diff --git a/llvm/include/llvm/Support/TaskQueue.h b/llvm/include/llvm/Support/TaskQueue.h
--- a/llvm/include/llvm/Support/TaskQueue.h
+++ b/llvm/include/llvm/Support/TaskQueue.h
@@ -98,7 +98,7 @@
         IsTaskInFlight = true;
       }
     }
-    return std::move(F);
+    return F;
   }
 
 private:
diff --git a/llvm/unittests/Support/CrashRecoveryTest.cpp b/llvm/unittests/Support/CrashRecoveryTest.cpp
--- a/llvm/unittests/Support/CrashRecoveryTest.cpp
+++ b/llvm/unittests/Support/CrashRecoveryTest.cpp
@@ -109,8 +109,9 @@
   std::string Str = RawStream.str();
   // FIXME: Handle "Depth" parameter in PrintStackTrace() function
   // to print stack trace upto a specified Depth.
-  if (!Triple(sys::getProcessTriple()).isOSWindows())
+  if (!Triple(sys::getProcessTriple()).isOSWindows()) {
     EXPECT_EQ(std::string::npos, Str.find("#1"));
+  }
 }
 
 #ifdef _WIN32
diff --git a/mlir/include/mlir/Parser.h b/mlir/include/mlir/Parser.h
--- a/mlir/include/mlir/Parser.h
+++ b/mlir/include/mlir/Parser.h
@@ -67,7 +67,7 @@
   // contain the operations inside of it.
   if (failed(op.verify()))
     return OwningOpRef<ContainerOpT>();
-  return std::move(opRef);
+  return opRef;
 }
 } // end namespace detail
 
diff --git a/mlir/tools/mlir-tblgen/OpFormatGen.cpp b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
--- a/mlir/tools/mlir-tblgen/OpFormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpFormatGen.cpp
@@ -1641,7 +1641,7 @@
                              lastWasPunctuation);
 
   // Emit a whitespace element.
-  if (NewlineElement *newline = dyn_cast<NewlineElement>(element)) {
+  if (isa<NewlineElement>(element)) {
     body << "  p.printNewline();\n";
     return;
   }
diff --git a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
--- a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
@@ -244,7 +244,7 @@
        "is",    "lambda", "nonlocal", "not",   "or",     "pass",
        "raise", "return", "try",      "while", "with",   "yield"});
   return keywords.contains(str);
-};
+}
 
 /// Checks whether `str` would shadow a generated variable or attribute
 /// part of the OpView API.