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git_commit commit 029cb8aff1450ed6d69f671a5e5e3e226316b42a
Author: Peng Liu <winner245@hotmail.com>
Date: Wed Mar 19 11:58:02 2025 -0400

[libc++] Fix copy_backward for vector<bool> with small storage types (#131560)

This patch fixes an issue in libc++ where `std::copy_backward` and
`ranges::copy_backward` incorrectly copy `std::vector<bool>` with small
storage types (e.g., `uint8_t`, `uint16_t`). The problem arises from
flawed bit mask computations involving integral promotions and sign-bit
extension, leading to unintended zeroing of bits. This patch corrects
the bitwise operations to ensure correct bit-level copying.

Fixes #131718.
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ldionne-old-macbook-results test results

Run Order Start Time Duration
Current 531225 2025-12-16T16:40:01 0:00:00
Previous 531030 2025-12-16T16:40:01 0:00:00
Baseline 485288 2025-12-16T16:40:01 0:00:00


Tests Summary

Status Group # # (B)
Performance Regressions 1 0
Performance Improvements 1 0
Added Tests 0 18
Unchanged Tests 88 72
Total Tests 90

Performance Regressions - execution_time Δ Previous Current σ Δ (B) σ (B)
731_astcenc_r 1.06% 10.024 10.130 - 0.00% -

Performance Improvements - execution_time Δ Previous Current σ Δ (B) σ (B)
748_flightdm_r -4.19% 9.276 8.887 - 0.00% -

Added Tests - execution_time
706_stockfish_r
707_ntest_r
709_cactus_r
710_omnetpp_r
721_gcc_r
723_llvm_r
727_cppcheck_r
729_abc_r
731_astcenc_r
734_vpr_r
735_gem5_r
736_ocio_r
737_gmsh_r
748_flightdm_r
750_sealcrypto_r
753_ns3_r
766_femflow_r
767_nest_r


Report Time: 0.13s