[llvm-branch-commits] [clang] [clang] Implement function pointer signing and authenticated function calls (PR #93906)

[Akira Hatanaka via llvm-branch-commits]

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@@ -1458,6 +1458,39 @@ static void setPGOUseInstrumentor(CodeGenOptions &Opts,
     Opts.setProfileUse(CodeGenOptions::ProfileClangInstr);
 }
 
+bool CompilerInvocation::setDefaultPointerAuthOptions(
+    PointerAuthOptions &Opts, const LangOptions &LangOpts,
+    const llvm::Triple &Triple) {
+  if (Triple.getArch() == llvm::Triple::aarch64) {
+    if (LangOpts.PointerAuthCalls) {
+      using Key = PointerAuthSchema::ARM8_3Key;
+      using Discrimination = PointerAuthSchema::Discrimination;
+      // If you change anything here, be sure to update <ptrauth.h>.
+      Opts.FunctionPointers =
+          PointerAuthSchema(Key::ASIA, false, Discrimination::None);
+    }
+    return true;
+  }
+
+  return false;
+}
+
+static bool parsePointerAuthOptions(PointerAuthOptions &Opts,
+                                    ArgList &Args,
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ahatanak wrote:

I removed `Args` as it wasn't used.

https://github.com/llvm/llvm-project/pull/93906