Update CGBuiltin.cpp

Author: gmh5225

clang/lib/CodeGen/CGBuiltin.cpp

@@ -8390,6 +8390,15 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
     return Builder.CreateCall(F);
   }
 
+  if (BuiltinID == AArch64::BI__prefetch) {
+    Value *Address = EmitScalarExpr(E->getArg(0));
+    Value *RW = llvm::ConstantInt::get(Int32Ty, 0);
+    Value *Locality = ConstantInt::get(Int32Ty, 3);
+    Value *Data = llvm::ConstantInt::get(Int32Ty, 1);
+    Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
+    return Builder.CreateCall(F, {Address, RW, Locality, Data});
+  }
+	
   // Handle MSVC intrinsics before argument evaluation to prevent double
   // evaluation.
   if (std::optional<MSVCIntrin> MsvcIntId = translateArmToMsvcIntrin(BuiltinID))