[mlir] - [NFC] Fix failing lit test

[mamrami]

Summary

The test added in https://reviews.llvm.org/D138671 exits with exit code 1.
Adding not at the command solves the problem.

[springerm]

mlir/test/Integration/Dialect/Memref/cast-runtime-verification.mlir

68

Could we return %c0 here instead?

[mamrami]

mlir/test/Integration/Dialect/Memref/cast-runtime-verification.mlir

68

I tried it and it still fails.
I see they do the same "not" here: mlir/test/mlir-cpu-runner/invalid.mlir

// RUN: not mlir-cpu-runner --no-implicit-module %s 2>&1 | FileCheck %s

// CHECK: Error: top-level op must be a symbol table.
llvm.func @main()

[springerm]

mlir/test/Integration/Dialect/Memref/cast-runtime-verification.mlir

68

Interesting, I was thinking about the sparse tests (e.g., Integration/Dialect/SparseTensor/CPU/sparse_sum.mlir). But maybe they also exit with error code 1.

[mamrami]

mlir/test/Integration/Dialect/Memref/cast-runtime-verification.mlir

68

From what I see Integration/Dialect/SparseTensor/CPU/sparse_sum.mlir does not create any runtime errors.
In the test here there is a runtime error, so the exit code is 1.

[mamrami]

Since this is my first commit, I can't commit it by myself.
Can you please commit it for me? (https://llvm.org/docs/Phabricator.html#committing-someone-s-change-from-phabricator)
Thanks!

mlir/test/Integration/Dialect/Memref/cast-runtime-verification.mlir

 // RUN: mlir-opt %s -generate-runtime-verification -convert-memref-to-llvm \
 // RUN:     -test-cf-assert \
 // RUN:     -convert-func-to-llvm -reconcile-unrealized-casts | \
-// RUN: mlir-cpu-runner -e main -entry-point-result=void \
+// RUN: not mlir-cpu-runner -e main -entry-point-result=void \
 // RUN:     -shared-libs=%mlir_lib_dir/libmlir_runner_utils%shlibext 2>&1 | \
 // RUN: FileCheck %s
 
 func.func @cast_to_static_dim(%m: memref<?xf32>) -> memref<10xf32> {
   %0 = memref.cast %m : memref<?xf32> to memref<10xf32>
   return %0 : memref<10xf32>
 }
 
func.func @main() {
   func.call @cast_to_static_strides(%4)
       : (memref<?xf32, strided<[?], offset: ?>>)
      -> (memref<?xf32, strided<[9], offset: 5>>)
 
   // A last cast that actually succeeds.
   // CHECK-NOT: ERROR: Runtime op verification failed
   func.call @valid_cast(%3) : (memref<*xf32>) -> (memref<?xf32>)
 
   return
 }