[all-commits] [llvm/llvm-project] 396a31: Reland HIP offload PGO compiler support and link t...

[Yaxun (Sam) Liu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 396a31fca9bbeaafc41a60d4e2a9a6cf7ca03398
      https://github.com/llvm/llvm-project/commit/396a31fca9bbeaafc41a60d4e2a9a6cf7ca03398
  Author: Yaxun (Sam) Liu <yaxun.liu at amd.com>
  Date:   2026-06-08 (Mon, 08 Jun 2026)

  Changed paths:
    M clang/lib/CodeGen/CGCUDANV.cpp
    M clang/lib/Driver/ToolChains/Linux.cpp
    M clang/lib/Driver/ToolChains/MSVC.cpp
    A clang/test/CodeGenHIP/offload-pgo-sections.hip
    A clang/test/Driver/hip-profile-rocm-runtime.hip
    M llvm/include/llvm/IR/RuntimeLibcalls.td
    M llvm/include/llvm/ProfileData/InstrProf.h
    M llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
    M llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
    A llvm/test/Instrumentation/InstrProfiling/amdgpu-instrumentation.ll
    A llvm/test/Instrumentation/InstrProfiling/amdgpu-profc-arrays.ll
    A llvm/test/Instrumentation/InstrProfiling/gpu-weak.ll
    A llvm/test/Transforms/PGOProfile/amdgpu-disable-value-profiling.ll

  Log Message:
  -----------
  Reland HIP offload PGO compiler support and link the device-profile runtime (#201607)

This mostly relands the compiler part of #177665 (approved and merged,
then reverted in #201416). The first commit restores it as merged: the
AMDGPU instrumentation in LLVM and the HIP codegen in Clang.

#177665 was reverted because of a Windows CRT problem, fixed by
splitting the ROCm runtime into a separate library clang_rt.profile_rocm
(see the compiler-rt PR). The second commit links that library on the
host for HIP device PGO, in addOffloadRTLibs for the Linux and MSVC
toolchains, gated on HIP + profiling + the library being present. It is
a superset of clang_rt.profile and is linked first, so the base library
stays inert. Non-HIP links are unaffected.

Depends on the compiler-rt PR that adds clang_rt.profile_rocm.



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