diff --git a/mlir/include/mlir/CAPI/IntegerSet.h b/mlir/include/mlir/CAPI/IntegerSet.h
--- a/mlir/include/mlir/CAPI/IntegerSet.h
+++ b/mlir/include/mlir/CAPI/IntegerSet.h
@@ -19,6 +19,6 @@
 #include "mlir/CAPI/Wrap.h"
 #include "mlir/IR/IntegerSet.h"
 
-DEFINE_C_API_METHODS(MlirIntegerSet, mlir::IntegerSet);
+DEFINE_C_API_METHODS(MlirIntegerSet, mlir::IntegerSet)
 
 #endif // MLIR_CAPI_INTEGERSET_H
diff --git a/mlir/lib/Dialect/Affine/Transforms/SuperVectorize.cpp b/mlir/lib/Dialect/Affine/Transforms/SuperVectorize.cpp
--- a/mlir/lib/Dialect/Affine/Transforms/SuperVectorize.cpp
+++ b/mlir/lib/Dialect/Affine/Transforms/SuperVectorize.cpp
@@ -1353,14 +1353,15 @@
         }
       }
       assert(parentFound && "Child loop not nested in any parent loop");
+      (void)parentFound;
 
       //  Check that each loop at this level is not nested in another loop from
       //  this level.
-#ifndef NDEBUG
-      for (AffineForOp sibling : loops[i])
+      for (AffineForOp sibling : loops[i]) {
         assert(!sibling->isProperAncestor(loop) &&
                "Loops at the same level are nested");
-#endif
+        (void)sibling;
+      }
     }
   }
 }
diff --git a/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp b/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
--- a/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/Vectorization.cpp
@@ -146,7 +146,7 @@
       results.push_back(result);
   }
   return VectorizationResult{VectorizationStatus::NoReplace, nullptr};
-};
+}
 
 /// Generic vectorization for a single operation `op`, given already vectorized
 /// operands carried by `bvm`. Vectorization occurs as follows:
diff --git a/mlir/lib/Dialect/SPIRV/IR/SPIRVTypes.cpp b/mlir/lib/Dialect/SPIRV/IR/SPIRVTypes.cpp
--- a/mlir/lib/Dialect/SPIRV/IR/SPIRVTypes.cpp
+++ b/mlir/lib/Dialect/SPIRV/IR/SPIRVTypes.cpp
@@ -323,6 +323,9 @@
         format(std::get<6>(key)) {}
 
   Type elementType;
+  // warning (for all the bitfields below):
+  // _mlir::spirv::detail::ImageTypeStorage::dim_ is too small to hold all
+  // values of _enum class mlir::spirv::Dim_
   Dim dim : getNumBits<Dim>();
   ImageDepthInfo depthInfo : getNumBits<ImageDepthInfo>();
   ImageArrayedInfo arrayedInfo : getNumBits<ImageArrayedInfo>();
diff --git a/mlir/lib/IR/TypeDetail.h b/mlir/lib/IR/TypeDetail.h
--- a/mlir/lib/IR/TypeDetail.h
+++ b/mlir/lib/IR/TypeDetail.h
@@ -51,6 +51,8 @@
   }
 
   unsigned width : 30;
+  // warning: _mlir::detail::IntegerTypeStorage::signedness_ is too small to
+  // hold all values of _enum mlir::IntegerType::SignednessSemantics_
   IntegerType::SignednessSemantics signedness : 2;
 };