Changeset 193766 in webkit for trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp

Timestamp:

Dec 8, 2015, 12:24:04 PM (10 years ago)

Author:

[email protected]

Message:

[ES6] "super" and "this" should be lexically bound inside an arrow function and should live in a JSLexicalEnvironment
​https://bugs.webkit.org/show_bug.cgi?id=149338

Source/JavaScriptCore:

Patch by Aleksandr Skachkov <​[email protected]> on 2015-12-05
Reviewed by Saam Barati.

Implemented new version of the lexically bound 'this' in arrow function. In current version
'this' is stored inside of the lexical environment of the function. To store and load we use
op_get_from_scope and op_put_to_scope operations. Also new implementation prevent raising TDZ
error for arrow functions that are declared before super() but invoke after.

• builtins/BuiltinExecutables.cpp:

(JSC::createExecutableInternal):

• bytecode/BytecodeList.json:
• bytecode/BytecodeUseDef.h:
• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::dumpBytecode):

• bytecode/EvalCodeCache.h:

(JSC::EvalCodeCache::getSlow):

• bytecode/ExecutableInfo.h:

(JSC::ExecutableInfo::ExecutableInfo):
(JSC::ExecutableInfo::isDerivedConstructorContext):
(JSC::ExecutableInfo::isArrowFunctionContext):

• bytecode/UnlinkedCodeBlock.cpp:

(JSC::UnlinkedCodeBlock::UnlinkedCodeBlock):

• bytecode/UnlinkedCodeBlock.h:

(JSC::UnlinkedCodeBlock::isArrowFunction):
(JSC::UnlinkedCodeBlock::isDerivedConstructorContext):
(JSC::UnlinkedCodeBlock::isArrowFunctionContext):

• bytecode/UnlinkedFunctionExecutable.cpp:

(JSC::generateUnlinkedFunctionCodeBlock):
(JSC::UnlinkedFunctionExecutable::UnlinkedFunctionExecutable):

• bytecode/UnlinkedFunctionExecutable.h:
• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::BytecodeGenerator):
(JSC::BytecodeGenerator::initializeArrowFunctionContextScopeIfNeeded):
(JSC::BytecodeGenerator::variable):
(JSC::BytecodeGenerator::emitNewArrowFunctionExpression):
(JSC::BytecodeGenerator::emitLoadArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadThisFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadNewTargetFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadDerivedConstructorFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitPutNewTargetToArrowFunctionContextScope):
(JSC::BytecodeGenerator::emitPutDerivedConstructorToArrowFunctionContextScope):
(JSC::BytecodeGenerator::emitPutThisToArrowFunctionContextScope):

• bytecompiler/BytecodeGenerator.h:

(JSC::BytecodeGenerator::isDerivedConstructorContext):
(JSC::BytecodeGenerator::usesArrowFunction):
(JSC::BytecodeGenerator::needsToUpdateArrowFunctionContext):
(JSC::BytecodeGenerator::usesEval):
(JSC::BytecodeGenerator::usesThis):
(JSC::BytecodeGenerator::newTarget):
(JSC::BytecodeGenerator::makeFunction):

• bytecompiler/NodesCodegen.cpp:

(JSC::ThisNode::emitBytecode):
(JSC::SuperNode::emitBytecode):
(JSC::EvalFunctionCallNode::emitBytecode):
(JSC::FunctionCallValueNode::emitBytecode):
(JSC::FunctionNode::emitBytecode):

• debugger/DebuggerCallFrame.cpp:

(JSC::DebuggerCallFrame::evaluate):

• dfg/DFGAbstractInterpreterInlines.h:
• dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::parseBlock):

• dfg/DFGCapabilities.cpp:
• dfg/DFGClobberize.h:
• dfg/DFGDoesGC.cpp:
• dfg/DFGFixupPhase.cpp:
• dfg/DFGNodeType.h:
• dfg/DFGObjectAllocationSinkingPhase.cpp:
• dfg/DFGPredictionPropagationPhase.cpp:
• dfg/DFGPromotedHeapLocation.cpp:
• dfg/DFGPromotedHeapLocation.h:
• dfg/DFGSafeToExecute.h:
• dfg/DFGSpeculativeJIT.cpp:
• dfg/DFGSpeculativeJIT.h:
• dfg/DFGSpeculativeJIT32_64.cpp:
• dfg/DFGSpeculativeJIT64.cpp:
• ftl/FTLCapabilities.cpp:
• ftl/FTLLowerDFGToLLVM.cpp:
• ftl/FTLOperations.cpp:

(JSC::FTL::operationMaterializeObjectInOSR):

• interpreter/Interpreter.cpp:

(JSC::eval):

• jit/JIT.cpp:
• jit/JIT.h:
• jit/JITOpcodes.cpp:

(JSC::JIT::emitNewFuncExprCommon):

• jit/JITOpcodes32_64.cpp:
• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::LLINT_SLOW_PATH_DECL):

• llint/LowLevelInterpreter.asm:
• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:
• parser/ASTBuilder.h:

(JSC::ASTBuilder::createArrowFunctionExpr):
(JSC::ASTBuilder::usesArrowFunction):

• parser/Nodes.h:

(JSC::ScopeNode::usesArrowFunction):

• parser/Parser.cpp:

(JSC::Parser<LexerType>::parseFunctionInfo):

• parser/ParserModes.h:
• runtime/CodeCache.cpp:

(JSC::CodeCache::getGlobalCodeBlock):
(JSC::CodeCache::getProgramCodeBlock):
(JSC::CodeCache::getEvalCodeBlock):
(JSC::CodeCache::getModuleProgramCodeBlock):
(JSC::CodeCache::getFunctionExecutableFromGlobalCode):

• runtime/CodeCache.h:
• runtime/CommonIdentifiers.h:
• runtime/CommonSlowPaths.cpp:

(JSC::SLOW_PATH_DECL):

• runtime/Executable.cpp:

(JSC::ScriptExecutable::ScriptExecutable):
(JSC::EvalExecutable::create):
(JSC::EvalExecutable::EvalExecutable):
(JSC::ProgramExecutable::ProgramExecutable):
(JSC::ModuleProgramExecutable::ModuleProgramExecutable):
(JSC::FunctionExecutable::FunctionExecutable):

• runtime/Executable.h:

(JSC::ScriptExecutable::isArrowFunctionContext):
(JSC::ScriptExecutable::isDerivedConstructorContext):

• runtime/JSGlobalObject.cpp:

(JSC::JSGlobalObject::createEvalCodeBlock):

• runtime/JSGlobalObject.h:
• runtime/JSGlobalObjectFunctions.cpp:

(JSC::globalFuncEval):

• tests/es6.yaml:
• tests/stress/arrowfunction-activation-sink-osrexit.js:
• tests/stress/arrowfunction-activation-sink.js:
• tests/stress/arrowfunction-lexical-bind-newtarget.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-1.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-2.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-3.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-4.js: Added.
• tests/stress/arrowfunction-lexical-bind-this-1.js:
• tests/stress/arrowfunction-lexical-bind-this-7.js: Added.
• tests/stress/arrowfunction-tdz-1.js: Added.
• tests/stress/arrowfunction-tdz-2.js: Added.
• tests/stress/arrowfunction-tdz-3.js: Added.
• tests/stress/arrowfunction-tdz-4.js: Added.
• tests/stress/arrowfunction-tdz.js: Removed.

LayoutTests:

Patch by Skachkov Oleksandr <​[email protected]> on 2015-12-08
Reviewed by Saam Barati.

• js/arrowfunction-supercall-expected.txt: Added.
• js/arrowfunction-supercall.html: Added.
• js/arrowfunction-tdz-expected.txt: Added new expectation.
• js/script-tests/arrowfunction-supercall.js: Added.
• js/script-tests/arrowfunction-tdz.js: Added new cases.

File:

• trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp (modified) (2 diffs)

trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp

@@ -770 +770 @@
             break;
         }
-        case op_load_arrowfunction_this: {
-            int r0 = (++it)->u.operand;
-            printLocationOpAndRegisterOperand(out, exec, location, it, "load_arrowfunction_this", r0);
-            break;
-        }
         case op_create_direct_arguments: {
             int r0 = (++it)->u.operand;
@@ -1332 +1327 @@
             int r1 = (++it)->u.operand;
             int f0 = (++it)->u.operand;
-            int r2 = (++it)->u.operand;
             printLocationAndOp(out, exec, location, it, "op_new_arrow_func_exp");
-            out.printf("%s, %s, f%d, %s", registerName(r0).data(), registerName(r1).data(), f0, registerName(r2).data());
+            out.printf("%s, %s, f%d", registerName(r0).data(), registerName(r1).data(), f0);
             break;
         }