Revision: 19609
Author: [email protected]
Date: Fri Feb 28 13:07:10 2014 UTC
Log: Fixed constant folding for Math.clz32.
LOG=y
BUG=347906
[email protected]
Review URL: https://codereview.chromium.org/184353002
http://code.google.com/p/v8/source/detail?r=19609
Added:
/branches/bleeding_edge/test/mjsunit/regress/regress-347906.js
Modified:
/branches/bleeding_edge/src/hydrogen-instructions.cc
=======================================
--- /dev/null
+++ /branches/bleeding_edge/test/mjsunit/regress/regress-347906.js Fri Feb
28 13:07:10 2014 UTC
@@ -0,0 +1,14 @@
+// Copyright 2014 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 --harmony
+
+function foo() {
+ return Math.clz32(12.34);
+}
+
+foo();
+foo();
+%OptimizeFunctionOnNextCall(foo);
+foo();
=======================================
--- /branches/bleeding_edge/src/hydrogen-instructions.cc Tue Feb 25
16:11:58 2014 UTC
+++ /branches/bleeding_edge/src/hydrogen-instructions.cc Fri Feb 28
13:07:10 2014 UTC
@@ -3955,7 +3955,7 @@
case kMathFloor:
return H_CONSTANT_DOUBLE(std::floor(d));
case kMathClz32: {
- uint32_t i = static_cast<uint32_t>(constant->Integer32Value());
+ uint32_t i = DoubleToUint32(d);
return H_CONSTANT_INT(
(i == 0) ? 32 : CompilerIntrinsics::CountLeadingZeros(i));
}
--
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