deps: upgrade v8 to 4.1.0.27

PR-URL: #1289
Reviewed-By: Johan Bergström <[email protected]>

Author: bnoordhuis

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 4
 #define V8_MINOR_VERSION 1
 #define V8_BUILD_NUMBER 0
-#define V8_PATCH_LEVEL 25
+#define V8_PATCH_LEVEL 27
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/compiler/js-builtin-reducer.cc

@@ -151,8 +151,8 @@ Reduction JSBuiltinReducer::ReduceMathMax(Node* node) {
       Node* const input = r.GetJSCallInput(i);
       value = graph()->NewNode(
           common()->Select(kMachNone),
-          graph()->NewNode(simplified()->NumberLessThan(), input, value), input,
-          value);
+          graph()->NewNode(simplified()->NumberLessThan(), input, value), value,
+          input);
     }
     return Replace(value);
   }

deps/v8/src/hydrogen-bce.cc

@@ -56,7 +56,8 @@ class BoundsCheckKey : public ZoneObject {
       constant = HConstant::cast(check->index());
     }
 
-    if (constant != NULL && constant->HasInteger32Value()) {
+    if (constant != NULL && constant->HasInteger32Value() &&
+        constant->Integer32Value() != kMinInt) {
       *offset = is_sub ? - constant->Integer32Value()
                        : constant->Integer32Value();
     } else {

deps/v8/test/mjsunit/compiler/regress-468162.js

@@ -0,0 +1,11 @@
+// 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 asm = (function() {
+  "use asm";
+  var max = Math.max;
+  return function f() { return max(0, -17); };
+})();
+
+assertEquals(0, asm());

deps/v8/test/mjsunit/regress/regress-bce-underflow.js

@@ -0,0 +1,35 @@
+// 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.
+
+// Flags: --allow-natives-syntax
+
+function f(a, i, bool) {
+  var result;
+  if (bool) {
+    // Make sure i - -0x80000000 doesn't overflow in BCE, missing a check for
+    // x-0 later on.
+    result = f2(a, 0x7fffffff, i, i, -0x80000000);
+  } else {
+    result = f2(a, -3, 4, i, 0);
+  }
+  return result;
+}
+
+function f2(a, c, x, i, d) {
+  return a[x + c] + a[x - 0] + a[i - d];
+}
+
+
+var a = [];
+var i = 0;
+a.push(i++);
+a.push(i++);
+a.push(i++);
+a.push(i++);
+a.push(i++);
+f(a, 0, false);
+f(a, 0, false);
+f(a, 0, false);
+%OptimizeFunctionOnNextCall(f);
+%DebugPrint(f(a, -0x7fffffff, true));

deps/v8/test/unittests/compiler/js-builtin-reducer-unittest.cc

@@ -166,7 +166,7 @@ TEST_F(JSBuiltinReducerTest, MathMax2) {
       if (t0->Is(Type::Integral32()) && t1->Is(Type::Integral32())) {
         ASSERT_TRUE(r.Changed());
         EXPECT_THAT(r.replacement(),
-                    IsSelect(kMachNone, IsNumberLessThan(p1, p0), p1, p0));
+                    IsSelect(kMachNone, IsNumberLessThan(p1, p0), p0, p1));
       } else {
         ASSERT_FALSE(r.Changed());
         EXPECT_EQ(IrOpcode::kJSCallFunction, call->opcode());