[clang] [Clang] Instantiate functions from constant evaluation. (PR #205557)

[Corentin Jabot via cfe-commits]

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@@ -324,7 +324,8 @@ Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
       GlobalNewDeleteDeclared(false), DisableTypoCorrection(false),
       TyposCorrected(0), IsBuildingRecoveryCallExpr(false),
       CurrentInstantiationScope(nullptr), NonInstantiationEntries(0),
-      ArgPackSubstIndex(std::nullopt), SatisfactionCache(Context) {
+      ArgPackSubstIndex(std::nullopt), SatisfactionCache(Context),
+      ProxyForEval(makeProxyForEval(*this)) {
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cor3ntin wrote:

This would probably explode if the proxy is used before init - you probably rely on no one doing that/ Maybe that's fine

https://github.com/llvm/llvm-project/pull/205557