[PATCH] D82717: [InstCombine] Fold icmp with dominating assume

[Nikita Popov via Phabricator via llvm-commits]

nikic created this revision.
nikic added reviewers: spatel, lebedev.ri, xbolva00.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

If we `assume(x > y)`, then we should be able to fold the basic implications of that, like `x >= y`. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (CSE), but not we have an implication with non-constant operands. Support this by querying AssumptionCache.

Fixes https://bugs.llvm.org/show_bug.cgi?id=40149.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D82717

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/lib/Transforms/InstCombine/InstCombineInternal.h
  llvm/test/Transforms/InstCombine/assume_icmp.ll

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