Revision: 14753
Author: [email protected]
Date: Wed May 22 08:33:53 2013
Log: Don't allow copying holes to fields.
[email protected]
Review URL: https://chromiumcodereview.appspot.com/15745006
http://code.google.com/p/v8/source/detail?r=14753
Added:
/branches/bleeding_edge/test/mjsunit/regress/regress-copy-hole-to-field.js
Modified:
/branches/bleeding_edge/src/hydrogen-instructions.h
=======================================
--- /dev/null
+++
/branches/bleeding_edge/test/mjsunit/regress/regress-copy-hole-to-field.js
Wed May 22 08:33:53 2013
@@ -0,0 +1,57 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Copy a hole from HOLEY_DOUBLE to double field.
+var a = [1.5,,1.7];
+var o = {a:1.8};
+
+function f1(o,a,i) {
+ o.a = a[i];
+}
+
+f1(o,a,0);
+f1(o,a,0);
+assertEquals(1.5, o.a);
+%OptimizeFunctionOnNextCall(f1);
+f1(o,a,1);
+assertEquals(undefined, o.a);
+
+// Copy a hole from HOLEY_SMI to smi field.
+var a = [1,,3];
+var o = {ab:5};
+
+function f2(o,a,i) {
+ o.ab = a[i];
+}
+
+f2(o,a,0);
+f2(o,a,0);
+%OptimizeFunctionOnNextCall(f2);
+f2(o,a,1);
+assertEquals(undefined, o.ab);
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.h Thu May 16 07:27:39
2013
+++ /branches/bleeding_edge/src/hydrogen-instructions.h Wed May 22 08:33:53
2013
@@ -5593,6 +5593,7 @@
SetGVNFlag(kChangesBackingStoreFields);
SetGVNFlag(kDependsOnNewSpacePromotion);
}
+ SetFlag(kDeoptimizeOnUndefined);
}
DECLARE_CONCRETE_INSTRUCTION(StoreNamedField)
--
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