[clang] [Clang][RISCV] Add preprocessor macros for Zicfilp CFI scheme (PR #109600)

[Ming-Yi Lai via cfe-commits]

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@@ -134,6 +134,25 @@ class RISCVTargetInfo : public TargetInfo {
 
   bool validateGlobalRegisterVariable(StringRef RegName, unsigned RegSize,
                                       bool &HasSizeMismatch) const override;
+
+  bool checkCFProtectionBranchSupported() const override {
+    return ISAInfo->hasExtension("zicfilp");
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mylai-mtk wrote:

Fixed: Always return supported for `-fcf-protection=branch`.

https://github.com/llvm/llvm-project/pull/109600