Add PC descriptor for ret instruction

runtime/vm/code_generator_x64.cc

 // Copyright (c) 2012, 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"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/code_generator.h"
 
 #include "lib/error.h"
@@ skipping 738 matching lines @@
   __ cmpq(RSP, Address(TMP, 0));
   Label no_stack_overflow;
   __ j(ABOVE, &no_stack_overflow);
   GenerateCallRuntime(AstNode::kNoId,
                       function.token_index(),
                       kStackOverflowRuntimeEntry);
   __ Bind(&no_stack_overflow);
 }
 
 
-void CodeGenerator::GenerateReturnEpilog() {
+void CodeGenerator::GenerateReturnEpilog(ReturnNode* node) {
   // Unchain the context(s) up to context level 0.
   int context_level = state()->context_level();
   ASSERT(context_level >= 0);
   while (context_level-- > 0) {
     __ movq(CTX, FieldAddress(CTX, Context::parent_offset()));
   }
 #ifdef DEBUG
   // Check that the entry stack size matches the exit stack size.
   __ movq(R10, RBP);
   __ subq(R10, RSP);
@@ skipping 10 matching lines @@
     __ LoadObject(RBX, function);
     __ pushq(RBX);
     GenerateCallRuntime(AstNode::kNoId,
                         0,
                         kTraceFunctionExitRuntimeEntry);
     __ popq(RAX);  // Remove argument.
     __ popq(RAX);  // Restore result.
   }
   __ LeaveFrame();
   __ ret();
+  // TODO(hausner): insert generation of of PcDescriptor::kReturn,
+  // analogous to 32bit version.
 
 #ifdef DEBUG
   __ Bind(&wrong_stack);
   __ Stop("Exit stack size does not match the entry stack size.");
 #endif  // DEBUG.
 }
 
 
 void CodeGenerator::VisitReturnNode(ReturnNode* node) {
   ASSERT(!IsResultNeeded(node));
@@ skipping 29 matching lines @@
     // Implicit getters do not need a type check at return.
     if ((kind != RawFunction::kImplicitGetter) &&
         (kind != RawFunction::kConstImplicitGetter)) {
       GenerateAssertAssignable(
           node->id(),
           node->value()->token_index(),
           AbstractType::ZoneHandle(parsed_function().function().result_type()),
           String::ZoneHandle(String::NewSymbol("function result")));
     }
   }
-  GenerateReturnEpilog();
+  GenerateReturnEpilog(node);
 }
 
 
 void CodeGenerator::VisitLiteralNode(LiteralNode* node) {
   if (!IsResultNeeded(node)) return;
   __ PushObject(node->literal());
 }
 
 
 void CodeGenerator::VisitTypeNode(TypeNode* node) {
@@ skipping 1939 matching lines @@
   const Error& error = Error::Handle(
       Parser::FormatError(script, token_index, "Error", format, args));
   va_end(args);
   Isolate::Current()->long_jump_base()->Jump(1, error);
   UNREACHABLE();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64