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| author | Andrew Ng <andrew.ng@sony.com> | 2020-09-07 17:36:14 +0100 |
|---|---|---|
| committer | Andrew Ng <andrew.ng@sony.com> | 2020-09-08 19:32:34 +0100 |
| commit | 863aa0a37bd1a57b0720eda6d646f9abd51bf6c2 (patch) | |
| tree | c25abb7ddeb8488a2e7419cdec0b7202a6086182 /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | ce49b7d9ca01f4abbba1e5a00339d539b0ea563e (diff) | |
| download | llvm-863aa0a37bd1a57b0720eda6d646f9abd51bf6c2.zip llvm-863aa0a37bd1a57b0720eda6d646f9abd51bf6c2.tar.gz llvm-863aa0a37bd1a57b0720eda6d646f9abd51bf6c2.tar.bz2 | |
[LLD][ELF] Fix performance of MarkLive::scanEhFrameSection
MarkLive::scanEhFrameSection is used to retain personality/LSDA
functions when --gc-sections is enabled.
Improve its performance by only iterating over the .eh_frame relocations
that need to be resolved for an EhSectionPiece. This optimization makes
the same assumption as elsewhere in LLD that the .eh_frame relocations
are sorted by r_offset.
This appears to be a performance regression introduced in commit
e6c24299d237 (https://reviews.llvm.org/D59800).
This change has been seen to reduce link time by up to ~50%.
Differential Revision: https://reviews.llvm.org/D87245
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
0 files changed, 0 insertions, 0 deletions