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| author | Duncan P. N. Exon Smith <dexonsmith@apple.com> | 2021-12-07 16:20:18 -0800 |
|---|---|---|
| committer | Duncan P. N. Exon Smith <dexonsmith@apple.com> | 2021-12-08 13:57:48 -0800 |
| commit | ca451d3fa40ebbd35c702ba698e9e5f29e8ed69b (patch) | |
| tree | d51b6a792bb057aef2a3ff2f953636de08ea559c /llvm/unittests/ADT/StringRefTest.cpp | |
| parent | 1225c8a06103e029a4b2ebb782a175ab1e011cbe (diff) | |
| download | llvm-ca451d3fa40ebbd35c702ba698e9e5f29e8ed69b.zip llvm-ca451d3fa40ebbd35c702ba698e9e5f29e8ed69b.tar.gz llvm-ca451d3fa40ebbd35c702ba698e9e5f29e8ed69b.tar.bz2 | |
ADT: Add SmallVectorImpl::truncate() to replace uses of set_size()
Add `SmallVectorImpl::truncate()`, a variant of `resize()` that cannot
increase the size.
- Compared to `resize()`, this has no code path for growing the
allocation and can be better optimized.
- Compared to `set_size()`, this formally calls destructors, and does
not skip any constructors.
- Compared to `pop_back_n()`, this takes the new desired size, which in
many contexts is more intuitive than the number of elements to remove.
The immediate motivation is to pair this with `resize_for_overwrite()`
to remove uses of `set_size()`, which can then be made private.
Differential Revision: https://reviews.llvm.org/D115383
Diffstat (limited to 'llvm/unittests/ADT/StringRefTest.cpp')
0 files changed, 0 insertions, 0 deletions