[all-commits] [llvm/llvm-project] 121ed0: [MC][NFC] Count pseudo probes and function records

[Amir Ayupov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 121ed07975c087291ac7faf681042d51211b9f97
      https://github.com/llvm/llvm-project/commit/121ed07975c087291ac7faf681042d51211b9f97
  Author: Amir Ayupov <aaupov at fb.com>
  Date:   2024-08-26 (Mon, 26 Aug 2024)

  Changed paths:
    M bolt/lib/Rewrite/PseudoProbeRewriter.cpp
    M llvm/include/llvm/MC/MCPseudoProbe.h
    M llvm/lib/MC/MCPseudoProbe.cpp

  Log Message:
  -----------
  [MC][NFC] Count pseudo probes and function records

Pre-parse pseudo probes section counting the number of probes and
function records. These numbers are used in follow-up diff to
pre-allocate vectors for decoded probes and inline tree nodes.

Additional benefit is avoiding error handling during parsing.

This pre-parsing is fast: for a 404MiB .pseudo_probe section with
43373881 probes and 25228770 function records, it only takes 0.68±0.01s.
The total time of buildAddress2ProbeMap is 21s.

Reviewers: dcci, maksfb, rafaelauler, wlei-llvm, ayermolo

Reviewed By: wlei-llvm

Pull Request: https://github.com/llvm/llvm-project/pull/102774



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