From b4e7472028d8b46a95fc2b38c0065e857adcea6e Mon Sep 17 00:00:00 2001
From: "kmillikin@chromium.org"
 <kmillikin@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Thu, 10 Dec 2009 13:12:13 +0000
Subject: [PATCH] Disible the toplevel compiler for code containing for loops.
 Review URL: http://codereview.chromium.org/492003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3447 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/compiler.cc     | 16 +---------------
 src/fast-codegen.cc | 43 +------------------------------------------
 2 files changed, 2 insertions(+), 57 deletions(-)

diff --git a/src/compiler.cc b/src/compiler.cc
index 03fc2d6..6fc8a8f 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -738,21 +738,7 @@ void CodeGenSelector::VisitWhileStatement(WhileStatement* stmt) {
 
 
 void CodeGenSelector::VisitForStatement(ForStatement* stmt) {
-  // We do not handle loops with breaks or continue statements in their
-  // body.  We will bailout when we hit those statements in the body.
-  if (stmt->init() != NULL) {
-    Visit(stmt->init());
-    CHECK_BAILOUT;
-  }
-  if (stmt->cond() != NULL) {
-    ProcessExpression(stmt->cond(), Expression::kTest);
-    CHECK_BAILOUT;
-  }
-  Visit(stmt->body());
-  if (stmt->next() != NULL) {
-    CHECK_BAILOUT;
-    Visit(stmt->next());
-  }
+  BAILOUT("ForStatement");
 }
 
 
diff --git a/src/fast-codegen.cc b/src/fast-codegen.cc
index 1bdc367..b835faf 100644
--- a/src/fast-codegen.cc
+++ b/src/fast-codegen.cc
@@ -375,48 +375,7 @@ void FastCodeGenerator::VisitWhileStatement(WhileStatement* stmt) {
 
 
 void FastCodeGenerator::VisitForStatement(ForStatement* stmt) {
-  Comment cmnt(masm_, "[ ForStatement");
-  Label test, body, exit, stack_limit_hit, stack_check_success;
-  if (stmt->init() != NULL) Visit(stmt->init());
-
-  increment_loop_depth();
-  // Emit the test at the bottom of the loop (even if empty).
-  __ jmp(&test);
-  __ bind(&body);
-  Visit(stmt->body());
-
-  // Check stack before looping.
-  __ StackLimitCheck(&stack_limit_hit);
-  __ bind(&stack_check_success);
-
-  if (stmt->next() != NULL) Visit(stmt->next());
-
-  __ bind(&test);
-
-  if (stmt->cond() == NULL) {
-    // For an empty test jump to the top of the loop.
-    __ jmp(&body);
-  } else {
-    // We are not in an expression context because we have been compiling
-    // statements.  Set up a test expression context for the condition.
-    ASSERT_EQ(NULL, true_label_);
-    ASSERT_EQ(NULL, false_label_);
-
-    true_label_ = &body;
-    false_label_ = &exit;
-    ASSERT(stmt->cond()->context() == Expression::kTest);
-    Visit(stmt->cond());
-    true_label_ = NULL;
-    false_label_ = NULL;
-  }
-
-  __ bind(&stack_limit_hit);
-  StackCheckStub stack_stub;
-  __ CallStub(&stack_stub);
-  __ jmp(&stack_check_success);
-
-  __ bind(&exit);
-  decrement_loop_depth();
+  UNREACHABLE();
 }
 
 
-- 
2.7.4