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add zero parameter to primitive allocation to improve codegen for calloc etc

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Daan Leijen 2022-04-19 18:32:35 -07:00
parent 9d69e3ed06
commit d69d4c861f
5 changed files with 77 additions and 63 deletions
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15
src/page.c
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@ -815,7 +815,7 @@ static mi_page_t* mi_find_page(mi_heap_t* heap, size_t size) mi_attr_noexcept {
// Generic allocation routine if the fast path (`alloc.c:mi_page_malloc`) does not succeed.
// Note: in debug mode the size includes MI_PADDING_SIZE and might have overflowed.
void* _mi_malloc_generic(mi_heap_t* heap, size_t size) mi_attr_noexcept
void* _mi_malloc_generic(mi_heap_t* heap, size_t size, bool zero) mi_attr_noexcept
{
mi_assert_internal(heap != NULL);
@ -849,6 +849,15 @@ void* _mi_malloc_generic(mi_heap_t* heap, size_t size) mi_attr_noexcept
mi_assert_internal(mi_page_immediate_available(page));
mi_assert_internal(mi_page_block_size(page) >= size);
// and try again, this time succeeding! (i.e. this should never recurse)
return _mi_page_malloc(heap, page, size);
// and try again, this time succeeding! (i.e. this should never recurse through _mi_page_malloc)
if (mi_unlikely(zero && page->xblock_size == 0)) {
// note: we cannot call _mi_page_malloc with zeroing for huge blocks; we zero it afterwards in that case.
void* p = _mi_page_malloc(heap, page, size, false);
mi_assert_internal(p != NULL);
_mi_memzero_aligned(p, mi_page_usable_block_size(page));
return p;
}
else {
return _mi_page_malloc(heap, page, size, zero);
}
}