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

[John McCall 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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rjmccall wrote:

Ah, right, sometimes we emit constant local variables as globals. Um... well, actually, there's no reason we couldn't be lazy about those as well if they're not ODR-used. There's no harm in that.

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