erichkeane added a comment.

In D131528#3715217 <https://reviews.llvm.org/D131528#3715217>, @mstorsjo wrote:

> There are still some cases that were broken by D131307 
> <https://reviews.llvm.org/D131307>, that aren't fixed by this patch. Building 
> https://martin.st/temp/qt-enum.cpp with `clang -target i686-w64-mingw32 -c 
> -std=c++17 qt-enum.cpp -Wno-ignored-attributes -Wno-user-defined-literals` 
> succeeded before the change to make those errors downgradable, and those are 
> still an error now.

Diagnostic I'm getting is:

  <source>:135567:18: error: integer value -1 is outside the valid range of 
values [0, 1] for this enumeration type [-Wenum-constexpr-conversion]
      if (order == Qt::SortOrder(-1))

SortOrder is:

   enum SortOrder {
      AscendingOrder,
      DescendingOrder
  };

So looks like at least the range diagnosed is correct.  Latest godbolt shows 
the issue:
https://godbolt.org/z/vKn57PbGf

BUT I believe this is exactly the case that this patch should have made no 
longer a problem.  Hopefully @shafik  can look into this to confirm, and see 
why this wasn't suppressed.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D131528/new/

https://reviews.llvm.org/D131528

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