Fix crash bug when deoptimizing from an optimized sqrt operation.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 2154 matching lines @@
 }
 
 
 LocationSummary* StaticCallInstr::MakeLocationSummary() const {
   return MakeCallSummary();
 }
 
 
 void StaticCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Label skip_call;
+  if (!compiler->is_optimizing()) {
+    // Some static calls can be optimized by the optimizing compiler (e.g. sqrt)
+    // and therefore need a deoptimization descriptor.
+    compiler->AddCurrentDescriptor(PcDescriptors::kDeoptBefore,
+                                   deopt_id(),
+                                   token_pos());
+  }
   if (function().name() == Symbols::EqualOperator().raw()) {
     compiler->EmitSuperEqualityCallPrologue(locs()->out().reg(), &skip_call);
   }
   compiler->GenerateStaticCall(deopt_id(),
                                token_pos(),
                                function(),
                                ArgumentCount(),
                                argument_names(),
                                locs());
   __ Bind(&skip_call);
@@ skipping 776 matching lines @@
     default:
       UNREACHABLE();
       return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart