[Sema] Allow function attribute patchable_function_entry on aarch64_be

[nickdesaulniers]

oh! Thanks for the patch, I'll have to keep an eye out for this pattern in TargetArch in the future so we don't miss it.

[nickdesaulniers]

@MaskRay can you please cherry pick this to release-10? cc @tstellar

[MaskRay]

In D79495#2023108, @nickdesaulniers wrote:

@MaskRay can you please cherry pick this to release-10? cc @tstellar

Already done. https://github.com/llvm/llvm-project/commit/98f9f73f6d2367aa8001c4d16de9d3b347febb08

Verified with check-clang (there are two test/Driver/riscv* failures which are unrelated)

clang/include/clang/Basic/Attr.td

def XRayLogArgs : InheritableAttr {
   // to include any C++ implicit this parameter.  Thus, we just store it and
   // use it as an unsigned that never needs adjustment.
   let Args = [UnsignedArgument<"ArgumentCount">];
   let Documentation = [XRayDocs];
 }
 
 def PatchableFunctionEntry
     : InheritableAttr,
-      TargetSpecificAttr<TargetArch<["aarch64", "x86", "x86_64"]>> {
+      TargetSpecificAttr<TargetArch<["aarch64", "aarch64_be", "x86", "x86_64"]>> {
   let Spellings = [GCC<"patchable_function_entry">];
   let Subjects = SubjectList<[Function, ObjCMethod]>;
   let Args = [UnsignedArgument<"Count">, DefaultIntArgument<"Offset", 0>];
   let Documentation = [PatchableFunctionEntryDocs];
 }
 
 def TLSModel : InheritableAttr {
   let Spellings = [GCC<"tls_model">];

clang/test/Sema/patchable-function-entry-attr.cpp

 // RUN: %clang_cc1 -triple aarch64 -fsyntax-only -verify=silence %s
+// RUN: %clang_cc1 -triple aarch64_be -fsyntax-only -verify=silence %s
 // RUN: %clang_cc1 -triple i386 -fsyntax-only -verify=silence %s
 // RUN: %clang_cc1 -triple x86_64 -fsyntax-only -verify=silence %s
 // RUN: %clang_cc1 -triple ppc64le -fsyntax-only -verify %s
 
 // silence-no-diagnostics
 
 // expected-warning@+1 {{unknown attribute 'patchable_function_entry' ignored}}
 [[gnu::patchable_function_entry(0)]] void f();