A64: Synchronize with r18642.

src/a64/full-codegen-a64.cc

 // Copyright 2013 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
@@ skipping 99 matching lines @@
 };
 
 
 // Generate code for a JS function. On entry to the function the receiver
 // and arguments have been pushed on the stack left to right. The actual
 // argument count matches the formal parameter count expected by the
 // function.
 //
 // The live registers are:
 //   - x1: the JS function object being called (i.e. ourselves).
-//   - x5: call kind or strict mode.
 //   - cp: our context.
 //   - fp: our caller's frame pointer.
 //   - jssp: stack pointer.
 //   - lr: return address.
 //
 // The function builds a JS frame. See JavaScriptFrameConstants in
 // frames-arm.h for its layout.
 void FullCodeGenerator::Generate() {
   CompilationInfo* info = info_;
   handler_table_ =
@@ skipping 10 matching lines @@
       info->function()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
     __ Debug("stop-at", __LINE__, BREAK);
   }
 #endif
 
   // Classic mode functions and builtins need to replace the receiver with the
   // global proxy when called as functions (without an explicit receiver
   // object).
   if (info->is_classic_mode() && !info->is_native()) {
     Label ok;
-    __ Cbz(x5, &ok);
     int receiver_offset = info->scope()->num_parameters() * kXRegSizeInBytes;
     __ Peek(x10, receiver_offset);
     __ JumpIfNotRoot(x10, Heap::kUndefinedValueRootIndex, &ok);
 
     __ Ldr(x10, GlobalObjectMemOperand());
     __ Ldr(x10, FieldMemOperand(x10, GlobalObject::kGlobalReceiverOffset));
     __ Poke(x10, receiver_offset);
 
     __ Bind(&ok);
   }
@@ skipping 2162 matching lines @@
   int arg_count = args->length();
   { PreservePositionScope scope(masm()->positions_recorder());
     for (int i = 0; i < arg_count; i++) {
       VisitForStackValue(args->at(i));
     }
     __ Mov(x2, Operand(name));
   }
   // Record source position for debugger.
   SetSourcePosition(expr->position());
   // Call the IC initialization code.
-  Handle<Code> ic =
-      isolate()->stub_cache()->ComputeCallInitialize(arg_count, mode);
+  Handle<Code> ic = isolate()->stub_cache()->ComputeCallInitialize(arg_count);
   TypeFeedbackId ast_id = mode == CONTEXTUAL
       ? TypeFeedbackId::None()
       : expr->CallFeedbackId();
   CallIC(ic, mode, ast_id);
   RecordJSReturnSite(expr);
   // Restore context register.
   __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->Plug(x0);
 }
 
@@ skipping 24 matching lines @@
       isolate()->stub_cache()->ComputeKeyedCallInitialize(arg_count);
   __ Peek(x2, (arg_count + 1) * kXRegSizeInBytes);  // Key.
   CallIC(ic, NOT_CONTEXTUAL, expr->CallFeedbackId());
   RecordJSReturnSite(expr);
   // Restore context register.
   __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->DropAndPlug(1, x0);  // Drop the key still on the stack.
 }
 
 
-void FullCodeGenerator::EmitCallWithStub(Call* expr, CallFunctionFlags flags) {
+void FullCodeGenerator::EmitCallWithStub(Call* expr) {
   // Code common for calls using the call stub.
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
   { PreservePositionScope scope(masm()->positions_recorder());
     for (int i = 0; i < arg_count; i++) {
       VisitForStackValue(args->at(i));
     }
   }
   // Record source position for debugger.
   SetSourcePosition(expr->position());
 
-  // Record call targets in unoptimized code.
-  flags = static_cast<CallFunctionFlags>(flags | RECORD_CALL_TARGET);
   Handle<Object> uninitialized =
       TypeFeedbackCells::UninitializedSentinel(isolate());
   Handle<Cell> cell =
       isolate()->factory()->NewCell(uninitialized);
   RecordTypeFeedbackCell(expr->CallFeedbackId(), cell);
   __ Mov(x2, Operand(cell));
 
-  CallFunctionStub stub(arg_count, flags);
+  // Record call targets in unoptimized code.
+  CallFunctionStub stub(arg_count, RECORD_CALL_TARGET);
   __ Peek(x1, (arg_count + 1) * kXRegSizeInBytes);
   __ CallStub(&stub, expr->CallFeedbackId());
   RecordJSReturnSite(expr);
   // Restore context register.
   __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->DropAndPlug(1, x0);
 }
 
 
 void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
@@ skipping 116 matching lines @@
       __ Push(x0);
       // The receiver is implicitly the global receiver. Indicate this
       // by passing the undefined to the call function stub.
       __ LoadRoot(x1, Heap::kUndefinedValueRootIndex);
       __ Push(x1);
       __ Bind(&call);
     }
 
     // The receiver is either the global receiver or an object found
     // by LoadContextSlot.
-    EmitCallWithStub(expr, NO_CALL_FUNCTION_FLAGS);
+    EmitCallWithStub(expr);
   } else if (property != NULL) {
     { PreservePositionScope scope(masm()->positions_recorder());
       VisitForStackValue(property->obj());
     }
     if (property->key()->IsPropertyName()) {
       EmitCallWithIC(expr,
                      property->key()->AsLiteral()->value(),
                      NOT_CONTEXTUAL);
     } else {
       EmitKeyedCallWithIC(expr, property->key());
     }
 
   } else {
     // Call to an arbitrary expression not handled specially above.
     { PreservePositionScope scope(masm()->positions_recorder());
       VisitForStackValue(callee);
     }
     __ LoadRoot(x1, Heap::kUndefinedValueRootIndex);
     __ Push(x1);
     // Emit function call.
-    EmitCallWithStub(expr, NO_CALL_FUNCTION_FLAGS);
+    EmitCallWithStub(expr);
   }
 
 #ifdef DEBUG
   // RecordJSReturnSite should have been called.
   ASSERT(expr->return_is_recorded_);
 #endif
 }
 
 
 void FullCodeGenerator::VisitCallNew(CallNew* expr) {
@@ skipping 922 matching lines @@
   VisitForAccumulatorValue(args->last());  // Function.
 
   Label runtime, done;
   // Check for non-function argument (including proxy).
   __ JumpIfSmi(x0, &runtime);
   __ JumpIfNotObjectType(x0, x1, x1, JS_FUNCTION_TYPE, &runtime);
 
   // InvokeFunction requires the function in x1. Move it in there.
   __ Mov(x1, x0);
   ParameterCount count(arg_count);
-  __ InvokeFunction(x1, count, CALL_FUNCTION,
-                    NullCallWrapper(), CALL_AS_FUNCTION);
+  __ InvokeFunction(x1, count, CALL_FUNCTION, NullCallWrapper());
   __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   __ B(&done);
 
   __ Bind(&runtime);
   __ Push(x0);
   __ CallRuntime(Runtime::kCall, args->length());
   __ Bind(&done);
 
   context()->Plug(x0);
 }
@@ skipping 377 matching lines @@
   }
 
   int arg_count = args->length();
   for (int i = 0; i < arg_count; i++) {
     VisitForStackValue(args->at(i));
   }
 
   if (expr->is_jsruntime()) {
     // Call the JS runtime function.
     __ Mov(x2, Operand(expr->name()));
-    ContextualMode mode = NOT_CONTEXTUAL;
-    Handle<Code> ic =
-        isolate()->stub_cache()->ComputeCallInitialize(arg_count, mode);
-    CallIC(ic, mode, expr->CallRuntimeFeedbackId());
+    Handle<Code> ic = isolate()->stub_cache()->ComputeCallInitialize(arg_count);
+    CallIC(ic, NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId());
     // Restore context register.
     __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   } else {
     // Call the C runtime function.
     __ CallRuntime(expr->function(), arg_count);
   }
 
   context()->Plug(x0);
 }
 
@@ skipping 679 matching lines @@
       break;
     }
   }
 }
 
 
 void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
     Expression *value,
     JSGeneratorObject::ResumeMode resume_mode) {
   ASM_LOCATION("FullCodeGenerator::EmitGeneratorResume");
+  Register value_reg = x0;
   Register generator_object = x1;
   Register the_hole = x2;
   Register operand_stack_size = w3;
   Register function = x4;
 
   // The value stays in x0, and is ultimately read by the resumed generator, as
-  // if the CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. x1
+  // if the CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. Or it
+  // is read to throw the value when the resumed generator is already closed. r1
   // will hold the generator object until the activation has been resumed.
   VisitForStackValue(generator);
   VisitForAccumulatorValue(value);
   __ Pop(generator_object);
 
   // Check generator state.
-  Label wrong_state, done;
+  Label wrong_state, closed_state, done;
   __ Ldr(x10, FieldMemOperand(generator_object,
                               JSGeneratorObject::kContinuationOffset));
-  STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting <= 0);
-  STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed <= 0);
-  __ CompareAndBranch(x10, Operand(Smi::FromInt(0)), le, &wrong_state);
+  STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting < 0);
+  STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed == 0);
+  __ CompareAndBranch(x10, Operand(Smi::FromInt(0)), eq, &closed_state);
+  __ CompareAndBranch(x10, Operand(Smi::FromInt(0)), lt, &wrong_state);
 
   // Load suspended function and context.
   __ Ldr(cp, FieldMemOperand(generator_object,
                              JSGeneratorObject::kContextOffset));
   __ Ldr(function, FieldMemOperand(generator_object,
                                    JSGeneratorObject::kFunctionOffset));
 
   // Load receiver and store as the first argument.
   __ Ldr(x10, FieldMemOperand(generator_object,
                               JSGeneratorObject::kReceiverOffset));
@@ skipping 68 matching lines @@
   __ Push(the_hole);
   __ B(&push_operand_holes);
 
   __ Bind(&call_resume);
   __ Mov(x10, Operand(Smi::FromInt(resume_mode)));
   __ Push(generator_object, result_register(), x10);
   __ CallRuntime(Runtime::kResumeJSGeneratorObject, 3);
   // Not reached: the runtime call returns elsewhere.
   __ Unreachable();
 
+  // Reach here when generator is closed.
+  __ Bind(&closed_state);
+  if (resume_mode == JSGeneratorObject::NEXT) {
+    // Return completed iterator result when generator is closed.
+    __ LoadRoot(x10, Heap::kUndefinedValueRootIndex);
+    __ Push(x10);
+    // Pop value from top-of-stack slot; box result into result register.
+    EmitCreateIteratorResult(true);
+  } else {
+    // Throw the provided value.
+    __ Push(value_reg);
+    __ CallRuntime(Runtime::kThrow, 1);
+  }
+  __ B(&done);
+
   // Throw error if we attempt to operate on a running generator.
   __ Bind(&wrong_state);
   __ Push(generator_object);
   __ CallRuntime(Runtime::kThrowGeneratorStateError, 1);
 
   __ Bind(&done);
   context()->Plug(result_register());
 }
 
 
@@ skipping 285 matching lines @@
   return previous_;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64