From: Matthias Kretz <m.kretz@gsi.de>
Date: Thu, 2 Feb 2023 11:29:33 +0000 (+0100)
Subject: libstdc++: Fix incorrect __builtin_is_constant_evaluated calls
X-Git-Tag: releases/gcc-12.3.0~333
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16162ac2250943af3fa710496f066bf2af35ca9f;p=thirdparty%2Fgcc.git

libstdc++: Fix incorrect __builtin_is_constant_evaluated calls

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd_x86.h
	(_SimdImplX86::_S_not_equal_to, _SimdImplX86::_S_less)
	(_SimdImplX86::_S_less_equal): Do not call
	__builtin_is_constant_evaluated in constexpr-if.

(cherry picked from commit 1fd3836463c65f695831ef04c7dbda1e7a1794ba)
---

diff --git a/libstdc++-v3/include/experimental/bits/simd_x86.h b/libstdc++-v3/include/experimental/bits/simd_x86.h
index baa978bffdaf..c809520dcdd1 100644
--- a/libstdc++-v3/include/experimental/bits/simd_x86.h
+++ b/libstdc++-v3/include/experimental/bits/simd_x86.h
@@ -2340,15 +2340,16 @@ template <typename _Abi, typename>
 	    else
 	      __assert_unreachable<_Tp>();
 	  }                                                   // }}}
-	else if constexpr (!__builtin_is_constant_evaluated() // {{{
-			   && sizeof(__x) == 8)
+	else if (__builtin_is_constant_evaluated())
+	  return _Base::_S_not_equal_to(__x, __y);
+	else if constexpr (sizeof(__x) == 8)
 	  {
 	    const auto __r128 = __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__x)
 				!= __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__y);
 	    _MaskMember<_Tp> __r64;
 	    __builtin_memcpy(&__r64._M_data, &__r128, sizeof(__r64));
 	    return __r64;
-	  } // }}}
+	  }
 	else
 	  return _Base::_S_not_equal_to(__x, __y);
       }
@@ -2447,15 +2448,16 @@ template <typename _Abi, typename>
 	    else
 	      __assert_unreachable<_Tp>();
 	  }                                                   // }}}
-	else if constexpr (!__builtin_is_constant_evaluated() // {{{
-			   && sizeof(__x) == 8)
+	else if (__builtin_is_constant_evaluated())
+	  return _Base::_S_less(__x, __y);
+	else if constexpr (sizeof(__x) == 8)
 	  {
 	    const auto __r128 = __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__x)
 				< __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__y);
 	    _MaskMember<_Tp> __r64;
 	    __builtin_memcpy(&__r64._M_data, &__r128, sizeof(__r64));
 	    return __r64;
-	  } // }}}
+	  }
 	else
 	  return _Base::_S_less(__x, __y);
       }
@@ -2554,15 +2556,16 @@ template <typename _Abi, typename>
 	    else
 	      __assert_unreachable<_Tp>();
 	  }                                                   // }}}
-	else if constexpr (!__builtin_is_constant_evaluated() // {{{
-			   && sizeof(__x) == 8)
+	else if (__builtin_is_constant_evaluated())
+	  return _Base::_S_less_equal(__x, __y);
+	else if constexpr (sizeof(__x) == 8)
 	  {
 	    const auto __r128 = __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__x)
 				<= __vector_bitcast<_Tp, 16 / sizeof(_Tp)>(__y);
 	    _MaskMember<_Tp> __r64;
 	    __builtin_memcpy(&__r64._M_data, &__r128, sizeof(__r64));
 	    return __r64;
-	  } // }}}
+	  }
 	else
 	  return _Base::_S_less_equal(__x, __y);
       }