Tighten up the asserts in SmallVector::operator[]().

If this causes any new assertion failures that I didn't catch in
testing, the fix is usually to change "&v[0]" to "v.data()" for some
SmallVector v.

llvm-svn: 72221

llvm/include/llvm/ADT/SmallVector.h

@@ -121,14 +121,12 @@ public:
   const_reverse_iterator rend() const { return const_reverse_iterator(begin());}
 
 
-  /* These asserts could be "Begin + idx < End", but there are lots of places
-     in llvm where we use &v[v.size()] instead of v.end(). */
   reference operator[](unsigned idx) {
-    assert (Begin + idx <= End);
+    assert (Begin + idx < End);
     return Begin[idx];
   }
   const_reference operator[](unsigned idx) const {
-    assert (Begin + idx <= End);
+    assert (Begin + idx < End);
     return Begin[idx];
   }