[x86] Sane default for Label::Distance on JumpIfRoot/JumpIfNotRoot.

R=jarin@chromium.org
BUG=chromium:563929
LOG=n

Review URL: https://codereview.chromium.org/1483343002

Cr-Commit-Position: refs/heads/master@{#32456}

src/ia32/macro-assembler-ia32.h

@@ -81,13 +81,13 @@ class MacroAssembler: public Assembler {
 
   // Compare the object in a register to a value and jump if they are equal.
   void JumpIfRoot(Register with, Heap::RootListIndex index, Label* if_equal,
-                  Label::Distance if_equal_distance = Label::kNear) {
+                  Label::Distance if_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(equal, if_equal, if_equal_distance);
   }
   void JumpIfRoot(const Operand& with, Heap::RootListIndex index,
                   Label* if_equal,
-                  Label::Distance if_equal_distance = Label::kNear) {
+                  Label::Distance if_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(equal, if_equal, if_equal_distance);
   }
@@ -95,13 +95,13 @@ class MacroAssembler: public Assembler {
   // Compare the object in a register to a value and jump if they are not equal.
   void JumpIfNotRoot(Register with, Heap::RootListIndex index,
                      Label* if_not_equal,
-                     Label::Distance if_not_equal_distance = Label::kNear) {
+                     Label::Distance if_not_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(not_equal, if_not_equal, if_not_equal_distance);
   }
   void JumpIfNotRoot(const Operand& with, Heap::RootListIndex index,
                      Label* if_not_equal,
-                     Label::Distance if_not_equal_distance = Label::kNear) {
+                     Label::Distance if_not_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(not_equal, if_not_equal, if_not_equal_distance);
   }

src/x64/macro-assembler-x64.h

@@ -149,13 +149,13 @@ class MacroAssembler: public Assembler {
 
   // Compare the object in a register to a value and jump if they are equal.
   void JumpIfRoot(Register with, Heap::RootListIndex index, Label* if_equal,
-                  Label::Distance if_equal_distance = Label::kNear) {
+                  Label::Distance if_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(equal, if_equal, if_equal_distance);
   }
   void JumpIfRoot(const Operand& with, Heap::RootListIndex index,
                   Label* if_equal,
-                  Label::Distance if_equal_distance = Label::kNear) {
+                  Label::Distance if_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(equal, if_equal, if_equal_distance);
   }
@@ -163,13 +163,13 @@ class MacroAssembler: public Assembler {
   // Compare the object in a register to a value and jump if they are not equal.
   void JumpIfNotRoot(Register with, Heap::RootListIndex index,
                      Label* if_not_equal,
-                     Label::Distance if_not_equal_distance = Label::kNear) {
+                     Label::Distance if_not_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(not_equal, if_not_equal, if_not_equal_distance);
   }
   void JumpIfNotRoot(const Operand& with, Heap::RootListIndex index,
                      Label* if_not_equal,
-                     Label::Distance if_not_equal_distance = Label::kNear) {
+                     Label::Distance if_not_equal_distance = Label::kFar) {
     CompareRoot(with, index);
     j(not_equal, if_not_equal, if_not_equal_distance);
   }

test/mjsunit/regress/regress-crbug-563929.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var x = 0;
+function a() {
+  eval("");
+  return (function() {
+    eval("");
+    return (function() {
+      eval("");
+      return (function() {
+        eval("");
+        return (function() {
+          eval("");
+          return (function() {
+            eval("");
+            return (function() {
+              eval("");
+              return (function() {
+                eval("");
+                return x;
+              })();
+            }) ();
+          })();
+        })();
+      })();
+    })();
+  })();
+}
+assertEquals(a(), 0);