Add a stubbed-out implementation of FlowGraphCompiler for ia32 and arm.

runtime/vm/flow_graph_compiler_arm.h

+// 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.
+
+#ifndef VM_FLOW_GRAPH_COMPILER_ARM_H_
+#define VM_FLOW_GRAPH_COMPILER_ARM_H_
+
+#ifndef VM_FLOW_GRAPH_COMPILER_H_
+#error Include flow_graph_compiler.h instead of flow_graph_compiler_arm.h.
+#endif
+
+#include "vm/intermediate_language.h"
+
+namespace dart {
+
+class Assembler;
+class Code;
+template <typename T> class GrowableArray;
+class ParsedFunction;
+
+// Stubbed out implementation of graph compiler, bails out immediately if
+// CompileGraph is called. The rest of the public API is UNIMPLEMENTED.
+class FlowGraphCompiler : public InstructionVisitor {
+ public:
+  FlowGraphCompiler(Assembler* assembler,
+                    const ParsedFunction& parsed_function,
+                    const GrowableArray<BlockEntryInstr*>* blocks)
+      : parsed_function_(parsed_function) {
+  }
+
+  virtual ~FlowGraphCompiler() { }
+
+  void CompileGraph();
+
+  // Infrastructure copied from class CodeGenerator or stubbed out.
+  void FinalizePcDescriptors(const Code& code);
+  void FinalizeVarDescriptors(const Code& code);
+  void FinalizeExceptionHandlers(const Code& code);
+
+ private:
+  // Bail out of the flow graph compiler.  Does not return to the caller.
+  void Bailout(const char* reason);
+
+  const ParsedFunction& parsed_function_;
+
+  DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
+};
+
+}  // namespace dart
+
+#endif  // VM_FLOW_GRAPH_COMPILER_ARM_H_