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

[Craig Topper via cfe-commits]

================
@@ -224,6 +224,26 @@ void RISCVTargetInfo::getTargetDefines(const LangOptions &Opts,
     else
       Builder.defineMacro("__riscv_32e");
   }
+
+  if (ISAInfo->hasExtension("zicfilp") && Opts.CFProtectionBranch) {
+    auto Scheme = Opts.getCFBranchLabelScheme();
+    if (Scheme == CFBranchLabelSchemeKind::Default)
+      Scheme = getDefaultCFBranchLabelScheme();
+
+    switch (Scheme) {
+    case CFBranchLabelSchemeKind::Unlabeled:
+      Builder.defineMacro("__riscv_landing_pad", "1");
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topperc wrote:

Move `__riscv_landing_pad` out of the switch since its common?

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