[all-commits] [llvm/llvm-project] e63380: [NVPTX] Add builtin support for 'globaltimer' (#79...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e633807a1fccbed91dbfe1fdc2c78adcaf21d99c
      https://github.com/llvm/llvm-project/commit/e633807a1fccbed91dbfe1fdc2c78adcaf21d99c
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2024-01-29 (Mon, 29 Jan 2024)

  Changed paths:
    M clang/include/clang/Basic/BuiltinsNVPTX.def
    M clang/test/CodeGen/builtins-nvptx.c
    M llvm/include/llvm/IR/IntrinsicsNVVM.td
    M llvm/lib/Target/NVPTX/NVPTXIntrinsics.td
    M llvm/test/CodeGen/NVPTX/intrinsics.ll

  Log Message:
  -----------
  [NVPTX] Add builtin support for 'globaltimer' (#79765)

Summary:
This patch adds support for `globaltimer` to match `clock` and
`clock64`. See the PTX ISA reference for details. This patch does not
implement the `hi` or `lo` variants for brevity as they can be obtained
from this with the cost of an additional register.

https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#special-registers-globaltimer-globaltimer-lo-globaltimer-hi