[clang] [CIR] Handle NullStmt (PR #134889)

[Erich Keane via cfe-commits]

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@@ -57,6 +57,7 @@ mlir::LogicalResult CIRGenFunction::emitStmt(const Stmt *s,
 
   switch (s->getStmtClass()) {
   case Stmt::BreakStmtClass:
+  case Stmt::NullStmtClass:
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erichkeane wrote:

Classic codegen ALSO puts `NoStmtClass` here, might be worth doing 'while we are here'. In general, only invalid statements should get it, but is there for 'completeness' I presume?  (since there is no default).

https://github.com/llvm/llvm-project/pull/134889