libstdc++: Fix -Wsign-compare issue

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd_builtin.h (_S_set): Compare as
	int. The actual range of these indexes is very small.

(cherry picked from commit ffa39f7120f6e83a567d7a83ff4437f6b41036ea)

diff --git a/libstdc++-v3/include/experimental/bits/simd_builtin.h b/libstdc++-v3/include/experimental/bits/simd_builtin.h
index e986ee916208ad9a25d19ad6286e886172c3e086..3128e5b515e0dc250943a1bcaa787a6c89d17051 100644 (file)
--- a/libstdc++-v3/include/experimental/bits/simd_builtin.h
+++ b/libstdc++-v3/include/experimental/bits/simd_builtin.h
@@ -2826,7 +2826,7 @@ template <typename _Abi>
                __k = __generate_from_n_evaluations<_Np,
                                                    __vector_type_t<_Tp, _Np>>(
                  [&](auto __j) {
-                   if (__i == __j)
+                   if (__i == static_cast<int>(__j))
                      return _Tp(-__x);
                    else
                      return __k[+__j];