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Fix a compiler bug on Clang 15+ with AVX-512

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fixes https://github.com/official-stockfish/Stockfish/issues/4450
closes https://github.com/official-stockfish/Stockfish/pull/4830

No functional change.
This commit is contained in:
MinetaS 2023-10-18 04:03:39 +09:00 • committed by Disservin
parent b7b7800e2b
commit 40c6a84434
1 changed files with 13 additions and 1 deletions
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14
src/syzygy/tbprobe.cpp
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@ -690,6 +690,17 @@ int map_score(TBTable<DTZ>* entry, File f, int value, WDLScore wdl) {
return value + 1;
}
// A temporary fix for the compiler bug with AVX-512. (#4450)
#ifdef USE_AVX512
#if defined(__clang__) && defined(__clang_major__) && __clang_major__ >= 15
#define CLANG_AVX512_BUG_FIX __attribute__((optnone))
#endif
#endif
#ifndef CLANG_AVX512_BUG_FIX
#define CLANG_AVX512_BUG_FIX
#endif
// Compute a unique index out of a position and use it to probe the TB file. To
// encode k pieces of the same type and color, first sort the pieces by square in
// ascending order s1 <= s2 <= ... <= sk then compute the unique index as:
@ -697,7 +708,8 @@ int map_score(TBTable<DTZ>* entry, File f, int value, WDLScore wdl) {
// idx = Binomial[1][s1] + Binomial[2][s2] + ... + Binomial[k][sk]
//
template<typename T, typename Ret = typename T::Ret>
Ret do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* result) {
CLANG_AVX512_BUG_FIX Ret
do_probe_table(const Position& pos, T* entry, WDLScore wdl, ProbeState* result) {
Square squares[TBPIECES];
Piece pieces[TBPIECES];