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Author SHA1 Message Date
Joel Galenson 6f4e827e4c [ARM] Optimize {s,u}{add,sub}.with.overflow. 
The AArch64 backend contains code to optimize {s,u}{add,sub}.with.overflow during SelectionDAG.  This commit ports that code to the ARM backend.

Differential revision: https://reviews.llvm.org/D35635

llvm-svn: 321224
 2017-12-20 22:25:39 +00:00