[PATCH] D12706: Handle non-constant shifts in computeKnownBits, and use computeKnownBits for constant folding in InstCombine/Simplify

[hfinkel@anl.gov via llvm-commits]

hfinkel updated this revision to Diff 37199.
hfinkel added a comment.

Rebased (and add a better comment explaining the function parameters of computeKnownBitsFromShiftOperator).


http://reviews.llvm.org/D12706

Files:
  lib/Analysis/InstructionSimplify.cpp
  lib/Analysis/ValueTracking.cpp
  lib/Transforms/InstCombine/InstructionCombining.cpp
  test/Transforms/InstCombine/all-bits-shift.ll
  test/Transforms/InstCombine/div.ll
  test/Transforms/InstCombine/load-combine-metadata.ll

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