https://github.com/MaskRay updated https://github.com/llvm/llvm-project/pull/177088
>From 36b72e6f7385b055d3f5f68ebb1b97250c162ce1 Mon Sep 17 00:00:00 2001 From: Fangrui Song <[email protected]> Date: Tue, 20 Jan 2026 18:20:48 -0800 Subject: [PATCH 1/3] release/22.x: Add release notes for lld The notes are primarily generated by analyzing `git log release/21.x...release/22.x -- lld` logs with Claude Code. I have asked the agent to use a style similar to my previous human-generated release notes. I have reviewed and manually adjusted many ELF notes. --- lld/docs/ReleaseNotes.rst | 175 +++++++++++++++++++++++++++++++++++--- 1 file changed, 161 insertions(+), 14 deletions(-) diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst index d9b83e2eb3157..f7dece16bac10 100644 --- a/lld/docs/ReleaseNotes.rst +++ b/lld/docs/ReleaseNotes.rst @@ -29,8 +29,66 @@ Non-comprehensive list of changes in this release ELF Improvements ---------------- -* ``--print-gc-sections=<file>`` prints garbage collection section listing to a file. +* Added ``--print-gc-sections=<file>`` to redirect garbage collection section + listing to a file, avoiding contamination of stdout with other linker output. (`#159706 <https://github.com/llvm/llvm-project/pull/159706>`_) +* Added ``VersionNode`` lexer state for better version script parsing. + This brings the lexer behavior closer to GNU ld. + (`#174530 <https://github.com/llvm/llvm-project/pull/174530>`_) +* ``-r``/``--emit-relocs``: Fixed a crash when processing relocation sections + that are placed before their relocated sections. + (`#156354 <https://github.com/llvm/llvm-project/pull/156354>`_) +* Unversioned undefined symbols now use version index 0, aligning with + GNU ld 2.46 behavior. + (`#168189 <https://github.com/llvm/llvm-project/pull/168189>`_) +* ``.data.rel.ro.hot`` and ``.data.rel.ro.unlikely`` are now recognized as + RELRO sections, allowing profile-guided static data partitioning. + (`#148920 <https://github.com/llvm/llvm-project/pull/148920>`_) +* DTLTO now supports archive members and bitcode members of thin archives. + (`#157043 <https://github.com/llvm/llvm-project/pull/157043>`_) + (`#149425 <https://github.com/llvm/llvm-project/pull/149425>`_) +* Balanced Partitioning (BP) section ordering now skips input sections with + null data, and filters out section symbols. + (`#149265 <https://github.com/llvm/llvm-project/pull/149265>`_) + (`#151685 <https://github.com/llvm/llvm-project/pull/151685>`_) +* For AArch64, fixed a crash when using ``--fix-cortex-a53-843419`` with + synthetic sections and improved handling when patched code is far from + the short jump. + (`#170495 <https://github.com/llvm/llvm-project/pull/170495>`_) +* For AArch64, added support for the ``R_AARCH64_FUNCINIT64`` dynamic + relocation type for relocating word-sized data using the return value + of a function. + (`#156564 <https://github.com/llvm/llvm-project/pull/156564>`_) +* For AArch64, added support for the ``R_AARCH64_PATCHINST`` relocation type + to support deactivation symbols. + (`#133534 <https://github.com/llvm/llvm-project/pull/133534>`_) +* For AArch64, added support for reading AArch64 Build Attributes and + converting them into GNU Properties. + (`#147970 <https://github.com/llvm/llvm-project/pull/147970>`_) +* For ARM, fixed incorrect veneer generation for wraparound branches at + the high end of the 32-bit address space branching to the low end. + (`#165263 <https://github.com/llvm/llvm-project/pull/165263>`_) +* For Hexagon, added range extension thunk support. + (`#111217 <https://github.com/llvm/llvm-project/pull/111217>`_) +* For LoongArch, added GOT indirection to PC relative optimization in + normal or medium code model. + (`#123743 <https://github.com/llvm/llvm-project/pull/123743>`_) +* For LoongArch, added support for relaxation during TLSDESC GD/LD to + IE/LE conversion to remove redundant NOPs. + (`#123730 <https://github.com/llvm/llvm-project/pull/123730>`_) +* For LoongArch, the linker now checks that the relocation addend is zero + before applying relaxation to ``R_LARCH_GOT_PC_{HI20,LO12}``. + (`#151264 <https://github.com/llvm/llvm-project/pull/151264>`_) +* For LoongArch, ``-r`` now synthesizes ``R_LARCH_ALIGN`` at input section + start to preserve alignment information. + (`#153935 <https://github.com/llvm/llvm-project/pull/153935>`_) +* For RISC-V, added infrastructure for handling vendor-specific relocations. + (`#159987 <https://github.com/llvm/llvm-project/pull/159987>`_) +* For RISC-V, added support for statically resolved vendor-specific relocations. + (`#169273 <https://github.com/llvm/llvm-project/pull/169273>`_) +* For RISC-V, ``-r`` now synthesizes ``R_RISCV_ALIGN`` at input section start + to preserve alignment information during two-stage linking. + (`#151639 <https://github.com/llvm/llvm-project/pull/151639>`_) Breaking changes ---------------- @@ -38,33 +96,122 @@ Breaking changes COFF Improvements ----------------- -* ``/fat-lto-objects`` addded to support FatLTO. Without ``/fat-lto-objects`` or with ``/fat-lto-objects:no``, LLD will link LLVM FatLTO objects using the relocatable object file. +* Added ``/sectionlayout:@<file>`` to specify custom output section ordering. + (`#152779 <https://github.com/llvm/llvm-project/pull/152779>`_) +* Added ``/nodbgdirmerge`` to emit the debug directory section in ``.cvinfo`` + instead of merging it to ``.rdata``. + (`#159235 <https://github.com/llvm/llvm-project/pull/159235>`_) +* Added ``/fat-lto-objects`` to support FatLTO. (`#165529 <https://github.com/llvm/llvm-project/pull/165529>`_) -* ``/linkreprofullpathrsp`` prints the full path to each object passed to the link line to a file. - (`#174971 <https://github.com/llvm/llvm-project/pull/165449>`_) -* ``-prefetch-inputs`` can improve link times by asynchronously loading input files in RAM. - This will dampen the effect of input file I/O latency on link times. - However this flag can have an adverse effect when linking a large number of inputs files, or if all - inputs do not fit in RAM at once. For those cases, linking might be a bit slower since the inputs - will be streamed into RAM upfront, only to be evicted later by swapping. +* Added ``/linkreprofullpathrsp`` to print the full path to each object + passed to the link line to a file. + (`#174971 <https://github.com/llvm/llvm-project/pull/174971>`_) +* Added CET flags: ``/cetcompatstrict``, ``/cetipvalidationrelaxed``, + ``/cetdynamicapisinproc``, and ``/hotpatchcompatible``. + (`#150761 <https://github.com/llvm/llvm-project/pull/150761>`_) +* Added support for ARM64X same-address thunks. + (`#151255 <https://github.com/llvm/llvm-project/pull/151255>`_) +* Added support for Integrated Distributed ThinLTO. + (`#148594 <https://github.com/llvm/llvm-project/pull/148594>`_) +* Added ``-prefetch-inputs`` to improve link times by asynchronously + loading input files in RAM. (`#169224 <https://github.com/llvm/llvm-project/pull/169224>`_) +* Added more ``--time-trace`` tags for ThinLTO linking. + (`#156471 <https://github.com/llvm/llvm-project/pull/156471>`_) +* ``/summary`` now works when ``/debug`` isn't provided. + (`#157476 <https://github.com/llvm/llvm-project/pull/157476>`_) +* ``/summary`` now displays the size of all consumed inputs. + (`#157284 <https://github.com/llvm/llvm-project/pull/157284>`_) +* Loop and SLP vectorize options are now passed to the LTO backend. + (`#173041 <https://github.com/llvm/llvm-project/pull/173041>`_) +* Fixed implicit DLL entry point for MinGW. + (`#171680 <https://github.com/llvm/llvm-project/pull/171680>`_) +* Fixed manifest UAC trustInfo namespace. + (`#165285 <https://github.com/llvm/llvm-project/pull/165285>`_) +* Fixed AArch64 delayimport of sret arguments. + (`#163096 <https://github.com/llvm/llvm-project/pull/163096>`_) +* Fixed tailMergeARM64 delayload thunk 128 MB range limitation. + (`#161844 <https://github.com/llvm/llvm-project/pull/161844>`_) +* Fixed symbol names for import thunks. + (`#160694 <https://github.com/llvm/llvm-project/pull/160694>`_) +* Deduplicate common chunks when linking COFF files. + (`#162553 <https://github.com/llvm/llvm-project/pull/162553>`_) +* Aligned EC code ranges to page boundaries. + (`#168222 <https://github.com/llvm/llvm-project/pull/168222>`_) +* Discard ``.llvmbc`` and ``.llvmcmd`` sections. + (`#150897 <https://github.com/llvm/llvm-project/pull/150897>`_) +* Fixed resolving symbols with ``-alternatename`` when the target is undefined. + (`#149496 <https://github.com/llvm/llvm-project/pull/149496>`_) +* Fixed ``/wholearchive`` thin-archive member identifiers to be consistent. + (`#145487 <https://github.com/llvm/llvm-project/pull/145487>`_) +* Prevent emitting relocations for discarded weak wrapped symbols. + (`#156214 <https://github.com/llvm/llvm-project/pull/156214>`_) MinGW Improvements ------------------ +* Added ``--fat-lto-objects`` flag. + (`#174962 <https://github.com/llvm/llvm-project/pull/174962>`_) +* Handle MIPS machine. + (`#157742 <https://github.com/llvm/llvm-project/pull/157742>`_) + MachO Improvements ------------------ -* ``--separate-cstring-literal-sections`` emits cstring literal sections into sections defined by their section name. - (`#158720 <https://github.com/llvm/llvm-project/pull/158720>`_) -* ``--tail-merge-strings`` enables tail merging of cstring literals. +* Added ``--read-workers=<N>`` for multi-threaded preload of input files + into memory, significantly reducing link times for large projects. + (`#147134 <https://github.com/llvm/llvm-project/pull/147134>`_) +* Added ``--tail-merge-strings`` to enable tail merging of cstrings. (`#161262 <https://github.com/llvm/llvm-project/pull/161262>`_) +* Added ``--separate-cstring-literal-sections`` to emit cstring literals + into sections defined by their section name. + (`#158720 <https://github.com/llvm/llvm-project/pull/158720>`_) +* Added ``--lto-emit-llvm`` command line option. +* Added ``--slop-scale`` flag for adjusting slop scale. + (`#164295 <https://github.com/llvm/llvm-project/pull/164295>`_) +* Added support for section branch relocations, including the 1-byte form. + (`#169062 <https://github.com/llvm/llvm-project/pull/169062>`_) +* Enabled Linker Optimization Hints pass for arm64_32. + (`#148964 <https://github.com/llvm/llvm-project/pull/148964>`_) +* Read cstring order for non-deduped sections. + (`#161879 <https://github.com/llvm/llvm-project/pull/161879>`_) +* Allow independent override of weak symbols aliased via ``.set``. + (`#167825 <https://github.com/llvm/llvm-project/pull/167825>`_) +* Fixed segfault while processing malformed object file. + (`#167025 <https://github.com/llvm/llvm-project/pull/167025>`_) +* Fixed infinite recursion when parsing corrupted export tries. + (`#152569 <https://github.com/llvm/llvm-project/pull/152569>`_) +* Error out gracefully when offset is outside literal section. + (`#164660 <https://github.com/llvm/llvm-project/pull/164660>`_) +* Process OSO prefix only textually in both input and output. + (`#152063 <https://github.com/llvm/llvm-project/pull/152063>`_) WebAssembly Improvements ------------------------ -* The ``--stack-first`` flag is now enabled by default. The old - behavior can be enabled using ``--no-stack-first``. +* ``--stack-first`` is now the default. Use ``--no-stack-first`` for the + old behavior. + (`#166998 <https://github.com/llvm/llvm-project/pull/166998>`_) +* ``--import-memory`` can now take a single name (imports from default module). + (`#160409 <https://github.com/llvm/llvm-project/pull/160409>`_) +* ``-r`` now forces ``-Bstatic``. + (`#108264 <https://github.com/llvm/llvm-project/pull/108264>`_) +* LTO now uses PIC reloc model with dynamic imports. + (`#165342 <https://github.com/llvm/llvm-project/pull/165342>`_) +* Honor command line reloc model during LTO. + (`#164838 <https://github.com/llvm/llvm-project/pull/164838>`_) +* Fixed visibility of ``__stack_pointer`` global. + (`#161284 <https://github.com/llvm/llvm-project/pull/161284>`_) +* Fixed check for exporting mutable globals. + (`#160787 <https://github.com/llvm/llvm-project/pull/160787>`_) +* Fixed check for implicitly exported mutable globals. + (`#160966 <https://github.com/llvm/llvm-project/pull/160966>`_) +* Don't export deps for unused stub symbols. + (`#173422 <https://github.com/llvm/llvm-project/pull/173422>`_) +* Fixed SEGFAULT when importing wrapped symbol. + (`#169656 <https://github.com/llvm/llvm-project/pull/169656>`_) +* Error on unexpected relocation types in ``-pie``/``-shared`` data sections. + (`#162117 <https://github.com/llvm/llvm-project/pull/162117>`_) Fixes ##### >From 03614471a7edf4b66dba9b5ff314558c34c9c352 Mon Sep 17 00:00:00 2001 From: Fangrui Song <[email protected]> Date: Wed, 21 Jan 2026 08:47:18 -0800 Subject: [PATCH 2/3] dtlto --- lld/docs/ReleaseNotes.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst index f7dece16bac10..5e7145d075e10 100644 --- a/lld/docs/ReleaseNotes.rst +++ b/lld/docs/ReleaseNotes.rst @@ -47,6 +47,9 @@ ELF Improvements * DTLTO now supports archive members and bitcode members of thin archives. (`#157043 <https://github.com/llvm/llvm-project/pull/157043>`_) (`#149425 <https://github.com/llvm/llvm-project/pull/149425>`_) +* For DTLTO, ``--thinlto-remote-compiler-prepend-arg=<arg>`` has been added to + prepend an argument to the remote compiler's command line. + (`#162456 <https://github.com/llvm/llvm-project/pull/162456>`_) * Balanced Partitioning (BP) section ordering now skips input sections with null data, and filters out section symbols. (`#149265 <https://github.com/llvm/llvm-project/pull/149265>`_) @@ -118,6 +121,9 @@ COFF Improvements (`#169224 <https://github.com/llvm/llvm-project/pull/169224>`_) * Added more ``--time-trace`` tags for ThinLTO linking. (`#156471 <https://github.com/llvm/llvm-project/pull/156471>`_) +* For DTLTO, ``/thinlto-remote-compiler-prepend-arg:<arg>`` has been added to + prepend an argument to the remote compiler's command line. + (`#162456 <https://github.com/llvm/llvm-project/pull/162456>`_) * ``/summary`` now works when ``/debug`` isn't provided. (`#157476 <https://github.com/llvm/llvm-project/pull/157476>`_) * ``/summary`` now displays the size of all consumed inputs. >From fe0ce9588b058bcd03cac3c7ae16ebc069b0aa29 Mon Sep 17 00:00:00 2001 From: Fangrui Song <[email protected]> Date: Wed, 21 Jan 2026 08:50:09 -0800 Subject: [PATCH 3/3] mips --- lld/docs/ReleaseNotes.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst index 5e7145d075e10..a560ed03c0a4d 100644 --- a/lld/docs/ReleaseNotes.rst +++ b/lld/docs/ReleaseNotes.rst @@ -158,7 +158,7 @@ MinGW Improvements * Added ``--fat-lto-objects`` flag. (`#174962 <https://github.com/llvm/llvm-project/pull/174962>`_) -* Handle MIPS machine. +* Handle ``-m mipspe`` for MIPS. (`#157742 <https://github.com/llvm/llvm-project/pull/157742>`_) MachO Improvements _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
