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Roman Lebedev b4d8cd227c [DAGCombine][ARM][X86] (sub Carry, X) -> (addcarry (sub 0, X), 0, Carry) fold
Summary:
`DAGCombiner::visitADDLikeCommutative()` already has a sibling fold:
`(add X, Carry) -> (addcarry X, 0, Carry)`

This fold, as suggested by @efriedma, helps recover from //some//
of the regressions of D62266

Reviewers: efriedma, deadalnix

Subscribers: javed.absar, kristof.beyls, llvm-commits, efriedma

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62392

llvm-svn: 372259
2019-09-18 20:48:27 +00:00
2019-08-15 10:55:25 +00:00
2019-09-18 17:43:45 +00:00
2014-03-02 13:08:46 +00:00
2016-01-26 21:29:08 +00:00
2019-07-17 07:02:02 +00:00
2019-02-19 20:38:51 +00:00

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