Don't emit the lazy deopt sequence when we can't deopt.

runtime/vm/flow_graph_compiler_arm64.cc

 // Copyright (c) 2014, 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_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1092 matching lines @@
       }
     }
   }
 
   VisitBlocks();
 
   __ brk(0);
   ASSERT(assembler()->constant_pool_allowed());
   GenerateDeferredCode();
 
-  if (is_optimizing()) {
+  if (is_optimizing() && Compiler::allow_recompilation()) {
     // Leave enough space for patching in case of lazy deoptimization from
     // deferred code.
     for (intptr_t i = 0;
       i < CallPattern::kDeoptCallLengthInInstructions;
       ++i) {
       __ orr(R0, ZR, Operand(R0));  // nop
     }
     lazy_deopt_pc_offset_ = assembler()->CodeSize();
   __ BranchPatchable(*StubCode::DeoptimizeLazy_entry());
   }
@@ skipping 695 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   __ PopDouble(reg);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64