Clean up some compiler warnings on my machine.

lib/RefBackend/JITHelpers/JITModule.cpp

@@ -76,15 +76,15 @@ static refbackrt::MutableArrayRef<T> toRefbackrt(llvm::MutableArrayRef<T> a) {
 }
 
 static std::string stringifyShape(refbackrt::ArrayRef<std::int32_t> extents) {
-  static constexpr char *kDynamicDimAsString = "?";
+  static constexpr char kDynamicDimAsString[] = "?";
   std::stringstream ss;
   ss << "(";
-  for (int i = 0; i < extents.size(); i++) {
+  for (int i = 0, e = extents.size(); i < e; i++) {
     if (extents[i] < 0)
       ss << kDynamicDimAsString;
     else
       ss << extents[i];
-    if (i != extents.size() - 1)
+    if (i != e - 1)
       ss << "x";
   }
   ss << ")";
@@ -135,8 +135,8 @@ JITModule::invoke(llvm::StringRef functionName,
   // Tag::kNone) currently without passing the ArgInfo structs down to the
   // Runtime level, so we deal with the output type creation here.
   for (int i = 0; i < metadata.numOutputs; i++) {
-    outputs[i] = std::move(
-        refbackrt::createRtValueFromOutputArgInfo(metadata.outputArgInfos[i]));
+    outputs[i] =
+        refbackrt::createRtValueFromOutputArgInfo(metadata.outputArgInfos[i]);
   }
 
   refbackrt::invoke(

lib/RefBackend/LowerToLLVM.cpp

@@ -307,7 +307,7 @@ createFuncDescriptorArray(ArrayRef<refbackrt::FuncMetadataOp> funcMetadatas,
     Value inputDescriptorArray =
         builder.create<LLVM::UndefOp>(loc, inputDescriptorArrayTy);
 
-    for (int i = 0; i < funcMetadata.numInputs(); i++) {
+    for (int i = 0, e = funcMetadata.numInputs(); i < e; i++) {
       // Arg Type
       if (!funcMetadata.inputArgTypes().hasValue())
         funcMetadata.emitError()
@@ -365,7 +365,7 @@ createFuncDescriptorArray(ArrayRef<refbackrt::FuncMetadataOp> funcMetadatas,
     Value outputDescriptorArray =
         builder.create<LLVM::UndefOp>(loc, outputDescriptorArrayTy);
 
-    for (int i = 0; i < funcMetadata.numOutputs(); i++) {
+    for (int i = 0, e = funcMetadata.numOutputs(); i < e; i++) {
       if (!funcMetadata.outputArgTypes().hasValue())
         funcMetadata.emitError()
             << "numOutputs > 0 but there are no outputArgTypes?";
@@ -599,11 +599,6 @@ static Type getUnrankedMemrefDescriptorType(MLIRContext *context) {
                               /*memorySpace=*/0));
 }
 
-static Type getDoubleType(MLIRContext *context) {
-  LLVMTypeConverter converter(context);
-  return converter.convertType(FloatType::getF64(context));
-}
-
 static Type getFloatType(MLIRContext *context) {
   LLVMTypeConverter converter(context);
   return converter.convertType(FloatType::getF32(context));

lib/RefBackend/Runtime/Runtime.cpp

@@ -358,8 +358,6 @@ getExternalInputArgInfo(const refbackrt::InputDescriptor &inputDescriptor) {
     ret.argType = ArgType::kF64;
     ret.elementType = ElementType::NONE;
     break;
-  default:
-    assert(false && "need to update external internal map");
   }
 
   // Extract shape information
@@ -393,8 +391,6 @@ getExternalOutputArgInfo(const refbackrt::OutputDescriptor &outputDescriptor) {
     ret.argType = ArgType::kF64;
     ret.elementType = ElementType::NONE;
     break;
-  default:
-    assert(false && "need to update external internal map");
   }
 
   // Extract shape information

tools/npcomp-run-mlir/npcomp-run-mlir.cpp

@@ -96,9 +96,10 @@ static Type convertToMLIRType(refbackrt::ElementType type, Builder &builder) {
   switch (type) {
   case refbackrt::ElementType::F32:
     return builder.getF32Type();
-  }
+  default:
     llvm_unreachable("unsupported dtype");
   }
+}
 
 static RankedTensorType getCorrespondingMLIRTensorType(refbackrt::Tensor &tensor,
                                                        Builder &builder) {
@@ -122,13 +123,13 @@ static Attribute convertToMLIRAttribute(const refbackrt::RtValue &value,
           values.push_back(basePtr[i]);
         return DenseFPElementsAttr::get(type, values);
       }
+      default:
+        llvm_unreachable("unsupported element type");
     }
   } else if (value.isFloat()) {
     return builder.getF32FloatAttr(value.toFloat());
-  } else {
-    assert(false && "could not convert value to mlir attribute");
   }
-  llvm_unreachable("unsupported dtype");
+  llvm_unreachable("unsupported type");
 }
 
 static void printOutput(const refbackrt::RtValue &value, llvm::raw_ostream &os) {