[llvm] ADT/Matrix: two-dimensional Container with View (PR #98893)

[Matt Arsenault via llvm-commits]

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@@ -55,20 +55,25 @@ class MatrixStorage {
 
   size_t size() const { return Base.size(); }
   bool empty() const { return !size(); }
-  size_t getNumRows() const { return size() / NCols; }
+  size_t getNumRows() const {
+    assert(size() % NCols == 0 && "Internal error");
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arsenm wrote:

might as well drop the assert string if it's this generic 

https://github.com/llvm/llvm-project/pull/98893