2010-09-15 Oliver Hunt <oliver@apple.com>
Reviewed by Geoffrey Garen.
Use free variable analysis to improve activation performance
https://bugs.webkit.org/show_bug.cgi?id=45837
Adds free and captured variable tracking to the JS parser. This
allows us to avoid construction of an activation object in some
cases. Future patches will make more use of this information to
improve those cases where activations are still needed.
* parser/ASTBuilder.h:
* parser/JSParser.cpp:
(JSC::JSParser::Scope::Scope):
(JSC::JSParser::Scope::declareVariable):
(JSC::JSParser::Scope::useVariable):
(JSC::JSParser::Scope::collectFreeVariables):
(JSC::JSParser::Scope::capturedVariables):
(JSC::JSParser::ScopeRef::ScopeRef):
(JSC::JSParser::ScopeRef::operator->):
(JSC::JSParser::ScopeRef::index):
(JSC::JSParser::currentScope):
(JSC::JSParser::pushScope):
(JSC::JSParser::popScope):
(JSC::JSParser::parseProgram):
(JSC::JSParser::parseVarDeclarationList):
(JSC::JSParser::parseConstDeclarationList):
(JSC::JSParser::parseTryStatement):
(JSC::JSParser::parseFormalParameters):
(JSC::JSParser::parseFunctionInfo):
(JSC::JSParser::parseFunctionDeclaration):
(JSC::JSParser::parsePrimaryExpression):
* parser/Nodes.cpp:
(JSC::ScopeNodeData::ScopeNodeData):
(JSC::ScopeNode::ScopeNode):
(JSC::ProgramNode::ProgramNode):
(JSC::ProgramNode::create):
(JSC::EvalNode::EvalNode):
(JSC::EvalNode::create):
(JSC::FunctionBodyNode::FunctionBodyNode):
(JSC::FunctionBodyNode::create):
* parser/Nodes.h:
(JSC::ScopeNode::needsActivation):
(JSC::ScopeNode::hasCapturedVariables):
* parser/Parser.cpp:
(JSC::Parser::didFinishParsing):
* parser/Parser.h:
(JSC::Parser::parse):
* parser/SyntaxChecker.h:
* runtime/Executable.cpp:
(JSC::EvalExecutable::compileInternal):
(JSC::ProgramExecutable::compileInternal):
(JSC::FunctionExecutable::compileForCallInternal):
(JSC::FunctionExecutable::compileForConstructInternal):
* runtime/Executable.h:
(JSC::ScriptExecutable::needsActivation):
(JSC::ScriptExecutable::recordParse):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@67583 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/JavaScriptCore/parser/SyntaxChecker.h b/JavaScriptCore/parser/SyntaxChecker.h
index e05facd..ce3ab61 100644
--- a/JavaScriptCore/parser/SyntaxChecker.h
+++ b/JavaScriptCore/parser/SyntaxChecker.h
@@ -70,6 +70,7 @@
typedef int BinaryOperand;
static const bool CreatesAST = false;
+ static const bool NeedsFreeVariableInfo = false;
int createSourceElements() { return 1; }
int makeFunctionCallNode(int, int, int, int, int) { return 1; }
