[all-commits] [llvm/llvm-project] dbab04: [TailCallElim] Optionally suppress tail call elim ...

[Teresa Johnson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dbab04510ee89e5e9ed03cb6aff63fd218fb3042
      https://github.com/llvm/llvm-project/commit/dbab04510ee89e5e9ed03cb6aff63fd218fb3042
  Author: Teresa Johnson <tejohnson at google.com>
  Date:   2026-07-17 (Fri, 17 Jul 2026)

  Changed paths:
    M llvm/lib/Transforms/Scalar/TailRecursionElimination.cpp
    A llvm/test/Transforms/TailCallElim/disable-tail-call-elim-for-cold-calls.ll

  Log Message:
  -----------
  [TailCallElim] Optionally suppress tail call elim for cold calls (#209642)

Since eliminated tail calls result in missing frames when collecting
various types of profiles, provide an option for disabling the
elimination for cold non-musttail calls. By default the new handling is
disabled.

Since the new checks require BFI to be built in more cases, I have moved
UpdateFunctionEntryCount and ForceDisableBFI (renamed to
DisableEntryCountRecompute to match the flag and description), to
actually guard the function entry count update.



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