[llvm] [LLVM][ADT] Explicitly convert size_t values to SmallVector's size type (PR #77939)

[Andrei Golubev via llvm-commits]

================
@@ -99,8 +99,9 @@ template <class Size_T> class SmallVectorBase {
   ///
   /// This does not construct or destroy any elements in the vector.
   void set_size(size_t N) {
-    assert(N <= capacity());
-    Size = N;
+    auto n = static_cast<Size_T>(N);
+    assert(n <= capacity());
----------------
andrey-golubev wrote:

I thought assert() is by definition debug-only (exception being if one explicitly sets `LLVM_ENABLE_ASSERTIONS`). do you think people  use `assert()` via LLVM_ENABLE_ASSERTIONS in production?

https://github.com/llvm/llvm-project/pull/77939