[clang] [llvm] [Clang][AArch64] Command-line options for A-profile's Sign Return Address Hardening (PR #176171)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,h,cpp -- clang/test/CodeGen/aarch64-sign-return-address-harden.c clang/test/Frontend/aarch64-harden-pac-ret-err.c clang/test/Sema/aarch64-harden-pac-ret-attr-err-warn.c clang/test/Sema/aarch64-harden-pac-ret-attr-ignored.c clang/test/Sema/aarch64-harden-pac-ret-attr.c clang/include/clang/Basic/LangOptions.h clang/include/clang/Basic/TargetInfo.h clang/lib/Basic/Targets/AArch64.cpp clang/lib/Basic/Targets/AArch64.h clang/lib/Basic/Targets/ARM.cpp clang/lib/Basic/Targets/ARM.h clang/lib/CodeGen/CodeGenModule.cpp clang/lib/CodeGen/TargetInfo.cpp clang/lib/CodeGen/Targets/AArch64.cpp clang/lib/CodeGen/Targets/ARM.cpp clang/lib/Driver/ToolChains/Clang.cpp clang/lib/Sema/SemaDeclAttr.cpp clang/test/CodeGen/AArch64/sign-return-address.c clang/test/Driver/aarch64-security-options.c clang/test/Driver/arm-security-options.c --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 6bcdf1e42..fbe710329 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -3701,7 +3701,8 @@ bool Sema::checkTargetAttr(SourceLocation LiteralLoc, StringRef AttrStr) {
 
   if (ParsedAttrs.BranchProtection.empty()) {
     if (!ParsedAttrs.SignReturnAddrHardening.empty())
-      return Diag(LiteralLoc, diag::warn_attribute_harden_pac_ret_requires_pac_ret);
+      return Diag(LiteralLoc,
+                  diag::warn_attribute_harden_pac_ret_requires_pac_ret);
     return false;
   }
 

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https://github.com/llvm/llvm-project/pull/176171