+ // 15) Create arguments if necessary and place them into the appropriate aliased
+ // registers.
+
+ if (haveArguments) {
+ HashSet<InlineCallFrame*, DefaultHash<InlineCallFrame*>::Hash,
+ NullableHashTraits<InlineCallFrame*> > didCreateArgumentsObject;
+
+ for (size_t index = 0; index < operands.size(); ++index) {
+ const ValueRecovery& recovery = operands[index];
+ if (recovery.technique() != ArgumentsThatWereNotCreated)
+ continue;
+ int operand = operands.operandForIndex(index);
+ // Find the right inline call frame.
+ InlineCallFrame* inlineCallFrame = 0;
+ for (InlineCallFrame* current = exit.m_codeOrigin.inlineCallFrame;
+ current;
+ current = current->caller.inlineCallFrame) {
+ if (current->stackOffset <= operand) {
+ inlineCallFrame = current;
+ break;
+ }
+ }
+
+ if (!m_jit.baselineCodeBlockFor(inlineCallFrame)->usesArguments())
+ continue;
+ int argumentsRegister = m_jit.argumentsRegisterFor(inlineCallFrame);
+ if (didCreateArgumentsObject.add(inlineCallFrame).isNewEntry) {
+ // We know this call frame optimized out an arguments object that
+ // the baseline JIT would have created. Do that creation now.
+ if (inlineCallFrame) {
+ m_jit.addPtr(AssemblyHelpers::TrustedImm32(inlineCallFrame->stackOffset * sizeof(EncodedJSValue)), GPRInfo::callFrameRegister, GPRInfo::regT0);
+ m_jit.setupArguments(GPRInfo::regT0);
+ } else
+ m_jit.setupArgumentsExecState();
+ m_jit.move(
+ AssemblyHelpers::TrustedImmPtr(
+ bitwise_cast<void*>(operationCreateArguments)),
+ GPRInfo::nonArgGPR0);
+ m_jit.call(GPRInfo::nonArgGPR0);
+ m_jit.store64(GPRInfo::returnValueGPR, AssemblyHelpers::addressFor(argumentsRegister));
+ m_jit.store64(
+ GPRInfo::returnValueGPR,
+ AssemblyHelpers::addressFor(unmodifiedArgumentsRegister(argumentsRegister)));
+ m_jit.move(GPRInfo::returnValueGPR, GPRInfo::regT0); // no-op move on almost all platforms.
+ }
+
+ m_jit.load64(AssemblyHelpers::addressFor(argumentsRegister), GPRInfo::regT0);
+ m_jit.store64(GPRInfo::regT0, AssemblyHelpers::addressFor(operand));
+ }
+ }
+
+ // 16) Load the result of the last bytecode operation into regT0.
+
+ if (exit.m_lastSetOperand != std::numeric_limits<int>::max())
+ m_jit.load64(AssemblyHelpers::addressFor((VirtualRegister)exit.m_lastSetOperand), GPRInfo::cachedResultRegister);
+
+ // 17) Adjust the call frame pointer.
+
projects / apple / javascriptcore.git / blobdiff