c9ca352186
Clang provides __builtin_operator_new and __builtin_operator_delete, which have the same semantics as ::operator new and ::operator delete except that the compiler is allowed to elide calls to them. This changes std::allocator to use those built-in functions so that memory allocated by std::allocator can be optimized away when using Clang. This avoids an abstraction penalty for using std::allocator to allocate storage rather than a new-expression. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: PR libstdc++/94295 * include/ext/new_allocator.h (_GLIBCXX_OPERATOR_NEW) (_GLIBCXX_OPERATOR_DELETE, _GLIBCXX_SIZED_DEALLOC): Define. (allocator::allocate, allocator::deallocate): Use new macros. |
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| .. | ||
| pb_ds | ||
| algorithm | ||
| aligned_buffer.h | ||
| alloc_traits.h | ||
| atomicity.h | ||
| bitmap_allocator.h | ||
| cast.h | ||
| cmath | ||
| codecvt_specializations.h | ||
| concurrence.h | ||
| debug_allocator.h | ||
| enc_filebuf.h | ||
| extptr_allocator.h | ||
| functional | ||
| iterator | ||
| malloc_allocator.h | ||
| memory | ||
| mt_allocator.h | ||
| new_allocator.h | ||
| numeric | ||
| numeric_traits.h | ||
| pod_char_traits.h | ||
| pointer.h | ||
| pool_allocator.h | ||
| random | ||
| random.tcc | ||
| rb_tree | ||
| rc_string_base.h | ||
| rope | ||
| ropeimpl.h | ||
| slist | ||
| sso_string_base.h | ||
| stdio_filebuf.h | ||
| stdio_sync_filebuf.h | ||
| string_conversions.h | ||
| throw_allocator.h | ||
| type_traits.h | ||
| typelist.h | ||
| vstring_fwd.h | ||
| vstring_util.h | ||
| vstring.h | ||
| vstring.tcc | ||