Initial steps into streaming the kernel flowgraph

runtime/vm/kernel_to_il.h

 // Copyright (c) 2016, 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.
 
 #ifndef RUNTIME_VM_KERNEL_TO_IL_H_
 #define RUNTIME_VM_KERNEL_TO_IL_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/growable_array.h"
 #include "vm/hash_map.h"
 
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/intermediate_language.h"
 #include "vm/kernel.h"
 
 namespace dart {
 namespace kernel {
 
+class StreamingFlowGraphBuilder;
+
 // TODO(27590): Instead of using [dart::kernel::TreeNode]s as keys we
 // should use [TokenPosition]s.
 class KernelConstMapKeyEqualsTraits {
  public:
   static const char* Name() { return "KernelConstMapKeyEqualsTraits"; }
   static bool ReportStats() { return false; }
 
   static bool IsMatch(const Object& a, const Object& b) {
     const Smi& key1 = Smi::Cast(a);
     const Smi& key2 = Smi::Cast(b);
@@ skipping 699 matching lines @@
   DartTypeTranslator type_translator_;
 
   FunctionNode* current_function_node_;
   LocalScope* current_function_scope_;
   LocalScope* scope_;
   DepthState depth_;
 
   intptr_t name_index_;
 };
 
-
 class FlowGraphBuilder : public ExpressionVisitor, public StatementVisitor {
  public:
   FlowGraphBuilder(TreeNode* node,
                    ParsedFunction* parsed_function,
                    const ZoneGrowableArray<const ICData*>& ic_data_array,
                    InlineExitCollector* exit_collector,
                    intptr_t osr_id,
                    intptr_t first_block_id = 1);
   virtual ~FlowGraphBuilder();
 
@@ skipping 309 matching lines @@
   intptr_t next_used_try_index_;
 
   // A chained list of catch blocks. Chaining and lookup is done by the
   // [CatchBlock] class.
   CatchBlock* catch_block_;
 
   ActiveClass active_class_;
   DartTypeTranslator type_translator_;
   ConstantEvaluator constant_evaluator_;
 
+  StreamingFlowGraphBuilder* streaming_flow_graph_builder_;
+
   friend class BreakableBlock;
   friend class CatchBlock;
   friend class ConstantEvaluator;
   friend class DartTypeTranslator;
+  friend class StreamingFlowGraphBuilder;
   friend class ScopeBuilder;
   friend class SwitchBlock;
   friend class TryCatchBlock;
   friend class TryFinallyBlock;
 };
 
+
+class CatchBlock {
+ public:
+  CatchBlock(FlowGraphBuilder* builder,
+             LocalVariable* exception_var,
+             LocalVariable* stack_trace_var,
+             intptr_t catch_try_index)
+      : builder_(builder),
+        outer_(builder->catch_block_),
+        exception_var_(exception_var),
+        stack_trace_var_(stack_trace_var),
+        catch_try_index_(catch_try_index) {
+    builder_->catch_block_ = this;
+  }
+  ~CatchBlock() { builder_->catch_block_ = outer_; }
+
+  LocalVariable* exception_var() { return exception_var_; }
+  LocalVariable* stack_trace_var() { return stack_trace_var_; }
+  intptr_t catch_try_index() { return catch_try_index_; }
+
+ private:
+  FlowGraphBuilder* builder_;
+  CatchBlock* outer_;
+  LocalVariable* exception_var_;
+  LocalVariable* stack_trace_var_;
+  intptr_t catch_try_index_;
+};
+
+
 RawObject* EvaluateMetadata(TreeNode* const kernel_node);
 RawObject* BuildParameterDescriptor(TreeNode* const kernel_node);
 
 
 }  // namespace kernel
 }  // namespace dart
 
 #else  // !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/object.h"
 #include "vm/kernel.h"
 
 namespace dart {
 namespace kernel {
 
 RawObject* EvaluateMetadata(TreeNode* const kernel_node);
 RawObject* BuildParameterDescriptor(TreeNode* const kernel_node);
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_TO_IL_H_