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Issues: llvm/llvm-project

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Issues list

548.exchange2_r of SPEC CPU 2017 has 30% performance regression between LLVM 18/19 and LLVM 20 on amd64 flang Flang issues not falling into any other category performance regression:20 Regression in 20 release
#139274 opened May 9, 2025 by jiegec
14
[libc][math] log_eval_f uses overly precise polynomial for float16. libc performance
#137190 opened Apr 24, 2025 by harrisonGPU
@harrisonGPU
2
[X86][AVX2] X86FixupVectorConstantsPass - performance regression backend:X86 performance regression
#135998 opened Apr 16, 2025 by nurmukhametov
1
@RKSimon
8
UBSAN is very slow when using print_stacktrace=1 compiler-rt:ubsan Undefined behavior sanitizer performance
#135943 opened Apr 16, 2025 by mariadb-RoelVandePaar
1
[libc++] Optimize std::minmax_element libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#135495 opened Apr 12, 2025 by wsehjk Loading…
1
7
[libc++] Optimize std::for_each_n for segmented iterators libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#135468 opened Apr 12, 2025 by winner245 Loading…
@winner245
8
[libc++] Optimize {std,ranges}::distance for segmented iterators libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#133612 opened Mar 30, 2025 by winner245 Loading…
1
[libc++] Optimize ranges::{for_each, for_each_n} for segmented iterators libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#132896 opened Mar 25, 2025 by winner245 Loading…
66
[libc++] Suboptimal codegen for std::equal(std::byte) clang:frontend Language frontend issues, e.g. anything involving "Sema" performance
#132672 opened Mar 24, 2025 by halbi2
1
2
[libc++] Optimize {std,ranges}::{fill,fill_n} for segmented iterators libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#132665 opened Mar 24, 2025 by winner245 Loading…
5
[libc++] Optimizations for algorithms on flat containers libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#132459 opened Mar 21, 2025 by ldionne
@huixie90
vectorize std::search libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#130432 opened Mar 8, 2025 by hiraditya
@hiraditya
3
[libc++] adapt "elastic hashing" in std::__hash_table libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129384 opened Mar 1, 2025 by firewave
1
[libc++] Optimize ordered associative container insertion libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129330 opened Feb 28, 2025 by ldionne
1
[libc++] Reimplement std::vector operations in terms of relocation libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129328 opened Feb 28, 2025 by ldionne
@ldionne
[libc++] Optimize std::search_n libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129327 opened Feb 28, 2025 by ldionne
[libc++] Optimize std::search libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129326 opened Feb 28, 2025 by ldionne
[libc++] Ensure std::lexicographical_compare_three_way is optimized properly libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129325 opened Feb 28, 2025 by ldionne
[libc++] Low-hanging fruit optimizations in std::is_permutation libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129324 opened Feb 28, 2025 by ldionne
[libc++] Optimize ranges::contains_subrange libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129322 opened Feb 28, 2025 by ldionne
[libc++] ranges::contains(vector<int>) is slow libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance ranges Issues related to `<ranges>`
#129321 opened Feb 28, 2025 by ldionne
3
[libc++] Optimize std::find_first_of libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129319 opened Feb 28, 2025 by ldionne
[libc++] Optimize std::find_end libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129318 opened Feb 28, 2025 by ldionne
@winner245
1
[libc++] Optimize std::replace and std::replace_if libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129315 opened Feb 28, 2025 by ldionne
[libc++] std::transform with an identity predicate is much slower than std::copy libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance
#129314 opened Feb 28, 2025 by ldionne
2
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