[PATCH] D139289: [SCCP] Propagate equality or inequality state of a not-constant

Nikita Popov via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Dec 5 02:52:37 PST 2022


nikic added inline comments.


================
Comment at: llvm/lib/Transforms/Utils/SCCPSolver.cpp:1330
+                         ? ValueLatticeElement::getNot(CondVal.getConstant())
+                         : ValueLatticeElement::get(CondVal.getConstant()));
         return;
----------------
nikic wrote:
> Shouldn't this be getNotConstant()? Probably missing test coverage, I'd expect this to assert.
Actually, isn't this case entirely incorrect? If `A != B` and `B != C`, then that does not imply that `A == C`, right?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139289/new/

https://reviews.llvm.org/D139289



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