[all-commits] [llvm/llvm-project] f81879: [Libomptarget] Add RPC-based printf implementation...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f81879c0f70ee5a1cf1d5b716dfd49d1a271cc2d
      https://github.com/llvm/llvm-project/commit/f81879c0f70ee5a1cf1d5b716dfd49d1a271cc2d
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2024-04-10 (Wed, 10 Apr 2024)

  Changed paths:
    M openmp/libomptarget/DeviceRTL/CMakeLists.txt
    M openmp/libomptarget/DeviceRTL/src/LibC.cpp

  Log Message:
  -----------
  [Libomptarget] Add RPC-based printf implementation for OpenMP #85638

Summary:
Relanding after reverting, only applies to AMDGPU for now.

This patch adds an implementation of printf that's provided by the GPU
C library runtime. This pritnf currently implemented using the same
wrapper handling that OpenMP sets up. This will be removed once we have
proper varargs support.

This printf differs from the one CUDA offers in that it is synchronous
and uses a finite size. Additionally we support pretty much every
format specifier except the %n option.

Depends on #85331



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