[all-commits] [llvm/llvm-project] fceaff: [ValueTracking] computeKnownBitsFromShiftOperator ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: fceaff41d6b7048768294dbe436fb3016fd29fc1
      https://github.com/llvm/llvm-project/commit/fceaff41d6b7048768294dbe436fb3016fd29fc1
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-11-19 (Thu, 19 Nov 2020)

  Changed paths:
    M llvm/lib/Analysis/ValueTracking.cpp

  Log Message:
  -----------
  [ValueTracking] computeKnownBitsFromShiftOperator - move shift amount analysis to top of the function. NFCI.

These are all lightweight to compute and helps avoid issues with Known being used to hold both the shift amount and then the shifted result.

Minor cleanup for D90479.