[all-commits] [llvm/llvm-project] f03782: [NVPTX] Fixup v2i8 parameter and return lowering (...

[Alex MacLean via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f03782dd67d3e1909a447aff25926d445cde5f3a
      https://github.com/llvm/llvm-project/commit/f03782dd67d3e1909a447aff25926d445cde5f3a
  Author: Alex MacLean <amaclean at nvidia.com>
  Date:   2025-06-27 (Fri, 27 Jun 2025)

  Changed paths:
    M llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelDAGToDAG.h
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.h
    M llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
    M llvm/test/CodeGen/MIR/NVPTX/floating-point-immediate-operands.mir
    M llvm/test/CodeGen/NVPTX/and-or-setcc.ll
    M llvm/test/CodeGen/NVPTX/atomics.ll
    M llvm/test/CodeGen/NVPTX/bf16-instructions.ll
    M llvm/test/CodeGen/NVPTX/bf16x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/compute-ptx-value-vts.ll
    M llvm/test/CodeGen/NVPTX/convert-fp-i8.ll
    M llvm/test/CodeGen/NVPTX/convert-int-sm20.ll
    M llvm/test/CodeGen/NVPTX/elect.ll
    M llvm/test/CodeGen/NVPTX/extractelement.ll
    M llvm/test/CodeGen/NVPTX/f16-instructions.ll
    M llvm/test/CodeGen/NVPTX/f16x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/fexp2.ll
    M llvm/test/CodeGen/NVPTX/flog2.ll
    M llvm/test/CodeGen/NVPTX/fma-relu-contract.ll
    M llvm/test/CodeGen/NVPTX/fma-relu-fma-intrinsic.ll
    M llvm/test/CodeGen/NVPTX/fma-relu-instruction-flag.ll
    M llvm/test/CodeGen/NVPTX/fma.ll
    M llvm/test/CodeGen/NVPTX/i1-icmp.ll
    M llvm/test/CodeGen/NVPTX/i128-ld-st.ll
    M llvm/test/CodeGen/NVPTX/i128.ll
    M llvm/test/CodeGen/NVPTX/i16x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/i8x2-instructions.ll
    M llvm/test/CodeGen/NVPTX/i8x4-instructions.ll
    M llvm/test/CodeGen/NVPTX/idioms.ll
    M llvm/test/CodeGen/NVPTX/jump-table.ll
    M llvm/test/CodeGen/NVPTX/ldg-invariant-256.ll
    M llvm/test/CodeGen/NVPTX/ldg-invariant.ll
    M llvm/test/CodeGen/NVPTX/ldu-i8.ll
    M llvm/test/CodeGen/NVPTX/ldu-ldg.ll
    M llvm/test/CodeGen/NVPTX/nvvm-reflect-arch-O0.ll
    M llvm/test/CodeGen/NVPTX/param-add.ll
    M llvm/test/CodeGen/NVPTX/param-load-store.ll
    M llvm/test/CodeGen/NVPTX/param-overalign.ll
    M llvm/test/CodeGen/NVPTX/param-vectorize-device.ll
    M llvm/test/CodeGen/NVPTX/proxy-reg-erasure-ptx.ll
    M llvm/test/CodeGen/NVPTX/proxy-reg-erasure.mir
    M llvm/test/CodeGen/NVPTX/shift-opt.ll
    M llvm/test/CodeGen/NVPTX/tid-range.ll
    M llvm/test/CodeGen/NVPTX/unaligned-param-load-store.ll
    M llvm/test/CodeGen/NVPTX/variadics-backend.ll
    M llvm/test/CodeGen/NVPTX/vector-returns.ll
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/nvptx-basic.ll.expected

  Log Message:
  -----------
  [NVPTX] Fixup v2i8 parameter and return lowering (#145585)

This change fixes v2i8 lowering for parameters and returned values. As
part of this work, I move the lowering for return values to use generic
ISD::STORE nodes as these are more flexible and have existing
legalization handling.

Note that calling a function with v2i8 arguments or returns is still not
working but this is left for a subsequent change as this MR is already
fairly large.

Partially addresses #128853



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