[clang] [clang] Fix static local variables in consteval functions (PR #156933)

[Mariya Podchishchaeva via cfe-commits]

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@@ -432,7 +443,8 @@ void CodeGenFunction::EmitStaticVarDecl(const VarDecl &D,
   bool isCudaSharedVar = getLangOpts().CUDA && getLangOpts().CUDAIsDevice &&
                          D.hasAttr<CUDASharedAttr>();
   // If this value has an initializer, emit it.
-  if (D.getInit() && !isCudaSharedVar) {
+  if (D.getInit() && !isCudaSharedVar &&
+      !(D.isUsableInConstantExpressions(getContext()) && D.isStaticLocal())) {
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Fznamznon wrote:

> So I think D.isStaticLocal() is always true.

I would expect that from a function named `EmitStaticVarDecl`, however It is not true at least for some OpenCL variables and if `-fmerge-all-constants` flag is passed. Same goes for `getOrCreateStaticVarDecl` since it is called above. I need to see what happens a bit more to avoid that check...

https://github.com/llvm/llvm-project/pull/156933