[PATCH] D149383: [SelectionDAG][WIP] Add support for evaluating SetCC based on knownbits

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/test/CodeGen/X86/fold-rmw-ops.ll:1372
   store i64 %or, ptr @g64
   %cond = icmp eq i64 %or, 0
   br i1 %cond, label %a, label %b
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goldstein.w.n wrote:
> RKSimon wrote:
> > comparing against zero in all these or-with-imm tests just seems to be a copy+paste from the other logic ops in this file - maybe change it to something that isn't constant foldable (test for -ve?)
> re: 'test for -ve?' hmm?
> 
> But would generally prefer to add new tests than modify existing.
'test for -ve' === 'test for negative'

Adding additional tests would be fine.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149383/new/

https://reviews.llvm.org/D149383