[all-commits] [llvm/llvm-project] ba9769: [NVPTX] support switch statement with brx.idx (#10...

[Alex MacLean via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ba976971898d74df38d155c55e008c898120d1e4
      https://github.com/llvm/llvm-project/commit/ba976971898d74df38d155c55e008c898120d1e4
  Author: Alex MacLean <amaclean at nvidia.com>
  Date:   2024-08-08 (Thu, 08 Aug 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.h
    M llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
    A llvm/test/CodeGen/NVPTX/jump-table.ll

  Log Message:
  -----------
  [NVPTX] support switch statement with brx.idx (#102400)

Add custom lowering for `BR_JT` DAG nodes to the `brx.idx` PTX
instruction ([PTX ISA 9.7.13.4. Control Flow Instructions: brx.idx]
(https://docs.nvidia.com/cuda/parallel-thread-execution/#control-flow-instructions-brx-idx)).
Depending on the heuristics in DAG selection, `switch` statements may
now be lowered using `brx.idx`



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