[turbofan] Deferred blocks splintering.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index e7725799233cbb63136c4bc73473c440d7463f95..e30e0f85a115174b3f10340fd3b323be07b1e5fb 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -2928,9 +2928,7 @@ void AstGraphBuilder::VisitInScope(Statement* stmt, Scope* s, Node* context) {
 void AstGraphBuilder::VisitIterationBody(IterationStatement* stmt,
                                          LoopBuilder* loop) {
   ControlScopeForIteration scope(this, stmt, loop);
-  // TODO(mstarzinger): For now we only allow to interrupt non-asm.js code,
-  // which is a gigantic hack and should be extended to all code at some point.
-  if (!info()->shared_info()->asm_function()) {
+  if (FLAG_turbo_loop_stackcheck) {
     Node* node = NewNode(javascript()->StackCheck());
     PrepareFrameState(node, stmt->StackCheckId());
   }