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[ARM] Optimize {s,u}{add,sub}.with.overflow.

Description

[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

Details

Committed
jgalensonDec 20 2017, 2:25 PM
Differential Revision
D35635: [ARM] Optimize {s,u}{add,sub}.with.overflow
Parents
rL321223: Add a printing policy to the ASTDumper.
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