libstdc++: Fix incorrect function call in -ffast-math optimization

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

	* include/experimental/bits/simd_math.h (__hypot): Bitcasting
	between scalars requires the __bit_cast helper function instead
	of simd_bit_cast.

(cherry picked from commit a5de17d9120dde7e6598a05ea4d1556c2783c69b)

diff --git a/libstdc++-v3/include/experimental/bits/simd_math.h b/libstdc++-v3/include/experimental/bits/simd_math.h
index 5fe44adceb52e3f694dd7775a63dac2dc772fd85..b008139c11cf14e9f22f5f10814c556f67c3ddf3 100644 (file)
--- a/libstdc++-v3/include/experimental/bits/simd_math.h
+++ b/libstdc++-v3/include/experimental/bits/simd_math.h
@@ -1010,7 +1010,7 @@ template <typename _VV, typename = __detail::__odr_helper>
            using _IV = rebind_simd_t<_Ip, _V>;
            const auto __as_int = simd_bit_cast<_IV>(__hi_exp);
            const _V __scale
-             = simd_bit_cast<_V>(2 * simd_bit_cast<_Ip>(_Tp(1)) - __as_int);
+             = simd_bit_cast<_V>(2 * __bit_cast<_Ip>(_Tp(1)) - __as_int);
 #else
            const _V __scale = (__hi_exp ^ __inf) * _Tp(.5);
 #endif
@@ -1180,7 +1180,7 @@ _GLIBCXX_SIMD_CVTING2(hypot)
                using _IV = rebind_simd_t<_Ip, _V>;
                const auto __as_int = simd_bit_cast<_IV>(__hi_exp);
                const _V __scale
-                 = simd_bit_cast<_V>(2 * simd_bit_cast<_Ip>(_Tp(1)) - __as_int);
+                 = simd_bit_cast<_V>(2 * __bit_cast<_Ip>(_Tp(1)) - __as_int);
 #else
                const _V __scale = (__hi_exp ^ __inf) * _Tp(.5);
 #endif