[all-commits] [llvm/llvm-project] ef574d: Reland HIP offload PGO runtime support as a separa...

[Yaxun (Sam) Liu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ef574da13acec7d30de1e949d8a2c7c6f7ff531f
      https://github.com/llvm/llvm-project/commit/ef574da13acec7d30de1e949d8a2c7c6f7ff531f
  Author: Yaxun (Sam) Liu <yaxun.liu at amd.com>
  Date:   2026-06-04 (Thu, 04 Jun 2026)

  Changed paths:
    M compiler-rt/CMakeLists.txt
    M compiler-rt/lib/profile/CMakeLists.txt
    M compiler-rt/lib/profile/InstrProfilingFile.c
    A compiler-rt/lib/profile/InstrProfilingPlatformROCm.cpp

  Log Message:
  -----------
  Reland HIP offload PGO runtime support as a separate opt-in library (#201606)

This mostly relands the compiler-rt part of #177665 (approved and
merged, then reverted in #201416). The first commit restores it as
merged.

It was reverted because of a Windows problem: the ROCm runtime needs the
sanitizer interception library, which is built /MD on Windows, so
putting it in clang_rt.profile forced that library to /MD and broke
users linking it with the static CRT (/MT).

The second commit fixes this by building the ROCm support as a separate,
opt-in library clang_rt.profile_rocm, a /MD superset of
clang_rt.profile. The base library is left unchanged (/MT, no ROCm). The
driver links clang_rt.profile_rocm first, so it resolves all profile
symbols and the base library stays inert.

clang_rt.profile_rocm is off by default. The compiler-side change and
driver wiring are in a separate PR.



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