Refactor BasicBlock, no inheritance from GenericNode

src/compiler/code-generator.cc

Index: src/compiler/code-generator.cc
diff --git a/src/compiler/code-generator.cc b/src/compiler/code-generator.cc
index f22c479780fb1a02ab0eb2108e63ba95ffd1b71f..6b8d7f022b69cbfb188e57175a6991c4a51ae085 100644
--- a/src/compiler/code-generator.cc
+++ b/src/compiler/code-generator.cc
@@ -107,7 +107,7 @@ void CodeGenerator::AssembleInstruction(Instruction* instr) {
     if (FLAG_code_comments) {
       // TODO(titzer): these code comments are a giant memory leak.
       Vector<char> buffer = Vector<char>::New(32);
-      SNPrintF(buffer, "-- B%d start --", block_start->block()->id());
+      SNPrintF(buffer, "-- B%d start --", block_start->block()->id().ToInt());
       masm()->RecordComment(buffer.start());
     }
     masm()->bind(block_start->label());