VM: Re-format to use at most one newline between functions

runtime/vm/stub_code_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 78 matching lines @@
   // Mark that the thread is executing Dart code.
   __ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
 
   // Reset exit frame information in Isolate structure.
   __ movq(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
 
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 // Print the stop message.
 DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 1, const char* message) {
   OS::Print("Stop message: %s\n", message);
 }
 END_LEAF_RUNTIME_ENTRY
 
-
 // Input parameters:
 //   RSP : points to return address.
 //   RDI : stop message (const char*).
 // Must preserve all registers.
 void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
   __ EnterCallRuntimeFrame(0);
 // Call the runtime leaf function. RDI already contains the parameter.
 #if defined(_WIN64)
   __ movq(CallingConventions::kArg1Reg, RDI);
 #endif
   __ CallRuntime(kPrintStopMessageRuntimeEntry, 1);
   __ LeaveCallRuntimeFrame();
   __ ret();
 }
 
-
 // Input parameters:
 //   RSP : points to return address.
 //   RSP + 8 : address of return value.
 //   RAX : address of first argument in argument array.
 //   RBX : address of the native function to call.
 //   R10 : argc_tag including number of arguments and function kind.
 static void GenerateCallNativeWithWrapperStub(Assembler* assembler,
                                               Address wrapper_address) {
   const intptr_t native_args_struct_offset = 0;
   const intptr_t thread_offset =
@@ skipping 52 matching lines @@
   // Mark that the thread is executing Dart code.
   __ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
 
   // Reset exit frame information in Isolate structure.
   __ movq(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
 
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 void StubCode::GenerateCallNoScopeNativeStub(Assembler* assembler) {
   GenerateCallNativeWithWrapperStub(
       assembler,
       Address(THR, Thread::no_scope_native_wrapper_entry_point_offset()));
 }
 
-
 void StubCode::GenerateCallAutoScopeNativeStub(Assembler* assembler) {
   GenerateCallNativeWithWrapperStub(
       assembler,
       Address(THR, Thread::auto_scope_native_wrapper_entry_point_offset()));
 }
 
-
 // Input parameters:
 //   RSP : points to return address.
 //   RSP + 8 : address of return value.
 //   RAX : address of first argument in argument array.
 //   RBX : address of the native function to call.
 //   R10 : argc_tag including number of arguments and function kind.
 void StubCode::GenerateCallBootstrapNativeStub(Assembler* assembler) {
   const intptr_t native_args_struct_offset = 0;
   const intptr_t thread_offset =
       NativeArguments::thread_offset() + native_args_struct_offset;
@@ skipping 47 matching lines @@
   // Mark that the thread is executing Dart code.
   __ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
 
   // Reset exit frame information in Isolate structure.
   __ movq(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
 
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 // Input parameters:
 //   R10: arguments descriptor array.
 void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(R10);  // Preserve arguments descriptor array.
   // Setup space on stack for return value.
   __ pushq(Immediate(0));
   __ CallRuntime(kPatchStaticCallRuntimeEntry, 0);
   __ popq(CODE_REG);  // Get Code object result.
   __ popq(R10);       // Restore arguments descriptor array.
   // Remove the stub frame as we are about to jump to the dart function.
   __ LeaveStubFrame();
 
   __ movq(RBX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jmp(RBX);
 }
 
-
 // Called from a static call only when an invalid code has been entered
 // (invalid because its function was optimized or deoptimized).
 // R10: arguments descriptor array.
 void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
   // Load code pointer to this stub from the thread:
   // The one that is passed in, is not correct - it points to the code object
   // that needs to be replaced.
   __ movq(CODE_REG, Address(THR, Thread::fix_callers_target_code_offset()));
   __ EnterStubFrame();
   __ pushq(R10);  // Preserve arguments descriptor array.
   // Setup space on stack for return value.
   __ pushq(Immediate(0));
   __ CallRuntime(kFixCallersTargetRuntimeEntry, 0);
   __ popq(CODE_REG);  // Get Code object.
   __ popq(R10);       // Restore arguments descriptor array.
   __ movq(RAX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ LeaveStubFrame();
   __ jmp(RAX);
   __ int3();
 }
 
-
 // Called from object allocate instruction when the allocation stub has been
 // disabled.
 void StubCode::GenerateFixAllocationStubTargetStub(Assembler* assembler) {
   // Load code pointer to this stub from the thread:
   // The one that is passed in, is not correct - it points to the code object
   // that needs to be replaced.
   __ movq(CODE_REG, Address(THR, Thread::fix_allocation_stub_code_offset()));
   __ EnterStubFrame();
   // Setup space on stack for return value.
   __ pushq(Immediate(0));
   __ CallRuntime(kFixAllocationStubTargetRuntimeEntry, 0);
   __ popq(CODE_REG);  // Get Code object.
   __ movq(RAX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ LeaveStubFrame();
   __ jmp(RAX);
   __ int3();
 }
 
-
 // Input parameters:
 //   R10: smi-tagged argument count, may be zero.
 //   RBP[kParamEndSlotFromFp + 1]: last argument.
 static void PushArgumentsArray(Assembler* assembler) {
   __ LoadObject(R12, Object::null_object());
   // Allocate array to store arguments of caller.
   __ movq(RBX, R12);  // Null element type for raw Array.
   __ Call(*StubCode::AllocateArray_entry());
   __ SmiUntag(R10);
   // RAX: newly allocated array.
@@ skipping 14 matching lines @@
   __ movq(RDI, Address(R12, 0));
   // Generational barrier is needed, array is not necessarily in new space.
   __ StoreIntoObject(RAX, Address(RBX, 0), RDI);
   __ addq(RBX, Immediate(kWordSize));
   __ subq(R12, Immediate(kWordSize));
   __ Bind(&loop_condition);
   __ decq(R10);
   __ j(POSITIVE, &loop, Assembler::kNearJump);
 }
 
-
 // Used by eager and lazy deoptimization. Preserve result in RAX if necessary.
 // This stub translates optimized frame into unoptimized frame. The optimized
 // frame can contain values in registers and on stack, the unoptimized
 // frame contains all values on stack.
 // Deoptimization occurs in following steps:
 // - Push all registers that can contain values.
 // - Call C routine to copy the stack and saved registers into temporary buffer.
 // - Adjust caller's frame to correct unoptimized frame size.
 // - Fill the unoptimized frame.
 // - Materialize objects that require allocation (e.g. Double instances).
@@ skipping 127 matching lines @@
     __ popq(RAX);  // Restore exception.
   }
   __ LeaveStubFrame();
 
   __ popq(RCX);       // Pop return address.
   __ addq(RSP, RBX);  // Remove materialization arguments.
   __ pushq(RCX);      // Push return address.
   // The caller is responsible for emitting the return instruction.
 }
 
-
 // RAX: result, must be preserved
 void StubCode::GenerateDeoptimizeLazyFromReturnStub(Assembler* assembler) {
   // Push zap value instead of CODE_REG for lazy deopt.
   __ pushq(Immediate(kZapCodeReg));
   // Return address for "call" to deopt stub.
   __ pushq(Immediate(kZapReturnAddress));
   __ movq(CODE_REG, Address(THR, Thread::lazy_deopt_from_return_stub_offset()));
   GenerateDeoptimizationSequence(assembler, kLazyDeoptFromReturn);
   __ ret();
 }
 
-
 // RAX: exception, must be preserved
 // RDX: stacktrace, must be preserved
 void StubCode::GenerateDeoptimizeLazyFromThrowStub(Assembler* assembler) {
   // Push zap value instead of CODE_REG for lazy deopt.
   __ pushq(Immediate(kZapCodeReg));
   // Return address for "call" to deopt stub.
   __ pushq(Immediate(kZapReturnAddress));
   __ movq(CODE_REG, Address(THR, Thread::lazy_deopt_from_throw_stub_offset()));
   GenerateDeoptimizationSequence(assembler, kLazyDeoptFromThrow);
   __ ret();
 }
 
-
 void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
   GenerateDeoptimizationSequence(assembler, kEagerDeopt);
   __ ret();
 }
 
-
 static void GenerateDispatcherCode(Assembler* assembler,
                                    Label* call_target_function) {
   __ Comment("NoSuchMethodDispatch");
   // When lazily generated invocation dispatchers are disabled, the
   // miss-handler may return null.
   __ CompareObject(RAX, Object::null_object());
   __ j(NOT_EQUAL, call_target_function);
   __ EnterStubFrame();
   // Load the receiver.
   __ movq(RDI, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
@@ skipping 16 matching lines @@
   // R10: Smi-tagged arguments array length.
   PushArgumentsArray(assembler);
   const intptr_t kNumArgs = 4;
   __ CallRuntime(kInvokeNoSuchMethodDispatcherRuntimeEntry, kNumArgs);
   __ Drop(4);
   __ popq(RAX);  // Return value.
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
   __ EnterStubFrame();
   // Load the receiver into RAX.  The argument count in the arguments
   // descriptor in R10 is a smi.
   __ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
   // Three words (saved pp, saved fp, stub's pc marker)
   // in the stack above the return address.
   __ movq(RAX,
           Address(RSP, RAX, TIMES_4, kSavedAboveReturnAddress * kWordSize));
   // Preserve IC data and arguments descriptor.
@@ skipping 18 matching lines @@
   if (!FLAG_lazy_dispatchers) {
     Label call_target_function;
     GenerateDispatcherCode(assembler, &call_target_function);
     __ Bind(&call_target_function);
   }
   __ movq(CODE_REG, FieldAddress(RAX, Function::code_offset()));
   __ movq(RCX, FieldAddress(RAX, Function::entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 // Called for inline allocation of arrays.
 // Input parameters:
 //   R10 : Array length as Smi.
 //   RBX : array element type (either NULL or an instantiated type).
 // NOTE: R10 cannot be clobbered here as the caller relies on it being saved.
 // The newly allocated object is returned in RAX.
 void StubCode::GenerateAllocateArrayStub(Assembler* assembler) {
   Label slow_case;
   // Compute the size to be allocated, it is based on the array length
   // and is computed as:
@@ skipping 112 matching lines @@
   __ pushq(R10);  // Array length as Smi.
   __ pushq(RBX);  // Element type.
   __ CallRuntime(kAllocateArrayRuntimeEntry, 2);
   __ popq(RAX);  // Pop element type argument.
   __ popq(R10);  // Pop array length argument.
   __ popq(RAX);  // Pop return value from return slot.
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 // Called when invoking Dart code from C++ (VM code).
 // Input parameters:
 //   RSP : points to return address.
 //   RDI : target code
 //   RSI : arguments descriptor array.
 //   RDX : arguments array.
 //   RCX : current thread.
 void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
   // Save frame pointer coming in.
   __ EnterFrame(0);
@@ skipping 111 matching lines @@
   __ PopRegisters(CallingConventions::kCalleeSaveCpuRegisters,
                   CallingConventions::kCalleeSaveXmmRegisters);
   __ set_constant_pool_allowed(false);
 
   // Restore the frame pointer.
   __ LeaveFrame();
 
   __ ret();
 }
 
-
 // Called for inline allocation of contexts.
 // Input:
 // R10: number of context variables.
 // Output:
 // RAX: new allocated RawContext object.
 void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
   __ LoadObject(R9, Object::null_object());
   if (FLAG_inline_alloc) {
     Label slow_case;
     // First compute the rounded instance size.
@@ skipping 109 matching lines @@
   __ pushq(R10);  // Push number of context variables.
   __ CallRuntime(kAllocateContextRuntimeEntry, 1);  // Allocate context.
   __ popq(RAX);  // Pop number of context variables argument.
   __ popq(RAX);  // Pop the new context object.
   // RAX: new object
   // Restore the frame pointer.
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 // Helper stub to implement Assembler::StoreIntoObject.
 // Input parameters:
 //   RDX: Address being stored
 void StubCode::GenerateUpdateStoreBufferStub(Assembler* assembler) {
   // Save registers being destroyed.
   __ pushq(RAX);
   __ pushq(RCX);
 
   Label add_to_buffer;
   // Check whether this object has already been remembered. Skip adding to the
@@ skipping 44 matching lines @@
   // Handle overflow: Call the runtime leaf function.
   __ Bind(&L);
   // Setup frame, push callee-saved registers.
   __ EnterCallRuntimeFrame(0);
   __ movq(CallingConventions::kArg1Reg, THR);
   __ CallRuntime(kStoreBufferBlockProcessRuntimeEntry, 1);
   __ LeaveCallRuntimeFrame();
   __ ret();
 }
 
-
 // Called for inline allocation of objects.
 // Input parameters:
 //   RSP + 8 : type arguments object (only if class is parameterized).
 //   RSP : points to return address.
 void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
                                               const Class& cls) {
   const intptr_t kObjectTypeArgumentsOffset = 1 * kWordSize;
   // The generated code is different if the class is parameterized.
   const bool is_cls_parameterized = cls.NumTypeArguments() > 0;
   ASSERT(!is_cls_parameterized ||
@@ skipping 107 matching lines @@
   __ CallRuntime(kAllocateObjectRuntimeEntry, 2);  // Allocate object.
   __ popq(RAX);  // Pop argument (type arguments of object).
   __ popq(RAX);  // Pop argument (class of object).
   __ popq(RAX);  // Pop result (newly allocated object).
   // RAX: new object
   // Restore the frame pointer.
   __ LeaveStubFrame();
   __ ret();
 }
 
-
 // Called for invoking "dynamic noSuchMethod(Invocation invocation)" function
 // from the entry code of a dart function after an error in passed argument
 // name or number is detected.
 // Input parameters:
 //   RSP : points to return address.
 //   RSP + 8 : address of last argument.
 //   R10 : arguments descriptor array.
 void StubCode::GenerateCallClosureNoSuchMethodStub(Assembler* assembler) {
   __ EnterStubFrame();
 
@@ skipping 16 matching lines @@
 
   // R10: Smi-tagged arguments array length.
   PushArgumentsArray(assembler);
 
   const intptr_t kNumArgs = 3;
   __ CallRuntime(kInvokeClosureNoSuchMethodRuntimeEntry, kNumArgs);
   // noSuchMethod on closures always throws an error, so it will never return.
   __ int3();
 }
 
-
 // Cannot use function object from ICData as it may be the inlined
 // function and not the top-scope function.
 void StubCode::GenerateOptimizedUsageCounterIncrement(Assembler* assembler) {
   Register ic_reg = RBX;
   Register func_reg = RDI;
   if (FLAG_trace_optimized_ic_calls) {
     __ EnterStubFrame();
     __ pushq(func_reg);  // Preserve
     __ pushq(ic_reg);    // Preserve.
     __ pushq(ic_reg);    // Argument.
     __ pushq(func_reg);  // Argument.
     __ CallRuntime(kTraceICCallRuntimeEntry, 2);
     __ popq(RAX);       // Discard argument;
     __ popq(RAX);       // Discard argument;
     __ popq(ic_reg);    // Restore.
     __ popq(func_reg);  // Restore.
     __ LeaveStubFrame();
   }
   __ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
 }
 
-
 // Loads function into 'temp_reg', preserves 'ic_reg'.
 void StubCode::GenerateUsageCounterIncrement(Assembler* assembler,
                                              Register temp_reg) {
   if (FLAG_optimization_counter_threshold >= 0) {
     Register ic_reg = RBX;
     Register func_reg = temp_reg;
     ASSERT(ic_reg != func_reg);
     __ Comment("Increment function counter");
     __ movq(func_reg, FieldAddress(ic_reg, ICData::owner_offset()));
     __ incl(FieldAddress(func_reg, Function::usage_counter_offset()));
   }
 }
 
-
 // Note: RBX must be preserved.
 // Attempt a quick Smi operation for known operations ('kind'). The ICData
 // must have been primed with a Smi/Smi check that will be used for counting
 // the invocations.
 static void EmitFastSmiOp(Assembler* assembler,
                           Token::Kind kind,
                           intptr_t num_args,
                           Label* not_smi_or_overflow) {
   __ Comment("Fast Smi op");
   ASSERT(num_args == 2);
@@ skipping 50 matching lines @@
 
   if (FLAG_optimization_counter_threshold >= 0) {
     const intptr_t count_offset = ICData::CountIndexFor(num_args) * kWordSize;
     // Update counter, ignore overflow.
     __ addq(Address(R13, count_offset), Immediate(Smi::RawValue(1)));
   }
 
   __ ret();
 }
 
-
 // Generate inline cache check for 'num_args'.
 //  RBX: Inline cache data object.
 //  TOS(0): return address
 // Control flow:
 // - If receiver is null -> jump to IC miss.
 // - If receiver is Smi -> load Smi class.
 // - If receiver is not-Smi -> load receiver's class.
 // - Check if 'num_args' (including receiver) match any IC data group.
 // - Match found -> jump to target.
 // - Match not found -> jump to IC miss.
@@ skipping 147 matching lines @@
     __ EnterStubFrame();
     __ pushq(RBX);
     __ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
     __ popq(RBX);
     __ RestoreCodePointer();
     __ LeaveStubFrame();
     __ jmp(&done_stepping);
   }
 }
 
-
 // Use inline cache data array to invoke the target or continue in inline
 // cache miss handler. Stub for 1-argument check (receiver class).
 //  RBX: Inline cache data object.
 //  TOS(0): Return address.
 // Inline cache data object structure:
 // 0: function-name
 // 1: N, number of arguments checked.
 // 2 .. (length - 1): group of checks, each check containing:
 //   - N classes.
 //   - 1 target function.
 void StubCode::GenerateOneArgCheckInlineCacheStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry, Token::kILLEGAL);
 }
 
-
 void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(assembler, 2,
                                     kInlineCacheMissHandlerTwoArgsRuntimeEntry,
                                     Token::kILLEGAL);
 }
 
-
 void StubCode::GenerateSmiAddInlineCacheStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kADD);
 }
 
-
 void StubCode::GenerateSmiSubInlineCacheStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kSUB);
 }
 
-
 void StubCode::GenerateSmiEqualInlineCacheStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 2, kInlineCacheMissHandlerTwoArgsRuntimeEntry, Token::kEQ);
 }
 
-
 // Use inline cache data array to invoke the target or continue in inline
 // cache miss handler. Stub for 1-argument check (receiver class).
 //  RDI: function which counter needs to be incremented.
 //  RBX: Inline cache data object.
 //  TOS(0): Return address.
 // Inline cache data object structure:
 // 0: function-name
 // 1: N, number of arguments checked.
 // 2 .. (length - 1): group of checks, each check containing:
 //   - N classes.
 //   - 1 target function.
 void StubCode::GenerateOneArgOptimizedCheckInlineCacheStub(
     Assembler* assembler) {
   GenerateOptimizedUsageCounterIncrement(assembler);
   GenerateNArgsCheckInlineCacheStub(assembler, 1,
                                     kInlineCacheMissHandlerOneArgRuntimeEntry,
                                     Token::kILLEGAL, true /* optimized */);
 }
 
-
 void StubCode::GenerateTwoArgsOptimizedCheckInlineCacheStub(
     Assembler* assembler) {
   GenerateOptimizedUsageCounterIncrement(assembler);
   GenerateNArgsCheckInlineCacheStub(assembler, 2,
                                     kInlineCacheMissHandlerTwoArgsRuntimeEntry,
                                     Token::kILLEGAL, true /* optimized */);
 }
 
-
 // Intermediary stub between a static call and its target. ICData contains
 // the target function and the call count.
 // RBX: ICData
 void StubCode::GenerateZeroArgsUnoptimizedStaticCallStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
 #if defined(DEBUG)
   {
     Label ok;
     // Check that the IC data array has NumArgsTested() == 0.
     // 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
@@ skipping 49 matching lines @@
     __ EnterStubFrame();
     __ pushq(RBX);  // Preserve IC data object.
     __ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
     __ popq(RBX);
     __ RestoreCodePointer();
     __ LeaveStubFrame();
     __ jmp(&done_stepping, Assembler::kNearJump);
   }
 }
 
-
 void StubCode::GenerateOneArgUnoptimizedStaticCallStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 1, kStaticCallMissHandlerOneArgRuntimeEntry, Token::kILLEGAL);
 }
 
-
 void StubCode::GenerateTwoArgsUnoptimizedStaticCallStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, RCX);
   GenerateNArgsCheckInlineCacheStub(
       assembler, 2, kStaticCallMissHandlerTwoArgsRuntimeEntry, Token::kILLEGAL);
 }
 
-
 // Stub for compiling a function and jumping to the compiled code.
 // RCX: IC-Data (for methods).
 // R10: Arguments descriptor.
 // RAX: Function.
 void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(R10);  // Preserve arguments descriptor array.
   __ pushq(RBX);  // Preserve IC data object.
   __ pushq(RAX);  // Pass function.
   __ CallRuntime(kCompileFunctionRuntimeEntry, 1);
   __ popq(RAX);  // Restore function.
   __ popq(RBX);  // Restore IC data array.
   __ popq(R10);  // Restore arguments descriptor array.
   __ LeaveStubFrame();
 
   __ movq(CODE_REG, FieldAddress(RAX, Function::code_offset()));
   __ movq(RAX, FieldAddress(RAX, Function::entry_point_offset()));
   __ jmp(RAX);
 }
 
-
 // RBX: Contains an ICData.
 // TOS(0): return address (Dart code).
 void StubCode::GenerateICCallBreakpointStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(RBX);           // Preserve IC data.
   __ pushq(Immediate(0));  // Result slot.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ popq(CODE_REG);  // Original stub.
   __ popq(RBX);       // Restore IC data.
   __ LeaveStubFrame();
 
   __ movq(RAX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jmp(RAX);  // Jump to original stub.
 }
 
-
 //  TOS(0): return address (Dart code).
 void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(Immediate(0));  // Result slot.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ popq(CODE_REG);  // Original stub.
   __ LeaveStubFrame();
 
   __ movq(RAX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jmp(RAX);  // Jump to original stub.
 }
 
-
 // Called only from unoptimized code.
 void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) {
   // Check single stepping.
   Label stepping, done_stepping;
   __ LoadIsolate(RAX);
   __ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
   __ cmpq(RAX, Immediate(0));
   __ j(NOT_EQUAL, &stepping, Assembler::kNearJump);
   __ Bind(&done_stepping);
   __ ret();
 
   __ Bind(&stepping);
   __ EnterStubFrame();
   __ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
   __ LeaveStubFrame();
   __ jmp(&done_stepping, Assembler::kNearJump);
 }
 
-
 // Used to check class and type arguments. Arguments passed on stack:
 // TOS + 0: return address.
 // TOS + 1: function type arguments (only if n == 4, can be raw_null).
 // TOS + 2: instantiator type arguments (only if n == 4, can be raw_null).
 // TOS + 3: instance.
 // TOS + 4: SubtypeTestCache.
 // Result in RCX: null -> not found, otherwise result (true or false).
 static void GenerateSubtypeNTestCacheStub(Assembler* assembler, int n) {
   ASSERT((n == 1) || (n == 2) || (n == 4));
   const intptr_t kFunctionTypeArgumentsInBytes = 1 * kWordSize;
@@ skipping 71 matching lines @@
   // Fall through to not found.
   __ Bind(&not_found);
   __ movq(RCX, R9);
   __ ret();
 
   __ Bind(&found);
   __ movq(RCX, Address(RDX, kWordSize * SubtypeTestCache::kTestResult));
   __ ret();
 }
 
-
 // Used to check class and type arguments. Arguments passed on stack:
 // TOS + 0: return address.
 // TOS + 1: raw_null.
 // TOS + 2: raw_null.
 // TOS + 3: instance.
 // TOS + 4: SubtypeTestCache.
 // Result in RCX: null -> not found, otherwise result (true or false).
 void StubCode::GenerateSubtype1TestCacheStub(Assembler* assembler) {
   GenerateSubtypeNTestCacheStub(assembler, 1);
 }
 
-
 // Used to check class and type arguments. Arguments passed on stack:
 // TOS + 0: return address.
 // TOS + 1: raw_null.
 // TOS + 2: raw_null.
 // TOS + 3: instance.
 // TOS + 4: SubtypeTestCache.
 // Result in RCX: null -> not found, otherwise result (true or false).
 void StubCode::GenerateSubtype2TestCacheStub(Assembler* assembler) {
   GenerateSubtypeNTestCacheStub(assembler, 2);
 }
 
-
 // Used to check class and type arguments. Arguments passed on stack:
 // TOS + 0: return address.
 // TOS + 1: function type arguments (can be raw_null).
 // TOS + 2: instantiator type arguments (can be raw_null).
 // TOS + 3: instance.
 // TOS + 4: SubtypeTestCache.
 // Result in RCX: null -> not found, otherwise result (true or false).
 void StubCode::GenerateSubtype4TestCacheStub(Assembler* assembler) {
   GenerateSubtypeNTestCacheStub(assembler, 4);
 }
 
-
 // Return the current stack pointer address, used to stack alignment
 // checks.
 // TOS + 0: return address
 // Result in RAX.
 void StubCode::GenerateGetCStackPointerStub(Assembler* assembler) {
   __ leaq(RAX, Address(RSP, kWordSize));
   __ ret();
 }
 
-
 // Jump to a frame on the call stack.
 // TOS + 0: return address
 // Arg1: program counter
 // Arg2: stack pointer
 // Arg3: frame_pointer
 // Arg4: thread
 // No Result.
 void StubCode::GenerateJumpToFrameStub(Assembler* assembler) {
   __ movq(THR, CallingConventions::kArg4Reg);
   __ movq(RBP, CallingConventions::kArg3Reg);
   __ movq(RSP, CallingConventions::kArg2Reg);
   // Set the tag.
   __ movq(Assembler::VMTagAddress(), Immediate(VMTag::kDartTagId));
   // Clear top exit frame.
   __ movq(Address(THR, Thread::top_exit_frame_info_offset()), Immediate(0));
   // Restore the pool pointer.
   __ RestoreCodePointer();
   __ LoadPoolPointer(PP);
   __ jmp(CallingConventions::kArg1Reg);  // Jump to program counter.
 }
 
-
 // Run an exception handler.  Execution comes from JumpToFrame stub.
 //
 // The arguments are stored in the Thread object.
 // No result.
 void StubCode::GenerateRunExceptionHandlerStub(Assembler* assembler) {
   ASSERT(kExceptionObjectReg == RAX);
   ASSERT(kStackTraceObjectReg == RDX);
   __ movq(CallingConventions::kArg1Reg,
           Address(THR, Thread::resume_pc_offset()));
 
   // Load the exception from the current thread.
   Address exception_addr(THR, Thread::active_exception_offset());
   __ movq(kExceptionObjectReg, exception_addr);
   __ movq(exception_addr, Immediate(0));
 
   // Load the stacktrace from the current thread.
   Address stacktrace_addr(THR, Thread::active_stacktrace_offset());
   __ movq(kStackTraceObjectReg, stacktrace_addr);
   __ movq(stacktrace_addr, Immediate(0));
 
   __ jmp(CallingConventions::kArg1Reg);  // Jump to continuation point.
 }
 
-
 // Deoptimize a frame on the call stack before rewinding.
 // The arguments are stored in the Thread object.
 // No result.
 void StubCode::GenerateDeoptForRewindStub(Assembler* assembler) {
   // Push zap value instead of CODE_REG.
   __ pushq(Immediate(kZapCodeReg));
 
   // Push the deopt pc.
   __ pushq(Address(THR, Thread::resume_pc_offset()));
   GenerateDeoptimizationSequence(assembler, kEagerDeopt);
 
   // After we have deoptimized, jump to the correct frame.
   __ EnterStubFrame();
   __ CallRuntime(kRewindPostDeoptRuntimeEntry, 0);
   __ LeaveStubFrame();
   __ int3();
 }
 
-
 // Calls to the runtime to optimize the given function.
 // RDI: function to be reoptimized.
 // R10: argument descriptor (preserved).
 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(R10);           // Preserve args descriptor.
   __ pushq(Immediate(0));  // Result slot.
   __ pushq(RDI);           // Arg0: function to optimize
   __ CallRuntime(kOptimizeInvokedFunctionRuntimeEntry, 1);
   __ popq(RAX);  // Discard argument.
   __ popq(RAX);  // Get Code object.
   __ popq(R10);  // Restore argument descriptor.
   __ LeaveStubFrame();
   __ movq(CODE_REG, FieldAddress(RAX, Function::code_offset()));
   __ movq(RCX, FieldAddress(RAX, Function::entry_point_offset()));
   __ jmp(RCX);
   __ int3();
 }
 
-
 // Does identical check (object references are equal or not equal) with special
 // checks for boxed numbers.
 // Left and right are pushed on stack.
 // Return ZF set.
 // Note: A Mint cannot contain a value that would fit in Smi, a Bigint
 // cannot contain a value that fits in Mint or Smi.
 static void GenerateIdenticalWithNumberCheckStub(Assembler* assembler,
                                                  const Register left,
                                                  const Register right) {
   Label reference_compare, done, check_mint, check_bigint;
@@ skipping 36 matching lines @@
   // Result in RAX, 0 means equal.
   __ LeaveStubFrame();
   __ cmpq(RAX, Immediate(0));
   __ jmp(&done);
 
   __ Bind(&reference_compare);
   __ cmpq(left, right);
   __ Bind(&done);
 }
 
-
 // Called only from unoptimized code. All relevant registers have been saved.
 // TOS + 0: return address
 // TOS + 1: right argument.
 // TOS + 2: left argument.
 // Returns ZF set.
 void StubCode::GenerateUnoptimizedIdenticalWithNumberCheckStub(
     Assembler* assembler) {
   // Check single stepping.
   Label stepping, done_stepping;
   if (FLAG_support_debugger) {
@@ skipping 15 matching lines @@
   if (FLAG_support_debugger) {
     __ Bind(&stepping);
     __ EnterStubFrame();
     __ CallRuntime(kSingleStepHandlerRuntimeEntry, 0);
     __ RestoreCodePointer();
     __ LeaveStubFrame();
     __ jmp(&done_stepping);
   }
 }
 
-
 // Called from optimized code only.
 // TOS + 0: return address
 // TOS + 1: right argument.
 // TOS + 2: left argument.
 // Returns ZF set.
 void StubCode::GenerateOptimizedIdenticalWithNumberCheckStub(
     Assembler* assembler) {
   const Register left = RAX;
   const Register right = RDX;
 
   __ movq(left, Address(RSP, 2 * kWordSize));
   __ movq(right, Address(RSP, 1 * kWordSize));
   GenerateIdenticalWithNumberCheckStub(assembler, left, right);
   __ ret();
 }
 
-
 // Called from megamorphic calls.
 //  RDI: receiver
 //  RBX: MegamorphicCache (preserved)
 // Passed to target:
 //  CODE_REG: target Code
 //  R10: arguments descriptor
 void StubCode::GenerateMegamorphicCallStub(Assembler* assembler) {
   // Jump if receiver is a smi.
   Label smi_case;
   __ testq(RDI, Immediate(kSmiTagMask));
@@ skipping 50 matching lines @@
   // Try next entry in the table.
   __ AddImmediate(RCX, Immediate(Smi::RawValue(1)));
   __ jmp(&loop);
 
   // Load cid for the Smi case.
   __ Bind(&smi_case);
   __ movq(RAX, Immediate(kSmiCid));
   __ jmp(&cid_loaded);
 }
 
-
 // Called from switchable IC calls.
 //  RDI: receiver
 //  RBX: ICData (preserved)
 // Passed to target:
 //  CODE_REG: target Code object
 //  R10: arguments descriptor
 void StubCode::GenerateICCallThroughFunctionStub(Assembler* assembler) {
   Label loop, found, miss;
   __ movq(R13, FieldAddress(RBX, ICData::ic_data_offset()));
   __ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset()));
@@ skipping 22 matching lines @@
   __ movq(CODE_REG, FieldAddress(RAX, Function::code_offset()));
   __ jmp(RCX);
 
   __ Bind(&miss);
   __ LoadIsolate(RAX);
   __ movq(CODE_REG, Address(RAX, Isolate::ic_miss_code_offset()));
   __ movq(RCX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 void StubCode::GenerateICCallThroughCodeStub(Assembler* assembler) {
   Label loop, found, miss;
   __ movq(R13, FieldAddress(RBX, ICData::ic_data_offset()));
   __ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset()));
   __ leaq(R13, FieldAddress(R13, Array::data_offset()));
   // R13: first IC entry
   __ LoadTaggedClassIdMayBeSmi(RAX, RDI);
   // RAX: receiver cid as Smi
 
   __ Bind(&loop);
@@ skipping 16 matching lines @@
   __ movq(CODE_REG, Address(R13, code_offset));
   __ jmp(RCX);
 
   __ Bind(&miss);
   __ LoadIsolate(RAX);
   __ movq(CODE_REG, Address(RAX, Isolate::ic_miss_code_offset()));
   __ movq(RCX, FieldAddress(CODE_REG, Code::entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 //  RDI: receiver
 //  RBX: UnlinkedCall
 void StubCode::GenerateUnlinkedCallStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ pushq(RDI);  // Preserve receiver.
 
   __ pushq(Immediate(0));  // Result slot.
   __ pushq(RDI);           // Arg0: Receiver
   __ pushq(RBX);           // Arg1: UnlinkedCall
   __ CallRuntime(kUnlinkedCallRuntimeEntry, 2);
   __ popq(RBX);
   __ popq(RBX);
   __ popq(RBX);  // result = IC
 
   __ popq(RDI);  // Restore receiver.
   __ LeaveStubFrame();
 
   __ movq(CODE_REG, Address(THR, Thread::ic_lookup_through_code_stub_offset()));
   __ movq(RCX, FieldAddress(CODE_REG, Code::checked_entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 // Called from switchable IC calls.
 //  RDI: receiver
 //  RBX: SingleTargetCache
 // Passed to target::
 //  CODE_REG: target Code object
 void StubCode::GenerateSingleTargetCallStub(Assembler* assembler) {
   Label miss;
   __ LoadClassIdMayBeSmi(RAX, RDI);
   __ movzxw(R9, FieldAddress(RBX, SingleTargetCache::lower_limit_offset()));
   __ movzxw(R10, FieldAddress(RBX, SingleTargetCache::upper_limit_offset()));
@@ skipping 16 matching lines @@
   __ popq(RBX);  // result = IC
 
   __ popq(RDI);  // Restore receiver.
   __ LeaveStubFrame();
 
   __ movq(CODE_REG, Address(THR, Thread::ic_lookup_through_code_stub_offset()));
   __ movq(RCX, FieldAddress(CODE_REG, Code::checked_entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 // Called from the monomorphic checked entry.
 //  RDI: receiver
 void StubCode::GenerateMonomorphicMissStub(Assembler* assembler) {
   __ movq(CODE_REG, Address(THR, Thread::monomorphic_miss_stub_offset()));
   __ EnterStubFrame();
   __ pushq(RDI);  // Preserve receiver.
 
   __ pushq(Immediate(0));  // Result slot.
   __ pushq(RDI);           // Arg0: Receiver
   __ CallRuntime(kMonomorphicMissRuntimeEntry, 1);
   __ popq(RBX);
   __ popq(RBX);  // result = IC
 
   __ popq(RDI);  // Restore receiver.
   __ LeaveStubFrame();
 
   __ movq(CODE_REG, Address(THR, Thread::ic_lookup_through_code_stub_offset()));
   __ movq(RCX, FieldAddress(CODE_REG, Code::checked_entry_point_offset()));
   __ jmp(RCX);
 }
 
-
 void StubCode::GenerateFrameAwaitingMaterializationStub(Assembler* assembler) {
   __ int3();
 }
 
-
 void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
   __ int3();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64