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(merge: 09e3989 44c1650)
Auto merge of #62748 - luca-barbieri:optimize-refcell-borrow, r=RalfJung
authorbors <bors@rust-lang.org>
Sat, 27 Jul 2019 09:32:44 +0000 (09:32 +0000)
committerbors <bors@rust-lang.org>
Sat, 27 Jul 2019 09:32:44 +0000 (09:32 +0000)
commit0e9b465d729d07101b29b4d096d83edf9be82df0
tree210c15e12ca6b9f32a5f75ab901cccc4d8c191b8tree | snapshot
parent09e39897587dca70f0b15093d425a682c392349ccommit | diff
parent44c165074b1b034799c6e1b95a871cde46755632commit | diff
Auto merge of #62748 - luca-barbieri:optimize-refcell-borrow, r=RalfJung

Optimize RefCell read borrowing

Instead of doing two comparisons we can do only one with a bit of cleverness.

LLVM currently can't do this optimization itself on x86-64.
src/libcore/cell.rs diff1 | diff2 | blob | history
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