Commit 56ea256

2019-02-08 Yusuke Suzuki <ysuzuki@apple.com>

[JSC] Shrink sizeof(CodeBlock) more

https://bugs.webkit.org/show_bug.cgi?id=194419

Reviewed by Mark Lam.

This patch further shrinks the size of CodeBlock, from 352 to 296 (304).

1. CodeBlock copies so many data from ScriptExecutable even if ScriptExecutable

has the same information. These data is not touched in CodeBlock::~CodeBlock,

so we can just use the data in ScriptExecutable instead of holding it in CodeBlock.

2. We remove m_instructions pointer since the ownership is managed by UnlinkedCodeBlock.

And we do not touch it in CodeBlock::~CodeBlock.

3. We move m_calleeSaveRegisters from CodeBlock to CodeBlock::JITData. For baseline and LLInt

cases, this patch offers RegisterAtOffsetList::llintBaselineCalleeSaveRegisters() which returns

singleton to `const RegisterAtOffsetList*` usable for LLInt and Baseline JIT CodeBlocks.

4. Move m_catchProfiles to RareData and materialize only when op_catch's slow path is called.

5. Drop ownerScriptExecutable. ownerExecutable() returns ScriptExecutable*.

* bytecode/CodeBlock.cpp:

(JSC::CodeBlock::hash const):

(JSC::CodeBlock::sourceCodeForTools const):

(JSC::CodeBlock::dumpAssumingJITType const):

(JSC::CodeBlock::dumpSource):

(JSC::CodeBlock::CodeBlock):

(JSC::CodeBlock::finishCreation):

(JSC::CodeBlock::propagateTransitions):

(JSC::CodeBlock::finalizeLLIntInlineCaches):

(JSC::CodeBlock::setCalleeSaveRegisters):

(JSC::CodeBlock::ensureCatchLivenessIsComputedForBytecodeOffset):

(JSC::CodeBlock::ensureCatchLivenessIsComputedForBytecodeOffsetSlow):

(JSC::CodeBlock::lineNumberForBytecodeOffset):

(JSC::CodeBlock::expressionRangeForBytecodeOffset const):

(JSC::CodeBlock::hasOpDebugForLineAndColumn):

(JSC::CodeBlock::newReplacement):

(JSC::CodeBlock::replacement):

(JSC::CodeBlock::computeCapabilityLevel):

(JSC::CodeBlock::jettison):

(JSC::CodeBlock::calleeSaveRegisters const):

(JSC::CodeBlock::calleeSaveSpaceAsVirtualRegisters):

(JSC::CodeBlock::updateOSRExitCounterAndCheckIfNeedToReoptimize):

(JSC::CodeBlock::getArrayProfile):

(JSC::CodeBlock::updateAllPredictionsAndCountLiveness):

(JSC::CodeBlock::notifyLexicalBindingUpdate):

(JSC::CodeBlock::tryGetValueProfileForBytecodeOffset):

(JSC::CodeBlock::validate):

(JSC::CodeBlock::outOfLineJumpTarget):

(JSC::CodeBlock::arithProfileForBytecodeOffset):

(JSC::CodeBlock::insertBasicBlockBoundariesForControlFlowProfiler):

* bytecode/CodeBlock.h:

(JSC::CodeBlock::specializationKind const):

(JSC::CodeBlock::isStrictMode const):

(JSC::CodeBlock::isConstructor const):

(JSC::CodeBlock::codeType const):

(JSC::CodeBlock::isKnownNotImmediate):

(JSC::CodeBlock::instructions const):

(JSC::CodeBlock::ownerExecutable const):

(JSC::CodeBlock::thisRegister const):

(JSC::CodeBlock::source const):

(JSC::CodeBlock::sourceOffset const):

(JSC::CodeBlock::firstLineColumnOffset const):

(JSC::CodeBlock::createRareDataIfNecessary):

(JSC::CodeBlock::ownerScriptExecutable const): Deleted.

(JSC::CodeBlock::setThisRegister): Deleted.

(JSC::CodeBlock::calleeSaveRegisters const): Deleted.

* bytecode/EvalCodeBlock.h:

* bytecode/FunctionCodeBlock.h:

* bytecode/GlobalCodeBlock.h:

(JSC::GlobalCodeBlock::GlobalCodeBlock):

* bytecode/ModuleProgramCodeBlock.h:

* bytecode/ProgramCodeBlock.h:

* debugger/Debugger.cpp:

(JSC::Debugger::toggleBreakpoint):

* debugger/DebuggerCallFrame.cpp:

(JSC::DebuggerCallFrame::sourceID const):

(JSC::DebuggerCallFrame::sourceIDForCallFrame):

* debugger/DebuggerScope.cpp:

(JSC::DebuggerScope::location const):

* dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::InlineStackEntry::executable):

(JSC::DFG::ByteCodeParser::inliningCost):

(JSC::DFG::ByteCodeParser::parseCodeBlock):

* dfg/DFGCapabilities.cpp:

(JSC::DFG::isSupportedForInlining):

(JSC::DFG::mightCompileEval):

(JSC::DFG::mightCompileProgram):

(JSC::DFG::mightCompileFunctionForCall):

(JSC::DFG::mightCompileFunctionForConstruct):

(JSC::DFG::canUseOSRExitFuzzing):

* dfg/DFGGraph.h:

(JSC::DFG::Graph::executableFor):

* dfg/DFGJITCompiler.cpp:

(JSC::DFG::JITCompiler::compileFunction):

* dfg/DFGOSREntry.cpp:

(JSC::DFG::prepareOSREntry):

* dfg/DFGOSRExit.cpp:

(JSC::DFG::restoreCalleeSavesFor):

(JSC::DFG::saveCalleeSavesFor):

(JSC::DFG::saveOrCopyCalleeSavesFor):

* dfg/DFGOSRExitCompilerCommon.cpp:

(JSC::DFG::handleExitCounts):

* dfg/DFGOperations.cpp:

* dfg/DFGToFTLDeferredCompilationCallback.cpp:

(JSC::DFG::ToFTLDeferredCompilationCallback::compilationDidComplete):

* ftl/FTLCapabilities.cpp:

(JSC::FTL::canCompile):

* ftl/FTLLink.cpp:

(JSC::FTL::link):

* ftl/FTLOSRExitCompiler.cpp:

(JSC::FTL::compileStub):

* interpreter/CallFrame.cpp:

(JSC::CallFrame::callerSourceOrigin):

* interpreter/Interpreter.cpp:

(JSC::eval):

(JSC::UnwindFunctor::copyCalleeSavesToEntryFrameCalleeSavesBuffer const):

* interpreter/StackVisitor.cpp:

(JSC::StackVisitor::Frame::calleeSaveRegisters):

(JSC::StackVisitor::Frame::sourceURL const):

(JSC::StackVisitor::Frame::sourceID):

(JSC::StackVisitor::Frame::computeLineAndColumn const):

* interpreter/StackVisitor.h:

* jit/AssemblyHelpers.h:

(JSC::AssemblyHelpers::emitSaveCalleeSavesFor):

(JSC::AssemblyHelpers::emitSaveOrCopyCalleeSavesFor):

(JSC::AssemblyHelpers::emitRestoreCalleeSavesFor):

* jit/CallFrameShuffleData.cpp:

(JSC::CallFrameShuffleData::setupCalleeSaveRegisters):

* jit/JIT.cpp:

(JSC::JIT::compileWithoutLinking):

* jit/JITToDFGDeferredCompilationCallback.cpp:

(JSC::JITToDFGDeferredCompilationCallback::compilationDidComplete):

* jit/JITWorklist.cpp:

(JSC::JITWorklist::Plan::finalize):

(JSC::JITWorklist::compileNow):

* jit/RegisterAtOffsetList.cpp:

(JSC::RegisterAtOffsetList::llintBaselineCalleeSaveRegisters):

* jit/RegisterAtOffsetList.h:

(JSC::RegisterAtOffsetList::at const):

* runtime/ErrorInstance.cpp:

(JSC::appendSourceToError):

* runtime/ScriptExecutable.cpp:

(JSC::ScriptExecutable::newCodeBlockFor):

* runtime/StackFrame.cpp:

(JSC::StackFrame::sourceID const):

(JSC::StackFrame::sourceURL const):

(JSC::StackFrame::computeLineAndColumn const):