[all-commits] [llvm/llvm-project] f19971: [GlobalISel] Implement computeKnownBits for G_ASSE...

[Jessica Paquette via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f19971d1ded2a983efd58eca0393026909368f44
      https://github.com/llvm/llvm-project/commit/f19971d1ded2a983efd58eca0393026909368f44
  Author: Jessica Paquette <jpaquette at apple.com>
  Date:   2021-01-28 (Thu, 28 Jan 2021)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-combiner-and-trivial-mask.mir
    M llvm/unittests/CodeGen/GlobalISel/KnownBitsTest.cpp

  Log Message:
  -----------
  [GlobalISel] Implement computeKnownBits for G_ASSERT_ZEXT

It's the same as the ZEXT/TRUNC case, except SrcBitWidth is given by the
immediate operand.

Update KnownBitsTest.cpp and a MIR test for a concrete example.

Differential Revision: https://reviews.llvm.org/D95566