Reland: Improve smi shift operations and avoid repeated deoptimizations.

runtime/vm/object.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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2552 matching lines @@
   }
   intptr_t GetTokenIndexOfPC(uword pc) const;
 
   // Find pc, return 0 if not found.
   uword GetPatchCodePc() const;
   uword GetLazyDeoptPc() const;
 
   uword GetDeoptBeforePcAtDeoptId(intptr_t deopt_id) const;
   uword GetDeoptAfterPcAtDeoptId(intptr_t deopt_id) const;
 
+  uword GetPcForDeoptId(intptr_t deopt_id, PcDescriptors::Kind kind) const;
+
   // Returns true if there is an object in the code between 'start_offset'
   // (inclusive) and 'end_offset' (exclusive).
   bool ObjectExistsInArea(intptr_t start_offest, intptr_t end_offset) const;
 
   // Each (*node_ids)[n] has a an extracted ic data array (*arrays)[n].
   // Returns the maximum id found.
   intptr_t ExtractIcDataArraysAtCalls(
       GrowableArray<intptr_t>* node_ids,
       const GrowableObjectArray& ic_data_objs) const;
 
@@ skipping 36 matching lines @@
   int32_t* PointerOffsetAddrAt(int index) const {
     ASSERT(index >= 0);
     ASSERT(index < pointer_offsets_length());
     // TODO(iposva): Unit test is missing for this functionality.
     return &raw_ptr()->data_[index];
   }
   void SetPointerOffsetAt(int index, int32_t offset_in_instructions) {
     *PointerOffsetAddrAt(index) = offset_in_instructions;
   }
 
-  uword GetPcForDeoptId(intptr_t deopt_id, PcDescriptors::Kind kind) const;
 
   // New is a private method as RawInstruction and RawCode objects should
   // only be created using the Code::FinalizeCode method. This method creates
   // the RawInstruction and RawCode objects, sets up the pointer offsets
   // and links the two in a GC safe manner.
   static RawCode* New(intptr_t pointer_offsets_length);
 
   HEAP_OBJECT_IMPLEMENTATION(Code, Object);
   friend class Class;
 };
@@ skipping 139 matching lines @@
   }
 
   intptr_t num_args_tested() const {
     return raw_ptr()->num_args_tested_;
   }
 
   intptr_t deopt_id() const {
     return raw_ptr()->deopt_id_;
   }
 
+  intptr_t deopt_reason() const {
+    return raw_ptr()->deopt_reason_;
+  }
+
+  void set_deopt_reason(intptr_t reason) const;
+
   intptr_t NumberOfChecks() const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawICData));
   }
 
   static intptr_t target_name_offset() {
     return OFFSET_OF(RawICData, target_name_);
   }
 
@@ skipping 3062 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_