[PATCH] D95566: [GlobalISel] Implement computeKnownBits for G_ASSERT_ZEXT

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
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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.


https://reviews.llvm.org/D95566

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

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