[clang] Reland "[Modules] Record whether VarDecl initializers contain side effects" (PR #145447)

[Chuanqi Xu via cfe-commits]

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@@ -16719,6 +16719,9 @@ static bool EvaluateInPlace(APValue &Result, EvalInfo &Info, const LValue &This,
                             const Expr *E, bool AllowNonLiteralTypes) {
   assert(!E->isValueDependent());
 
+  if (E->getType().isNull())
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ChuanqiXu9 wrote:

Let's add a comment for what you write in the commit message.

https://github.com/llvm/llvm-project/pull/145447