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Unverified Commit 0a24a071 authored by Vladislav Shchapov's avatar Vladislav Shchapov Committed by GitHub
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Clz builtin may be not constexpr (Issue #2761) (#2762)

parent ba6f89c7
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include/fmt/format.h
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...@@ -991,7 +991,7 @@ FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int { ...@@ -991,7 +991,7 @@ FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
template <int BITS, typename UInt> template <int BITS, typename UInt>
FMT_CONSTEXPR auto count_digits(UInt n) -> int { FMT_CONSTEXPR auto count_digits(UInt n) -> int {
#ifdef FMT_BUILTIN_CLZ #ifdef FMT_BUILTIN_CLZ
if (num_bits<UInt>() == 32) if (!is_constant_evaluated() && num_bits<UInt>() == 32)
return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1; return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
#endif #endif
// Lambda avoids unreachable code warnings from NVHPC. // Lambda avoids unreachable code warnings from NVHPC.
......
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