nit fixes

Author: lfrenot

mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td

@@ -512,7 +512,7 @@ class LLVM_CastOpWithNNegFlag<string mnemonic, string instName, Type type,
                   Type resultType, list<Trait> traits = []> :
     LLVM_Op<mnemonic, !listconcat([Pure], [DeclareOpInterfaceMethods<NonNegFlagInterface>], traits)>,
     LLVM_Builder<"$res = builder.Create" # instName # "($arg, $_resultType, /*Name=*/\"\", op.getNonNeg());"> {
-  let arguments = (ins type:$arg,  UnitAttr:$nonNeg);
+  let arguments = (ins type:$arg, UnitAttr:$nonNeg);
   let results = (outs resultType:$res);
   let builders = [LLVM_OneResultOpBuilder];
   let assemblyFormat = "(`nneg` $nonNeg^)? $arg attr-dict `:` type($arg) `to` type($res)";

mlir/lib/Dialect/LLVMIR/IR/LLVMDialect.cpp

@@ -146,9 +146,6 @@ static void printLLVMOpAttrs(OpAsmPrinter &printer, Operation *op,
   } else if (auto iface = dyn_cast<ExactFlagInterface>(op)) {
     printer.printOptionalAttrDict(filteredAttrs,
                                   /*elidedAttrs=*/{iface.getIsExactName()});
-  } else if (auto iface = dyn_cast<NonNegFlagInterface>(op)) {
-    printer.printOptionalAttrDict(filteredAttrs,
-                                  /*elidedAttrs=*/{iface.getNonNegName()});
   } else {
     printer.printOptionalAttrDict(filteredAttrs);
   }

mlir/test/Dialect/LLVMIR/roundtrip.mlir

@@ -333,7 +333,7 @@ func.func @nneg_casts(%arg0: i32, %arg1: i64, %arg2: vector<4xi32>,
   %0 = llvm.zext nneg %arg0 : i32 to i64
 // CHECK:  = llvm.zext nneg %[[V4I32]] : vector<4xi32> to vector<4xi64>
   %4 = llvm.zext nneg %arg2 : vector<4xi32> to vector<4xi64>
-// CHECK: %[[FLOAT:.*]] = llvm.uitofp nneg %[[I32]] : i32 to f32
+// CHECK:  = llvm.uitofp nneg %[[I32]] : i32 to f32
   %7 = llvm.uitofp nneg %arg0 : i32 to f32
   llvm.return
 }