Initial implementation of a flow-graph builder for Dart's AST.

runtime/vm/code_generator_ia32.cc

Index: runtime/vm/code_generator_ia32.cc
diff --git a/runtime/vm/code_generator_ia32.cc b/runtime/vm/code_generator_ia32.cc
index b2110373e95d0cc60d626a9792497cb9989f7873..b7c17df0376e2da80a1c2dc7583d79991d41a111 100644
--- a/runtime/vm/code_generator_ia32.cc
+++ b/runtime/vm/code_generator_ia32.cc
@@ -12,6 +12,7 @@
 #include "vm/class_finalizer.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
+#include "vm/flow_graph_builder.h"
 #include "vm/ic_data.h"
 #include "vm/longjump.h"
 #include "vm/object.h"
@@ -202,6 +203,9 @@ bool CodeGenerator::IsResultNeeded(AstNode* node) const {
 // NOTE: First 5 bytes of the code may be patched with a jump instruction. Do
 // not emit any objects in the first 5 bytes.
 void CodeGenerator::GenerateCode() {
+  FlowGraphBuilder graph_builder(parsed_function());
+  graph_builder.BuildGraph();

[srdjan, 2012/02/16 14:14:34]

You want to decouple FlowGraphBuilder from old compiler/codegenerator. I suggest
moving it to compiler.cc, function CompileFunctionHelper and use a flag to turn
it on/off.

[Kevin Millikin (Google), 2012/02/20 14:50:19]

Done.

+
   CodeGeneratorState codegen_state(this);
   if (FLAG_print_scopes && FLAG_print_ast) {
     // Print the function scope before code generation.