VM: [Kernel] Implement CatchBlockEntryInstr::should_restore_closure_context on all platforms.

runtime/vm/flow_graph_compiler.h

 // 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.
 
 #ifndef RUNTIME_VM_FLOW_GRAPH_COMPILER_H_
 #define RUNTIME_VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 522 matching lines @@
                       ICData::DeoptReasonId reason,
                       uint32_t flags = 0);
 
 #if defined(TARGET_ARCH_DBC)
   void EmitDeopt(intptr_t deopt_id,
                  ICData::DeoptReasonId reason,
                  uint32_t flags = 0);
 
   // If the cid does not fit in 16 bits, then this will cause a bailout.
   uint16_t ToEmbeddableCid(intptr_t cid, Instruction* instruction);
+
+  // In optimized code, variables at the catch block entry reside at the top
+  // of the allocatable register range.
+  // Must be in sync with FlowGraphAllocator::ProcessInitialDefinition.
+  intptr_t CatchEntryRegForVariable(const LocalVariable& var);
 #endif  // defined(TARGET_ARCH_DBC)
 
   CompilerDeoptInfo* AddDeoptIndexAtCall(intptr_t deopt_id);
 
   void AddSlowPathCode(SlowPathCode* slow_path);
 
   void FinalizeExceptionHandlers(const Code& code);
   void FinalizePcDescriptors(const Code& code);
   RawArray* CreateDeoptInfo(Assembler* assembler);
   void FinalizeStackMaps(const Code& code);
@@ skipping 279 matching lines @@
   ZoneGrowableArray<const ICData*>* deopt_id_to_ic_data_;
 
   Array& edge_counters_array_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_FLOW_GRAPH_COMPILER_H_