[clang] [clang] fix uefi target for aarch64 & x86_64 (PR #120632)

[Tristan Ross via cfe-commits]

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@@ -165,6 +165,9 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
     case llvm::Triple::OpenBSD:
       return std::make_unique<OpenBSDTargetInfo<AArch64leTargetInfo>>(Triple,
                                                                       Opts);
+    case llvm::Triple::UEFI:
+      return std::make_unique<UEFIAArch64TargetInfo>(Triple, Opts);
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RossComputerGuy wrote:

I'm not sure how we should make a mixin. Also, from what I can find, the call convention and some of the data layouts are different between x86 and other UEFI capable ISA's. We could add in checks, the solution I came up with is simple enough lol. But I do agree a mixin would probably be better.

https://github.com/llvm/llvm-project/pull/120632