[clang][AArch64] Avoid a crash when a non-reserved register is used#117419

igorkudrin merged 3 commits intollvm:mainllvm/llvm-project:mainfrom

igorkudrin:fix-clang-crash-aarch64-non-reserved-registerigorkudrin/llvm-project:fix-clang-crash-aarch64-non-reserved-registerCopy head branch name to clipboard