[PATCH] D72609: AMDGPU/GlobalISel: Improve lowering of G_SEXT_INREG

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: nhaehnle, kerbowa.
Herald added subscribers: Petar.Avramovic, hiraditya, t-tye, tpr, dstuttard, rovka, yaxunl, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

Clamping the scalar is much better than lowering with superwide shifts
for types > s64.


https://reviews.llvm.org/D72609

Files:
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-sext-inreg.mir

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