[PATCH] [AArch64] Add v8.1a atomic instructions

[Vladimir Sukharev]

REPOSITORY
  rL LLVM

================
Comment at: lib/Target/AArch64/Disassembler/LLVMBuild.txt:22
@@ -21,3 +21,3 @@
 parent = AArch64
-required_libraries = AArch64Info AArch64Utils MC MCDisassembler Support
+required_libraries = AArch64Desc AArch64Info AArch64Utils MC MCDisassembler Support
 add_to_library_groups = AArch64
----------------
t.p.northover wrote:
> I could believe this change is needed, but why does this particular patch reveal the necessity?
Introduced usage of AArch64MCRegisterClasses causes the need of this explicit dependency.
Without this change, linker issues an error in shared library mode:
llvm::AArch64MCRegisterClasses could not be found in AArch64Disassembler.cpp:1558 and 1571

http://reviews.llvm.org/D8501

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