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.

diff --git a/libstdc++-v3/include/experimental/bits/simd_builtin.h b/libstdc++-v3/include/experimental/bits/simd_builtin.h
index 792439a81bf20db8032e24dadb18ceb06becc494..9736db65e0169072cf468bfdf59ca869a8c77740 100644 (file)
--- a/libstdc++-v3/include/experimental/bits/simd_builtin.h
+++ b/libstdc++-v3/include/experimental/bits/simd_builtin.h
@@ -2870,7 +2870,7 @@ template <typename _Abi, typename>
                __k = __generate_from_n_evaluations<_Np,
                                                    __vector_type_t<_Tp, _Np>>(
                  [&](auto __j) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
-                   if (__i == __j)
+                   if (__i == static_cast<int>(__j))
                      return _Tp(-__x);
                    else
                      return __k[+__j];