
+    return IsNative::decode(flags_);
+  }
+  void SetFunction(FunctionLiteral* literal) {
+    ASSERT(function_ == NULL);
+    function_ = literal;
+  }
+  void SetScope(Scope* scope) {
+    ASSERT(scope_ == NULL);
+    scope_ = scope;
+  }
+  void SetCode(Handle<Code> code) { code_ = code; }
+  void SetExtension(v8::Extension* extension) {
+    ASSERT(!is_lazy());
+    extension_ = extension;
+  }
+  void SetPreParseData(ScriptDataImpl* pre_parse_data) {
+    ASSERT(!is_lazy());
+    pre_parse_data_ = pre_parse_data;
+  }
+  void SetCallingContext(Handle<Context> context) {
+    ASSERT(is_eval());
+    calling_context_ = context;
+  }
+  void SetOsrAstId(int osr_ast_id) {
+    ASSERT(IsOptimizing());
+    osr_ast_id_ = osr_ast_id;
+  }
+  void MarkCompilingForDebugging(Handle<Code> current_code) {
+    ASSERT(mode_ != OPTIMIZE);
+    ASSERT(current_code->kind() == Code::FUNCTION);
+    flags_ |= IsCompilingForDebugging::encode(true);
+    if (current_code->is_compiled_optimizable()) {
+      EnableDeoptimizationSupport();
+    } else {
+      mode_ = CompilationInfo::NONOPT;
+    }
+  }
+  bool IsCompilingForDebugging() {
+    return IsCompilingForDebugging::decode(flags_);
+  }
+
+  bool has_global_object() const {
+    return !closure().is_null() && (closure()->context()->global() != NULL);
+  }
+
+  GlobalObject* global_object() const {
+    return has_global_object() ? closure()->context()->global() : NULL;
+  }
+
+  // Accessors for the different compilation modes.
+  bool IsOptimizing() const { return mode_ == OPTIMIZE; }
+  bool IsOptimizable() const { return mode_ == BASE; }
+  void SetOptimizing(int osr_ast_id) {
+    SetMode(OPTIMIZE);
+    osr_ast_id_ = osr_ast_id;
+  }
+  void DisableOptimization();
+
+  // Deoptimization support.
+  bool HasDeoptimizationSupport() const {
+    return SupportsDeoptimization::decode(flags_);
+  }
+  void EnableDeoptimizationSupport() {
+    ASSERT(IsOptimizable());
+    flags_ |= SupportsDeoptimization::encode(true);
+  }
+
+  // Determine whether or not we can adaptively optimize.
+  bool AllowOptimize() {
+    return V8::UseCrankshaft() && !closure_.is_null();
+  }
+
+  // Disable all optimization attempts of this info for the rest of the
+  // current compilation pipeline.
+  void AbortOptimization();
+
+ private:
+  Isolate* isolate_;
+
+  // Compilation mode.
+  // BASE is generated by the full codegen, optionally prepared for bailouts.
+  // OPTIMIZE is optimized code generated by the Hydrogen-based backend.
+  // NONOPT is generated by the full codegen or the classic backend
+  //   and is not prepared for recompilation/bailouts. These functions
+  //   are never recompiled.
+  enum Mode {
+    BASE,
+    OPTIMIZE,
+    NONOPT
+  };
+
+  CompilationInfo() : function_(NULL) {}
+
+  void Initialize(Mode mode) {
+    mode_ = V8::UseCrankshaft() ? mode : NONOPT;
+    ASSERT(!script_.is_null());
+    if (script_->type()->value() == Script::TYPE_NATIVE) {
+      MarkAsNative();
+    }
+    if (!shared_info_.is_null()) {
+      ASSERT(strict_mode_flag() == kNonStrictMode);
+      SetStrictModeFlag(shared_info_->strict_mode_flag());
+    }
+  }
+
+  void SetMode(Mode mode) {
+    ASSERT(V8::UseCrankshaft());
+    mode_ = mode;
+  }
+
+  // Flags using template class BitField<type, start, length>.  All are
+  // false by default.
+  //
+  // Compilation is either eager or lazy.
+  class IsLazy:   public BitField<bool, 0, 1> {};
+  // Flags that can be set for eager compilation.
+  class IsEval:   public BitField<bool, 1, 1> {};
+  class IsGlobal: public BitField<bool, 2, 1> {};
+  // Flags that can be set for lazy compilation.
+  class IsInLoop: public BitField<bool, 3, 1> {};
+  // Strict mode - used in eager compilation.
+  class StrictModeFlagField: public BitField<StrictModeFlag, 4, 1> {};
+  // Is this a function from our natives.
+  class IsNative: public BitField<bool, 6, 1> {};
+  // Is this code being compiled with support for deoptimization..
+  class SupportsDeoptimization: public BitField<bool, 7, 1> {};
+  // If compiling for debugging produce just full code matching the
+  // initial mode setting.
+  class IsCompilingForDebugging: public BitField<bool, 8, 1> {};
+
+
+  unsigned flags_;
+
+  // Fields filled in by the compilation pipeline.
+  // AST filled in by the parser.
+  FunctionLiteral* function_;
+  // The scope of the function literal as a convenience.  Set to indicate
+  // that scopes have been analyzed.
+  Scope* scope_;
+  // The compiled code.
+  Handle<Code> code_;
+
+  // Possible initial inputs to the compilation process.
+  Handle<JSFunction> closure_;
+  Handle<SharedFunctionInfo> shared_info_;
+  Handle<Script> script_;
+
+  // Fields possibly needed for eager compilation, NULL by default.
+  v8::Extension* extension_;
+  ScriptDataImpl* pre_parse_data_;
+
+  // The context of the caller is needed for eval code, and will be a null
+  // handle otherwise.
+  Handle<Context> calling_context_;
+
+  // Compilation mode flag and whether deoptimization is allowed.
+  Mode mode_;
+  int osr_ast_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
+};
+
+
+// The V8 compiler
+//
+// General strategy: Source code is translated into an anonymous function w/o
+// parameters which then can be executed. If the source code contains other
+// functions, they will be compiled and allocated as part of the compilation
+// of the source code.
+
+// Please note this interface returns shared function infos.  This means you
+// need to call Factory::NewFunctionFromSharedFunctionInfo before you have a
+// real function with a context.
+
+class Compiler : public AllStatic {
+ public:
+  // Default maximum number of function optimization attempts before we
+  // give up.
+  static const int kDefaultMaxOptCount = 10;
+
+  static const int kMaxInliningLevels = 3;
+
+  // All routines return a SharedFunctionInfo.
+  // If an error occurs an exception is raised and the return handle
+  // contains NULL.
+
+  // Compile a String source within a context.
+  static Handle<SharedFunctionInfo> Compile(Handle<String> source,
+                                            Handle<Object> script_name,
+                                            int line_offset,
+                                            int column_offset,
+                                            v8::Extension* extension,
+                                            ScriptDataImpl* pre_data,
+                                            Handle<Object> script_data,
+                                            NativesFlag is_natives_code);
+
+  // Compile a String source within a context for Eval.
+  static Handle<SharedFunctionInfo> CompileEval(Handle<String> source,
+                                                Handle<Context> context,
+                                                bool is_global,
+                                                StrictModeFlag strict_mode);
+
+  // Compile from function info (used for lazy compilation). Returns true on
+  // success and false if the compilation resulted in a stack overflow.
+  static bool CompileLazy(CompilationInfo* info);
+
+  // Compile a shared function info object (the function is possibly lazily
+  // compiled).
+  static Handle<SharedFunctionInfo> BuildFunctionInfo(FunctionLiteral* node,
+                                                      Handle<Script> script);
+
+  // Set the function info for a newly compiled function.
+  static void SetFunctionInfo(Handle<SharedFunctionInfo> function_info,
+                              FunctionLiteral* lit,
+                              bool is_toplevel,
+                              Handle<Script> script);
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  static bool MakeCodeForLiveEdit(CompilationInfo* info);
+#endif
+
+  static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
+                                        CompilationInfo* info,
+                                        Handle<SharedFunctionInfo> shared);
+};
+
+
+} }  // namespace v8::internal
+
+#endif  // V8_COMPILER_H_