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Implement a better workaround for GCC's bug #87544

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This commit is contained in:
Gael Guennebaud 2018-10-07 15:00:05 +02:00
parent 409132bb81
commit 6512c5e136
1 changed files with 10 additions and 9 deletions
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19
Eigen/src/Core/util/Memory.h
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@ -884,18 +884,19 @@ public:
~aligned_allocator() {} ~aligned_allocator() {}
#if EIGEN_COMP_GNUC_STRICT && EIGEN_GNUC_AT_LEAST(7,0)
// In gcc std::allocator::max_size() is bugged making gcc triggers a warning:
// eigen/Eigen/src/Core/util/Memory.h:189:12: warning: argument 1 value '18446744073709551612' exceeds maximum object size 9223372036854775807
// See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87544
size_type max_size() const {
return (std::numeric_limits<std::ptrdiff_t>::max)()/sizeof(T);
}
#endif
pointer allocate(size_type num, const void* /*hint*/ = 0) pointer allocate(size_type num, const void* /*hint*/ = 0)
{ {
internal::check_size_for_overflow<T>(num); internal::check_size_for_overflow<T>(num);
size_type size = num * sizeof(T); return static_cast<pointer>( internal::aligned_malloc(num * sizeof(T)) );
#if EIGEN_COMP_GNUC_STRICT && EIGEN_GNUC_AT_LEAST(7,0)
// workaround gcc bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87544
// It triggered eigen/Eigen/src/Core/util/Memory.h:189:12: warning: argument 1 value '18446744073709551612' exceeds maximum object size 9223372036854775807
if(size>=std::size_t((std::numeric_limits<std::ptrdiff_t>::max)()))
return 0;
else
#endif
return static_cast<pointer>( internal::aligned_malloc(size) );
} }
void deallocate(pointer p, size_type /*num*/) void deallocate(pointer p, size_type /*num*/)