[llvm] [llvm][SPIRV] Expose fast `popcnt` support for SPIR-V targets (PR #109845)
Alex Voicu via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 26 11:20:25 PDT 2024
https://github.com/AlexVlx commented:
> The first concern coming to my mind is that we would need to have a test case with LIT CHECK's of the output SPIR-V to see/validate how ctpop and G_CTPOP are being lowered. We have test/CodeGen/SPIRV/llvm-intrinsics/ctpop.ll, but I wonder would it make sense to add a full-blown test case from unoptimized llvm ir to spir-v, what do you think?
Please see `llvm/test/CodeGen/SPIRV/optimizations/recognize-popcnt-loop.ll` for an attempt to do this.
https://github.com/llvm/llvm-project/pull/109845
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