message: LLVMFuncOp: implement addEntryBlock
  This function has been declared as a part of the LLVMFuncOp interface but never
  implemented.
  Closes
diff: @@ -1115,9 +1115,23 @@ static ParseResult parseShuffleVectorOp(OpAsmParser &parser,
  }
  //===----------------------------------------------------------------------===//
  -// Builder, printer and verifier for LLVM::LLVMFuncOp.
  +// Implementations for LLVM::LLVMFuncOp.
  //===----------------------------------------------------------------------===//
  +// Add the entry block to the function.
  +Block *LLVMFuncOp::addEntryBlock() {
  + assert(empty() && "function already has an entry block");
  + assert(!isVarArg() && "unimplemented: non-external variadic functions");
  +
  + auto *entry = new Block;
  + push_back(entry);
  +
  + LLVMType type = getType();
  + for (unsigned i = 0, e = type.getFunctionNumParams(); i < e; ++i)
  + entry->addArgument(type.getFunctionParamType(i));
  + return entry;
  +}
  +
  void LLVMFuncOp::build(Builder *builder, OperationState &result, StringRef name,
  LLVMType type, LLVM::Linkage linkage,
  ArrayRef<NamedAttribute> attrs,
  