diff --git a/llvm/include/llvm/Support/RISCVISAInfo.h b/llvm/include/llvm/Support/RISCVISAInfo.h
--- a/llvm/include/llvm/Support/RISCVISAInfo.h
+++ b/llvm/include/llvm/Support/RISCVISAInfo.h
@@ -92,6 +92,8 @@
   void updateFLen();
   void updateMinVLen();
   void updateMaxELen();
+
+  Error postProcessAndChecking();
 };
 
 } // namespace llvm
diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -461,12 +461,7 @@
       ISAInfo->Exts.erase(ExtName.str());
   }
 
-  ISAInfo->updateImplication();
-  ISAInfo->updateFLen();
-  ISAInfo->updateMinVLen();
-  ISAInfo->updateMaxELen();
-
-  if (Error Result = ISAInfo->checkDependency())
+  if (Error Result = ISAInfo->postProcessAndChecking())
     return std::move(Result);
 
   return std::move(ISAInfo);
@@ -686,12 +681,7 @@
     }
   }
 
-  ISAInfo->updateImplication();
-  ISAInfo->updateFLen();
-  ISAInfo->updateMinVLen();
-  ISAInfo->updateMaxELen();
-
-  if (Error Result = ISAInfo->checkDependency())
+  if (Error Result = ISAInfo->postProcessAndChecking())
     return std::move(Result);
 
   return std::move(ISAInfo);
@@ -919,3 +909,12 @@
   }
   return FeatureVector;
 }
+
+Error RISCVISAInfo::postProcessAndChecking() {
+  updateImplication();
+  updateFLen();
+  updateMinVLen();
+  updateMaxELen();
+
+  return checkDependency();
+}