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efd9dc83f2
This reverts commit 4190d57682.
See https://lab.llvm.org/buildbot/#/builders/181/builds/33524
```
from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/lib/Support/APFloat.cpp:32:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/math/asin_utils.h:548:1: in ‘constexpr’ expansion of ‘__llvm_libc::fputil::DyadicFloat<128>(__llvm_libc::Sign::POS, -127, __llvm_libc::BigInt<128, false, long unsigned int>(__llvm_libc::operator""_u128(((const char*)"0x80000000\'00000000\'00000000\'00000000"))))’
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/FPUtil/dyadic_float.h:109:5: in ‘constexpr’ expansion of ‘((__llvm_libc::fputil::DyadicFloat<128>*)this)->__llvm_libc::fputil::DyadicFloat<128>::normalize()’
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/FPUtil/dyadic_float.h:118:16: in ‘constexpr’ expansion of ‘((__llvm_libc::fputil::DyadicFloat<128>*)this)->__llvm_libc::fputil::DyadicFloat<128>::mantissa.__llvm_libc::BigInt<128, false, long unsigned int>::operator<<=(((size_t)shift_length))’
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/big_int.h:829:52: in ‘constexpr’ expansion of ‘__llvm_libc::multiword::shift<__llvm_libc::multiword::LEFT, false, long unsigned int, 2>(((__llvm_libc::BigInt<128, false, long unsigned int>*)this)->__llvm_libc::BigInt<128, false, long unsigned int>::val, s)’
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/big_int.h:264:35: error: ‘constexpr __llvm_libc::cpp::enable_if_t<((((sizeof (To) == sizeof (From)) && __llvm_libc::cpp::is_trivially_constructible<To>::value) && __llvm_libc::cpp::is_trivially_copyable<T>::value) && __llvm_libc::cpp::is_trivially_copyable<From>::value), To> __llvm_libc::cpp::bit_cast(const From&) [with To = __int128 unsigned; From = __llvm_libc::cpp::array<long unsigned int, 2>; __llvm_libc::cpp::enable_if_t<((((sizeof (To) == sizeof (From)) && __llvm_libc::cpp::is_trivially_constructible<To>::value) && __llvm_libc::cpp::is_trivially_copyable<T>::value) && __llvm_libc::cpp::is_trivially_copyable<From>::value), To> = __int128 unsigned]’ called in a constant expression
264 | auto tmp = cpp::bit_cast<type>(array);
| ~~~~~~~~~~~~~~~~~~~^~~~~~~
from /home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/lib/Support/APFloat.cpp:32:
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/CPP/bit.h:48:1: note: ‘constexpr __llvm_libc::cpp::enable_if_t<((((sizeof (To) == sizeof (From)) && __llvm_libc::cpp::is_trivially_constructible<To>::value) && __llvm_libc::cpp::is_trivially_copyable<T>::value) && __llvm_libc::cpp::is_trivially_copyable<From>::value), To> __llvm_libc::cpp::bit_cast(const From&) [with To = __int128 unsigned; From = __llvm_libc::cpp::array<long unsigned int, 2>; __llvm_libc::cpp::enable_if_t<((((sizeof (To) == sizeof (From)) && __llvm_libc::cpp::is_trivially_constructible<To>::value) && __llvm_libc::cpp::is_trivially_copyable<T>::value) && __llvm_libc::cpp::is_trivially_copyable<From>::value), To> = __int128 unsigned]’ is not usable as a ‘constexpr’ function because:
48 | bit_cast(const From &from) {
| ^~~~~~~~
/home/buildbot/buildbot-root/cross-project-tests-sie-ubuntu/llvm-project/llvm/../libc/src/__support/CPP/bit.h:56:28: error: call to non-‘constexpr’ function ‘void __llvm_libc::cpp::inline_copy(const char*, char*) [with unsigned int N = 16]’
56 | inline_copy<sizeof(From)>(src, dst);
```
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