[all-commits] [llvm/llvm-project] 868da2: [SelectionDAG] Remove an early-out from computeKno...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 868da2ea939baf8c71a6dcb878cf6094ede9486e
      https://github.com/llvm/llvm-project/commit/868da2ea939baf8c71a6dcb878cf6094ede9486e
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2021-01-14 (Thu, 14 Jan 2021)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/test/CodeGen/X86/known-bits-vector.ll

  Log Message:
  -----------
  [SelectionDAG] Remove an early-out from computeKnownBits for smin/smax

Even if we know nothing about LHS, it can still be useful to know that
smax(LHS, RHS) >= RHS and smin(LHS, RHS) <= RHS.

Differential Revision: https://reviews.llvm.org/D87145