aaron.ballman accepted this revision.
aaron.ballman added a comment.
This revision is now accepted and ready to land.

In D133194#3781271 <https://reviews.llvm.org/D133194#3781271>, @Codesbyusman 
wrote:

> updated, I am not getting why this is happening but in the .cpp test file 
> without Wvla all is working and is detecting by default as you are saying but 
> when I use vla-warning/note it gives me error that "warning seen but not 
> expected"

It's because we're passing `-pedantic` on all three RUN lines; because the file 
is a C++ source file, we issue the pedantic "you're using an extension" 
warning: https://godbolt.org/z/a8nv6dhE5 so the `-Wvla` is redundant after all 
(sorry for not catching that sooner).



================
Comment at: clang/lib/AST/ExprConstant.cpp:7476-7477
   bool VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *E) {
-    CCEDiag(E, diag::note_constexpr_invalid_cast) << 0;
+    CCEDiag(E, diag::note_constexpr_invalid_cast)
+        << 0 << Info.Ctx.getLangOpts().CPlusPlus;
     return static_cast<Derived*>(this)->VisitCastExpr(E);
----------------



Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133194/new/

https://reviews.llvm.org/D133194

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