Special case the recording of constant pool entries in the slot buffer.

src/a64/assembler-a64.cc

 // Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
@@ skipping 142 matching lines @@
 
 
 bool RelocInfo::IsCodedSpecially() {
   // The deserializer needs to know whether a pointer is specially coded. Being
   // specially coded on A64 means that it is a movz/movk sequence. We don't
   // generate those for relocatable pointers.
   return false;
 }
 
 
+bool RelocInfo::IsInConstantPool() {
+  Instruction* instr = reinterpret_cast<Instruction*>(pc_);
+  return instr->IsLdrLiteralX();
+}
+
+
 void RelocInfo::PatchCode(byte* instructions, int instruction_count) {
   // Patch the code at the current address with the supplied instructions.
   Instr* pc = reinterpret_cast<Instr*>(pc_);
   Instr* instr = reinterpret_cast<Instr*>(instructions);
   for (int i = 0; i < instruction_count; i++) {
     *(pc + i) = *(instr + i);
   }
 
   // Indicate that code has changed.
   CPU::FlushICache(pc_, instruction_count * kInstructionSize);
@@ skipping 2424 matching lines @@
   // code.
 #ifdef ENABLE_DEBUGGER_SUPPORT
   RecordRelocInfo(RelocInfo::CONST_POOL, static_cast<intptr_t>(size));
 #endif
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64