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Merge pull request #541 from marcelwa/acd-local-extend-shift-ub 

ACD: 64-bit shift by 64 or more in local_extend_to
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alanminko 2026-08-16 01:48:58 +09:00 committed by GitHub
parent 1d28820170 0f5951ab2c
commit fe862d3647
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1 changed files with 4 additions and 1 deletions
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5
src/map/if/acd/ac_decomposition.hpp
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@ -1322,7 +1322,10 @@ private:
{ {
auto mask = *tt.begin(); auto mask = *tt.begin();
for ( auto i = real_num_vars; i < num_vars; ++i ) /* Replicate within the word only. Variables 6 and above are replicated by the
* std::fill below, and shifting a 64-bit word by (1 << i) for i >= 6 is undefined
* behaviour rather than a no-op. */
for ( auto i = real_num_vars; i < std::min( num_vars, 6u ); ++i )
{ {
mask |= ( mask << ( 1 << i ) ); mask |= ( mask << ( 1 << i ) );
} }