Yinan Zhang 05681e387a Optimize cache_bin_alloc_easy for malloc fast path
`tcache_bin_info` is not accessed on malloc fast path but the
compiler reserves a register for it, as well as an additional
register for `tcache_bin_info[ind].stack_size`.  The optimization
gets rid of the need for the two registers.
2019-10-21 16:43:45 -07:00
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