MLIR-C: Add accessor for LLVM array type (#119998)

Author: wsmoses

mlir/include/mlir-c/Dialect/LLVM.h

@@ -37,6 +37,9 @@ MLIR_CAPI_EXPORTED MlirType mlirLLVMVoidTypeGet(MlirContext ctx);
 MLIR_CAPI_EXPORTED MlirType mlirLLVMArrayTypeGet(MlirType elementType,
                                                  unsigned numElements);
 
+/// Returns the element type of the llvm.array type.
+MLIR_CAPI_EXPORTED MlirType mlirLLVMArrayTypeGetElementType(MlirType type);
+
 /// Creates an llvm.func type.
 MLIR_CAPI_EXPORTED MlirType
 mlirLLVMFunctionTypeGet(MlirType resultType, intptr_t nArgumentTypes,

mlir/lib/CAPI/Dialect/LLVM.cpp

@@ -43,6 +43,10 @@ MlirType mlirLLVMArrayTypeGet(MlirType elementType, unsigned numElements) {
   return wrap(LLVMArrayType::get(unwrap(elementType), numElements));
 }
 
+MlirType mlirLLVMArrayTypeGetElementType(MlirType type) {
+  return wrap(cast<LLVM::LLVMArrayType>(unwrap(type)).getElementType());
+}
+
 MlirType mlirLLVMFunctionTypeGet(MlirType resultType, intptr_t nArgumentTypes,
                                  MlirType const *argumentTypes, bool isVarArg) {
   SmallVector<Type, 2> argumentStorage;