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* [ARM] Optimize {s,u}{add,sub}.with.overflow.Joel Galenson2017-12-201-0/+135
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
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