[all-commits] [llvm/llvm-project] c3e337: [NFC] Refactor MBB hotness/coldness into templated...

[Han Shen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c3e33720403c010e140c17313eeefd9a0f25887a
      https://github.com/llvm/llvm-project/commit/c3e33720403c010e140c17313eeefd9a0f25887a
  Author: Han Shen <shenhan at google.com>
  Date:   2023-06-26 (Mon, 26 Jun 2023)

  Changed paths:
    M llvm/include/llvm/Analysis/ProfileSummaryInfo.h
    M llvm/include/llvm/Transforms/Utils/SizeOpts.h
    M llvm/lib/Analysis/ProfileSummaryInfo.cpp
    M llvm/lib/CodeGen/MachineSizeOpts.cpp
    M llvm/lib/Transforms/Utils/SizeOpts.cpp

  Log Message:
  -----------
  [NFC] Refactor MBB hotness/coldness into templated PSI functions.

In D152399, we calculate BPI->BFI in MachineFunctionSplit pass just to
use PSI->isFunctionHotInCallGraph, which is expensive. Instead, we can
implement this directly with MBFI.

Reviewer mentioned in the comment, that machine_size_opts already has
isFunctionColdInCallGraph, isFunctionHotInCallGraphNthPercentile, etc
implemented. These can be refactored and reused across MFS and machine
size opts.

This CL does this - it refactors out those internal static functions
into PSI as templated functions, so they can be accessed easily.

Differential Revision: https://reviews.llvm.org/D152758