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| author | Amir Ayupov <aaupov@fb.com> | 2024-11-08 16:39:33 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-11-08 16:39:33 -0800 |
| commit | 7ec682b16b49c754d5b4aa6347f8f5a00bd7dd78 (patch) | |
| tree | fe290d15a18425ba0bfef0e6af2a6d975345199b /llvm/lib/CodeGen/MachineCSE.cpp | |
| parent | f791cfc822fab3fa87b4aa10ef96a3401481850f (diff) | |
| download | llvm-7ec682b16b49c754d5b4aa6347f8f5a00bd7dd78.zip llvm-7ec682b16b49c754d5b4aa6347f8f5a00bd7dd78.tar.gz llvm-7ec682b16b49c754d5b4aa6347f8f5a00bd7dd78.tar.bz2 | |
[MC] Use StringRefs from pseudo_probe_desc section if it's mapped
Add `IsMMapped` flag to `buildGUID2FuncDescMap` controlling whether to
allocate a string in `FuncNameAllocator` or use StringRef directly.
Keep it false by default, only set it for BOLT use case because BOLT
keeps file sections in memory while processing them. llvm-profgen
constructs GUID2FuncDescMap and then releases the binary.
For medium sized binary with 0.8 GiB .pseudo_probe_desc section, this
saves 0.7 GiB peak RSS in perf2bolt.
Test Plan: no-op for llvm-profgen, NFC for perf2bolt
Reviewers: maksfb, dcci, wlei-llvm, rafaelauler, ayermolo
Reviewed By: wlei-llvm
Pull Request: https://github.com/llvm/llvm-project/pull/112996
Diffstat (limited to 'llvm/lib/CodeGen/MachineCSE.cpp')
0 files changed, 0 insertions, 0 deletions