[clang] [clang][RISCV] Introduce command line options for RISC-V Zicfilp CFI (PR #109784)

[Ming-Yi Lai via cfe-commits]

================
@@ -198,6 +198,21 @@ 
TargetInfo::checkCFProtectionBranchSupported(DiagnosticsEngine &Diags) const {
   return false;
 }
 
+CFBranchLabelSchemeKind TargetInfo::getDefaultCFBranchLabelScheme() const {
+  // if this hook is called, the target should override it to return a
+  // non-default scheme
+  llvm::report_fatal_error("not implemented");
+}
+
+bool TargetInfo::checkCFBranchLabelSchemeSupported(
+    const CFBranchLabelSchemeKind Scheme, DiagnosticsEngine &Diags) const {
+  Diags.Report(diag::err_opt_not_valid_on_target)
----------------
mylai-mtk wrote:

Guard against `Default`

https://github.com/llvm/llvm-project/pull/109784
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