[clang] [llvm] [RISC-V] Disable save-restore with shadow stack (PR #225610)

[Nemanja Ivanovic via cfe-commits]

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@@ -213,6 +214,19 @@ void riscv::getRISCVTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   for (const std::string &TF : TuneFeatures)
     Features.push_back(Args.MakeArgString(TF));
 
+  if (Args.getLastArg(options::OPT_msave_restore)) {
+    auto FCFArgVal = Args.getLastArgValue(options::OPT_fcf_protection_EQ);
+    if (Args.hasArg(options::OPT_fcf_protection) || FCFArgVal == "return" ||
+        FCFArgVal == "full")
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nemanjai wrote:

Oh, I see. So I would have to also check `OPT_mno_save_restore`. Thank you for clarifying.

https://github.com/llvm/llvm-project/pull/225610