[all-commits] [llvm/llvm-project] 9e811b: [CodeGen] Fix ComputeNumSignBits for scalable vectors

[david-arm via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e811b0d932c9e808f1ec4f208591f0dd20ca55f
      https://github.com/llvm/llvm-project/commit/9e811b0d932c9e808f1ec4f208591f0dd20ca55f
  Author: David Sherwood <david.sherwood at arm.com>
  Date:   2020-06-19 (Fri, 19 Jun 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/unittests/CodeGen/AArch64SelectionDAGTest.cpp

  Log Message:
  -----------
  [CodeGen] Fix ComputeNumSignBits for scalable vectors

When trying to calculate the number of sign bits for scalable vectors
we should just bail out for now and pretend we know nothing.

Differential Revision: https://reviews.llvm.org/D81093