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Add branch hint for _mi_os_good_alloc_size

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In _mi_os_good_alloc_size, overflow caused by alignment size is rare,
and this patch added the appropriate branch hint during range checks.
This commit is contained in:
Jim Huang 2021-05-31 11:49:08 +08:00
parent e2c095fad2
commit d48c93af2c
1 changed files with 1 additions and 1 deletions
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src/os.c
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@ -113,7 +113,7 @@ size_t _mi_os_good_alloc_size(size_t size) {
else if (size < 8*MiB) align_size = 256*KiB;
else if (size < 32*MiB) align_size = 1*MiB;
else align_size = 4*MiB;
if (size >= (SIZE_MAX - align_size)) return size; // possible overflow?
if (mi_unlikely(size >= (SIZE_MAX - align_size))) return size; // possible overflow?
return _mi_align_up(size, align_size);
}