8957e64a20
The new test (derived from riscv32 openssl/test/cmp_msg_test.c) revealed oscillation in two R_RISCV_CALL_PLT jumps: - First jump (~2^11 bytes away): alternated between 4 and 8 bytes. - Second jump (~2^20 bytes away): alternated between 2 and 8 bytes. The issue is not related to alignment. In 2019, GNU ld addressed a similar problem by reducing the relaxation allowance for cross-section relaxation (https://sourceware.org/bugzilla/show_bug.cgi?id=25181). This approach would result in a suboptimal layout for the tight range tested by riscv-relax-call.s. This patch stabilizes the process by preventing `remove` increment after a few passes, similar to integrated assembler's fragment relaxation. (For the Android bit reproduce, `pass < 2` leads to non-optimal layout while `pass < 3` and `pass < 4` output is identical.) Fix https://github.com/llvm/llvm-project/issues/113838 Possibly fix https://github.com/llvm/llvm-project/issues/123248 (inputs are bitcode, subject to ever-changing code generation, not reproducible) Pull Request: https://github.com/llvm/llvm-project/pull/142899
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.