[llvm-branch-commits] [lld] [llvm] ReleaseNotes: add lld/ELF notes (PR #80393)

[Fangrui Song via llvm-branch-commits]

https://github.com/MaskRay updated https://github.com/llvm/llvm-project/pull/80393

>From fc64e65d2af33f237a16c55d2730bd615157213c Mon Sep 17 00:00:00 2001
From: Fangrui Song <i at maskray.me>
Date: Thu, 1 Feb 2024 22:04:49 -0800
Subject: [PATCH 1/2] ReleaseNotes: add lld/ELF notes

---
 lld/docs/ReleaseNotes.rst | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst
index 01669543cd50c..824cc6f56f8d5 100644
--- a/lld/docs/ReleaseNotes.rst
+++ b/lld/docs/ReleaseNotes.rst
@@ -29,8 +29,42 @@ ELF Improvements
 * ``--fat-lto-objects`` option is added to support LLVM FatLTO.
   Without ``--fat-lto-objects``, LLD will link LLVM FatLTO objects using the
   relocatable object file. (`D146778 <https://reviews.llvm.org/D146778>`_)
+* ``-Bsymbolic-non-weak`` is added to directly bind non-weak definitions.
+  (`D158322 <https://reviews.llvm.org/D158322>`_)
+* ``--lto-validate-all-vtables-have-type-infos``, which complements
+  ``--lto-whole-program-visibility``, is added to disable unsafe whole-program
+  devirtualization. ``--lto-known-safe-vtables=<glob>`` can be used
+  to mark known-safe vtable symbols.
+  (`D155659 <https://reviews.llvm.org/D155659>`_)
+* ``--no-allow-shlib-undefined`` now reports errors for DSO referencing
+  non-exported definitions.
+  (`#70769 <https://github.com/llvm/llvm-project/pull/70769>`_)
 * common-page-size can now be larger than the system page-size.
   (`#57618 <https://github.com/llvm/llvm-project/issues/57618>`_)
+* When call graph profile information is availablue due to instrumentation or
+  sample PGO, input sections are now sorted using the new ``cdsort`` algorithm,
+  better than the previous ``hfsort`` algorithm.
+  (`D152840 <https://reviews.llvm.org/D152840>`_)
+* Symbol assignments like ``a = DEFINED(a) ? a : 0;`` are now handled.
+  (`#65866 <https://github.com/llvm/llvm-project/pull/65866>`_)
+* ``OVERLAY`` now supports optional start address and LMA
+  (`#77272 <https://github.com/llvm/llvm-project/pull/77272>`_)
+* Relocations referencing a symbol defined in ``/DISCARD/`` section now lead to
+  an error.
+  (`#69295 <https://github.com/llvm/llvm-project/pull/69295>`_)
+* For AArch64 MTE, global variable descriptors have been implemented.
+  (`D152921 <https://reviews.llvm.org/D152921>`_)
+* ``R_LARCH_PCREL20_S2``/``R_LARCH_ADD6``/``R_LARCH_CALL36`` and extreme code
+  model relocations are now supported.
+* ``--emit-relocs`` is now supported for RISC-V linker relaxation.
+  (`D159082 <https://reviews.llvm.org/D159082>`_)
+* Call relaxation respects RVC when mixing +c and -c relocatable files.
+  (`#73977 <https://github.com/llvm/llvm-project/pull/73977>`_)
+* ``R_RISCV_SET_ULEB128``/``R_RISCV_SUB_ULEB128`` relocations are now supported.
+  (`#72610 <https://github.com/llvm/llvm-project/pull/72610>`_)
+  (`#77261 <https://github.com/llvm/llvm-project/pull/77261>`_)
+* RISC-V TLSDESC is now supported.
+  (`#79239 <https://github.com/llvm/llvm-project/pull/79239>`_)
 
 Breaking changes
 ----------------

>From d35cb97c6c2552ea0e20842c0e65fa2dec44bd9a Mon Sep 17 00:00:00 2001
From: Fangrui Song <i at maskray.me>
Date: Fri, 2 Feb 2024 12:58:10 -0800
Subject: [PATCH 2/2] add more entries

---
 lld/docs/ReleaseNotes.rst | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst
index 824cc6f56f8d5..21a075ad8c4ef 100644
--- a/lld/docs/ReleaseNotes.rst
+++ b/lld/docs/ReleaseNotes.rst
@@ -36,12 +36,16 @@ ELF Improvements
   devirtualization. ``--lto-known-safe-vtables=<glob>`` can be used
   to mark known-safe vtable symbols.
   (`D155659 <https://reviews.llvm.org/D155659>`_)
+* ``--save-temps --lto-emit-asm`` now derives ELF/asm file names from bitcode file names.
+  ``ld.lld --save-temps a.o d/b.o -o out`` will create ELF relocatable files
+  ``out.lto.a.o``/``d/out.lto.b.o`` instead of ``out1.lto.o``/``out2.lto.o``.
+  (`#78835 <https://github.com/llvm/llvm-project/pull/78835>`_)
 * ``--no-allow-shlib-undefined`` now reports errors for DSO referencing
   non-exported definitions.
   (`#70769 <https://github.com/llvm/llvm-project/pull/70769>`_)
 * common-page-size can now be larger than the system page-size.
   (`#57618 <https://github.com/llvm/llvm-project/issues/57618>`_)
-* When call graph profile information is availablue due to instrumentation or
+* When call graph profile information is available due to instrumentation or
   sample PGO, input sections are now sorted using the new ``cdsort`` algorithm,
   better than the previous ``hfsort`` algorithm.
   (`D152840 <https://reviews.llvm.org/D152840>`_)
@@ -54,12 +58,16 @@ ELF Improvements
   (`#69295 <https://github.com/llvm/llvm-project/pull/69295>`_)
 * For AArch64 MTE, global variable descriptors have been implemented.
   (`D152921 <https://reviews.llvm.org/D152921>`_)
+* ``R_AARCH64_GOTPCREL32`` is now supported.
+  (`#72584 <https://github.com/llvm/llvm-project/pull/72584>`_)
 * ``R_LARCH_PCREL20_S2``/``R_LARCH_ADD6``/``R_LARCH_CALL36`` and extreme code
   model relocations are now supported.
 * ``--emit-relocs`` is now supported for RISC-V linker relaxation.
   (`D159082 <https://reviews.llvm.org/D159082>`_)
 * Call relaxation respects RVC when mixing +c and -c relocatable files.
   (`#73977 <https://github.com/llvm/llvm-project/pull/73977>`_)
+* ``R_RISCV_GOT32_PCREL`` is now supported.
+  (`#72587 <https://github.com/llvm/llvm-project/pull/72587>`_)
 * ``R_RISCV_SET_ULEB128``/``R_RISCV_SUB_ULEB128`` relocations are now supported.
   (`#72610 <https://github.com/llvm/llvm-project/pull/72610>`_)
   (`#77261 <https://github.com/llvm/llvm-project/pull/77261>`_)