A64: clean up pending reloc info if code generation was aborted.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 64 matching lines @@
   bool IsEnabled(CpuFeature f) {
     return (enabled_cpu_features_ & (static_cast<uint64_t>(1) << f)) != 0;
   }
 
   // Overwrite a host NaN with a quiet target NaN.  Used by mksnapshot for
   // cross-snapshotting.
   static void QuietNaN(HeapObject* nan) { }
 
   int pc_offset() const { return static_cast<int>(pc_ - buffer_); }
 
+  // This function is called when code generation is aborted, so that
+  // the assembler could clean up internal data structures.
+  virtual void AbortedCodeGeneration() { }
+
   static const int kMinimalBufferSize = 4*KB;
 
  protected:
   // The buffer into which code and relocation info are generated. It could
   // either be owned by the assembler or be provided externally.
   byte* buffer_;
   int buffer_size_;
   bool own_buffer_;
 
   // The program counter, which points into the buffer above and moves forward.
@@ skipping 982 matching lines @@
 
  private:
   int32_t multiplier_;
   int32_t shift_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_