[llvm] [lit] Support wildcard in --xfail-not option (PR #151191)

[Mircea Trofin via llvm-commits]

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@@ -238,7 +238,11 @@ def mark_xfail(selected_tests, opts):
         test_full_name = t.getFullName()
         if test_file in opts.xfail or test_full_name in opts.xfail:
             t.xfails += "*"
-        if test_file in opts.xfail_not or test_full_name in opts.xfail_not:
+        if (
+            test_file in opts.xfail_not
+            or test_full_name in opts.xfail_not
+            or opts.xfail_not == [".*"]
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mtrofin wrote:

I can switch it to `*` then.

> What happens if this is just one of multiple --xfail-not items? It looks like this implementation will not recognize it unless it's the only item.

Intentionally so. It's not meant to be a general-purpose thing. If it's one of many items, it will have no effect, since the other checks (`in`) won't match such a name.

https://github.com/llvm/llvm-project/pull/151191