Revision: 18747
Author: [email protected]
Date: Wed Jan 22 12:59:37 2014 UTC
Log: Merged r18737 into trunk branch.
Fixed floor-of-div optimization.
BUG=334708
LOG=N
[email protected]
Review URL: https://codereview.chromium.org/144023008
http://code.google.com/p/v8/source/detail?r=18747
Added:
/trunk/test/mjsunit/regress/regress-334708.js
Modified:
/trunk/src/hydrogen-instructions.cc
/trunk/src/version.cc
=======================================
--- /dev/null
+++ /trunk/test/mjsunit/regress/regress-334708.js Wed Jan 22 12:59:37 2014
UTC
@@ -0,0 +1,42 @@
+// Copyright 2014 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
+
+function foo(x, y) {
+ return Math.floor(x / y);
+}
+
+function bar(x, y) {
+ return foo(x + 1, y + 1);
+}
+
+foo(16, "4");
+
+bar(64, 2);
+%OptimizeFunctionOnNextCall(bar);
+bar(64, 2);
=======================================
--- /trunk/src/hydrogen-instructions.cc Tue Jan 21 09:01:57 2014 UTC
+++ /trunk/src/hydrogen-instructions.cc Wed Jan 22 12:59:37 2014 UTC
@@ -1442,7 +1442,6 @@
if (op() == kMathFloor) {
HValue* val = value();
- if (val->IsChange()) val = HChange::cast(val)->value();
if (val->IsDiv() && (val->UseCount() == 1)) {
HDiv* hdiv = HDiv::cast(val);
HValue* left = hdiv->left();
@@ -1481,17 +1480,8 @@
}
HMathFloorOfDiv* instr =
HMathFloorOfDiv::New(block()->zone(), context(), new_left,
new_right);
- // Replace this HMathFloor instruction by the new HMathFloorOfDiv.
instr->InsertBefore(this);
- ReplaceAllUsesWith(instr);
- Kill();
- // We know the division had no other uses than this HMathFloor.
Delete it.
- // Dead code elimination will deal with |left| and |right| if
- // appropriate.
- hdiv->DeleteAndReplaceWith(NULL);
-
- // Return NULL to remove this instruction from the graph.
- return NULL;
+ return instr;
}
}
return this;
=======================================
--- /trunk/src/version.cc Wed Jan 22 10:50:56 2014 UTC
+++ /trunk/src/version.cc Wed Jan 22 12:59:37 2014 UTC
@@ -35,7 +35,7 @@
#define MAJOR_VERSION 3
#define MINOR_VERSION 24
#define BUILD_NUMBER 21
-#define PATCH_LEVEL 0
+#define PATCH_LEVEL 1
// Use 1 for candidates and 0 otherwise.
// (Boolean macro values are not supported by all preprocessors.)
#define IS_CANDIDATE_VERSION 0
--
--
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