[PATCH] D96897: [GlobalISel] Implement computeNumSignBits for G_ASSERT_SEXT

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
paquette added reviewers: aemerson, arsenm.
Herald added subscribers: kerbowa, hiraditya, rovka, nhaehnle, jvesely.
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Same implementation as G_SEXT_INREG.

      

Add a testcase to combine-sext-inreg for a concrete example, and a testcase to KnownBitsTest.


https://reviews.llvm.org/D96897

Files:
  llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-sext-inreg.mir
  llvm/unittests/CodeGen/GlobalISel/KnownBitsTest.cpp

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