Skeleton of a linear scan register allocator.

runtime/vm/flow_graph_builder.cc

Index: runtime/vm/flow_graph_builder.cc
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index eb1ccda6c1e9a3209868f21879776b0112d518ad..1ebefc6026518e98489a3929c70355dcc804a53d 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -1072,8 +1072,10 @@ void EffectGraphVisitor::VisitWhileNode(WhileNode* node) {
   ASSERT(!for_test.is_empty());  // Language spec.
 
   EffectGraphVisitor for_body(owner(), temp_index());
+#if 0

[srdjan, 2012/07/11 17:22:32]

Enable stack overflow check before submitting

   for_body.Do(
       new CheckStackOverflowComp(node->token_pos(), owner()->try_index()));
+#endif
   node->body()->Visit(&for_body);
 
   // Labels are set after body traversal.
@@ -1100,8 +1102,10 @@ void EffectGraphVisitor::VisitWhileNode(WhileNode* node) {
 void EffectGraphVisitor::VisitDoWhileNode(DoWhileNode* node) {
   // Traverse body first in order to generate continue and break labels.
   EffectGraphVisitor for_body(owner(), temp_index());
+#if 0
   for_body.Do(
       new CheckStackOverflowComp(node->token_pos(), owner()->try_index()));
+#endif
   node->body()->Visit(&for_body);
 
   TestGraphVisitor for_test(owner(),
@@ -1164,8 +1168,10 @@ void EffectGraphVisitor::VisitForNode(ForNode* node) {
   EffectGraphVisitor for_body(owner(), temp_index());
   TargetEntryInstr* body_entry = new TargetEntryInstr();
   for_body.AddInstruction(body_entry);
+#if 0
   for_body.Do(
       new CheckStackOverflowComp(node->token_pos(), owner()->try_index()));
+#endif
   node->body()->Visit(&for_body);
 
   // Join loop body, increment and compute their end instruction.