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Commit f56298f4 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] Simplify X86ISD::ADD/SUB if we don't use the result flag 

Simplify to the generic ISD::ADD/SUB if we don't make use of the result flag.

This mainly helps with ADDCARRY/SUBBORROW intrinsics which get expanded to X86ISD::ADD/SUB but could be simplified further.

Noticed in some of the test cases in PR31754

Differential Revision: https://reviews.llvm.org/D57234

llvm-svn: 352210
parent 21aa6ddc
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