libstdc++: Don't check always-true condition [PR101965]

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:

	PR libstdc++/101965
	* include/std/charconv (__to_chars_i): Remove redundant check.

(cherry picked from commit 85a709595005b5df4b2ee9d81717a5df19c0023f)

diff --git a/libstdc++-v3/include/std/charconv b/libstdc++-v3/include/std/charconv
index 64a6606bb33872127d1f9f8b7c23e4005fd21335..8572e376c92a0a4a6fc3673604b65e2e62b2acbc 100644 (file)
--- a/libstdc++-v3/include/std/charconv
+++ b/libstdc++-v3/include/std/charconv
@@ -336,12 +336,10 @@ namespace __detail
          *__first = '0';
          return { __first + 1, errc{} };
        }
-
-      if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value)
+      else if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value)
        if (__value < 0)
          {
-           if (__builtin_expect(__first != __last, 1))
-             *__first++ = '-';
+           *__first++ = '-';
            __unsigned_val = _Up(~__value) + _Up(1);
          }