[clang] [CIR] Fix warnings related to unused variables in release builds (PR #151412)

[Andy Kaylor via cfe-commits]

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@@ -1472,9 +1472,10 @@ Address CIRGenFunction::emitArrayToPointerDecay(const Expr *e) {
   if (e->getType()->isVariableArrayType())
     return addr;
 
-  auto pointeeTy = mlir::cast<cir::ArrayType>(lvalueAddrTy.getPointee());
+  [[maybe_unused]] auto pointeeTy =
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andykaylor wrote:

These could be sunk into the asserts, but the expressions would need to be repeated. I was on the fence about which way to go.

https://github.com/llvm/llvm-project/pull/151412