Finish implementing lazy deoptimization (ia32, x64). Ran tests with --deoptimize-alot.

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 2257 matching lines @@
     // pointer maps for optimized functions, local variables information  etc.
     kNumberOfEntries = 5,
   };
 
  public:
   enum Kind {
     kDeoptBefore = 0,  // Deoptimization continuation point before instruction.
     kDeoptAfter,       // Deoptimization continuation point after instruction.
     kDeoptIndex,       // Index into deopt info array.
     kPatchCode,        // Buffer for patching code entry.
+    kLazyDeoptJump,    // Lazy deoptimization trampoline.
     kIcCall,           // IC call.
     kFuncCall,         // Call to known target, e.g. static call, closure call.
     kReturn,           // Return from function.
     kOther
   };
 
   intptr_t Length() const;
 
   uword PC(intptr_t index) const;
   PcDescriptors::Kind DescriptorKind(intptr_t index) const;
@@ skipping 27 matching lines @@
     return 0;
   }
   static intptr_t InstanceSize(intptr_t len) {
     ASSERT(0 <= len && len <= kMaxElements);
     return RoundedAllocationSize(
         sizeof(RawPcDescriptors) + (len * kBytesPerElement));
   }
 
   static RawPcDescriptors* New(intptr_t num_descriptors);
 
+  // Returns 0 if not found.
+  uword GetPcForKind(Kind kind) const;
+
   // Verify (assert) assumptions about pc descriptors in debug mode.
   void Verify(bool check_ids) const;
 
   static void PrintHeaderString();
 
   // We would have a VisitPointers function here to traverse the
   // pc descriptors table to visit objects if any in the table.
 
  private:
   void SetPC(intptr_t index, uword value) const;
@@ skipping 313 matching lines @@
   }
   static RawCode* FinalizeCode(const Function& function, Assembler* assembler);
   static RawCode* FinalizeCode(const char* name, Assembler* assembler);
   static RawCode* LookupCode(uword pc);
 
   int32_t GetPointerOffsetAt(int index) const {
     return *PointerOffsetAddrAt(index);
   }
   intptr_t GetTokenIndexOfPC(uword pc) const;
 
-  // Find pc of patch code buffer. Return 0 if not found.
+  // 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;
 
   // 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.
@@ skipping 2898 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_