From f276c8d99f69540aa55118037d5c36b851b8beef Mon Sep 17 00:00:00 2001
From: "bmeurer@chromium.org" <bmeurer@chromium.org>
Date: Tue, 28 Oct 2014 08:33:03 +0000
Subject: [PATCH] [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 | 2 +-
 src/compiler/control-builders.cc  | 4 ++--
 src/compiler/control-builders.h   | 3 +--
 src/compiler/graph-builder.h      | 4 ++--
 4 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index b230090888..8c6f2f1711 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/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));
diff --git a/src/compiler/control-builders.cc b/src/compiler/control-builders.cc
index 3b7d05ba55..9a8db8b9a5 100644
--- a/src/compiler/control-builders.cc
+++ b/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();
 }
 
diff --git a/src/compiler/control-builders.h b/src/compiler/control-builders.h
index eb674bf018..9fc959250f 100644
--- a/src/compiler/control-builders.h
+++ b/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();
diff --git a/src/compiler/graph-builder.h b/src/compiler/graph-builder.h
index 90df6cacb2..a2bbc307ef 100644
--- a/src/compiler/graph-builder.h
+++ b/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: