[Clang][RISCV] Add RISCV check for hw-shadow-stack

Author: jaidTw

clang/lib/CodeGen/CodeGenFunction.cpp

@@ -899,8 +899,9 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
   if (CodeGenOpts.PointerAuth.IndirectGotos)
     Fn->addFnAttr("ptrauth-indirect-gotos");
 
-  // Add return control flow integrity attributes.
-  if (CodeGenOpts.CFProtectionReturn)
+  // Add return control flow integrity attributes for RISCV.
+  if (CodeGenOpts.CFProtectionReturn &&
+      getContext().getTargetInfo().getTriple().isRISCV())
     Fn->addFnAttr("hw-shadow-stack");
 
   // Apply xray attributes to the function (as a string, for now)