+2025-04-02 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2023-03-31 Jonathan Wakely <jwakely@redhat.com>
+
+ PR tree-optimization/107087
+ * include/bits/cow_string.h (basic_string::size()): Add
+ optimizer hint that _S_empty_rep()._M_length is always zero.
+ (basic_string::length()): Call size().
+
+2025-04-02 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2024-02-15 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/99117
+ * include/std/valarray (valarray::operator=(const _Expr&)):
+ Use loop to copy instead of __valarray_copy with _Array.
+ * testsuite/26_numerics/valarray/99117.cc: New test.
+
2024-10-07 Jonathan Wakely <jwakely@redhat.com>
* include/std/string_view (basic_string_view::copy) Use explicit