[clang] [MLIR][scf.parallel] Don't allow a tile size of 0 (PR #68762)

[Justin Fargnoli via cfe-commits]

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@@ -0,0 +1,8 @@
+// RUN: mlir-opt %s -pass-pipeline='builtin.module(func.func(scf-parallel-loop-tiling{parallel-loop-tile-sizes=0,0}))' -split-input-file -verify-diagnostics
+
+// XFAIL: *
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justinfargnoli wrote:

It looks like it isn't possible to use `expected-error` to check for an error at an `UnknownLoc`. If this is true, am I good to go forward with using `XFAIL`? 

https://github.com/llvm/llvm-project/pull/68762