Ensure that LRandom restores rsi after call to the C function on x64.

R=ulan@chromium.org
BUG=http://crbug.com/110509
TEST=test/mjsunit/regress/regress-110509.js

Review URL: https://chromiumcodereview.appspot.com/9265003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10434 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/lithium-codegen-x64.cc

@@ -2962,6 +2962,7 @@ void LCodeGen::DoRandom(LRandom* instr) {
   __ movq(global_object,
           FieldOperand(global_object, GlobalObject::kGlobalContextOffset));
   __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
+  __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
 
   // Convert 32 random bits in rax to 0.(32 random bits) in a double
   // by computing:

test/mjsunit/regress/regress-110509.js

+// Copyright 2012 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
+
+// Verify that LRandom preserves rsi correctly.
+
+function foo() {
+  Math.random();
+  new Function("");
+}
+
+foo();
+foo();
+foo();
+%OptimizeFunctionOnNextCall(foo);
+foo();