Fix bug in inlined Math.sqrt.

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 877 matching lines @@
   __ CompareClassId(RAX, kDouble);
   __ j(NOT_EQUAL, &call_method);
   __ movsd(XMM1, FieldAddress(RAX, Double::value_offset()));
   __ Bind(&double_op);
   __ sqrtsd(XMM0, XMM1);
   AssemblerMacros::TryAllocate(assembler_,
                                double_class_,
                                &call_method,
                                RAX);  // Result register.
   __ movsd(FieldAddress(RAX, Double::value_offset()), XMM0);
+  __ Drop(1);

[siva, 2012/06/21 00:39:59]

Ditto.

   __ jmp(done);
   __ Bind(&smi_to_double);
   __ SmiUntag(RAX);
   __ cvtsi2sd(XMM1, RAX);
   __ jmp(&double_op);
   __ Bind(&call_method);
 }
 
 
 void FlowGraphCompiler::CompileGraph() {
@@ skipping 159 matching lines @@
   __ cvtsi2sd(result, temp);
   __ Bind(&done);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64