[turbofan] Turn slow case for stack check into deferred code.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/687473002

Cr-Commit-Position: refs/heads/master@{#24918}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24918 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/ast-graph-builder.cc

@@ -2113,7 +2113,7 @@ Node* AstGraphBuilder::BuildStackCheck() {
               jsgraph()->ZeroConstant());
   Node* stack = NewNode(jsgraph()->machine()->LoadStackPointer());
   Node* tag = NewNode(jsgraph()->machine()->UintLessThan(), limit, stack);
-  stack_check.If(tag);
+  stack_check.If(tag, BranchHint::kTrue);
   stack_check.Then();
   stack_check.Else();
   Node* guard = NewNode(javascript()->CallRuntime(Runtime::kStackGuard, 0));

src/compiler/control-builders.cc

@@ -9,8 +9,8 @@ namespace internal {
 namespace compiler {
 
 
-void IfBuilder::If(Node* condition) {
-  builder_->NewBranch(condition);
+void IfBuilder::If(Node* condition, BranchHint hint) {
+  builder_->NewBranch(condition, hint);
   else_environment_ = environment()->CopyForConditional();
 }
 

src/compiler/control-builders.h

@@ -14,7 +14,6 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-
 // Base class for all control builders. Also provides a common interface for
 // control builders to handle 'break' and 'continue' statements when they are
 // used to model breakable statements.
@@ -49,7 +48,7 @@ class IfBuilder : public ControlBuilder {
         else_environment_(NULL) {}
 
   // Primitive control commands.
-  void If(Node* condition);
+  void If(Node* condition, BranchHint hint = BranchHint::kNone);
   void Then();
   void Else();
   void End();

src/compiler/graph-builder.h

@@ -99,8 +99,8 @@ class StructuredGraphBuilder : public GraphBuilder {
   Node* NewIfFalse() { return NewNode(common()->IfFalse()); }
   Node* NewMerge() { return NewNode(common()->Merge(1), true); }
   Node* NewLoop() { return NewNode(common()->Loop(1), true); }
-  Node* NewBranch(Node* condition) {
-    return NewNode(common()->Branch(), condition);
+  Node* NewBranch(Node* condition, BranchHint hint = BranchHint::kNone) {
+    return NewNode(common()->Branch(hint), condition);
   }
 
  protected: