Clear release notes for 18.x

Author: tru

clang-tools-extra/docs/ReleaseNotes.rst

@@ -24,31 +24,11 @@ page](https://llvm.org/releases/).
 
 ## Major New Features
 
-* Flang now supports loading LLVM pass plugins with the `-fpass-plugin` option
-  which is also available in clang. The option mimics the behavior of the
-  corresponding option in clang and has the same capabilities and limitations.
-* Flang also supports statically linked LLVM pass extensions. Projects can be
-  linked statically into `flang-new` if the cmake command includes
-  `-DLLVM_${NAME}_LINK_INTO_TOOLS=ON`. This behavior is also similar to clang.
-
 ## Bug Fixes
 
 ## Non-comprehensive list of changes in this release
-* The bash wrapper script, `flang`, is renamed as `flang-to-external-fc`.
-* In contrast to Clang, Flang will not default to using `-fpie` when linking
-  executables. This is only a temporary solution and the goal is to align with
-  Clang in the near future. First, however, the frontend driver needs to be
-  extended so that it can generate position independent code (that requires
-  adding support for e.g. `-fpic` and `-mrelocation-model` in `flang-new
-  -fc1`). Once that is available, support for the `-fpie` can officially be
-  added and the default behaviour updated.
 
 ## New Compiler Flags
-* Refined how `-f{no-}color-diagnostics` is treated to better align with Clang.
-  In particular, both `-fcolor-diagnostics` and `-fno-color-diagnostics` are
-  now available in `flang-new` (the diagnostics are formatted by default). In
-  the frontend driver, `flang-new -fc1`, only `-fcolor-diagnostics` is
-  available (by default, the diagnostics are not formatted).
 
 ## Windows Support
 
@@ -65,5 +45,5 @@ Flang's documentation is located in the `flang/docs/` directory in the
 LLVM monorepo.
 
 If you have any questions or comments about Flang, please feel free to
-contact us on the [Discourse 
+contact us on the [Discourse
 forums](https://discourse.llvm.org/c/subprojects/flang/33).

clang/docs/ReleaseNotes.rst

@@ -26,84 +26,12 @@ Non-comprehensive list of changes in this release
 ELF Improvements
 ----------------
 
-* When ``--threads=`` is not specified, the number of concurrency is now capped to 16.
-  A large ``--thread=`` can harm performance, especially with some system
-  malloc implementations like glibc's.
-  (`D147493 <https://reviews.llvm.org/D147493>`_)
-* ``--remap-inputs=`` and ``--remap-inputs-file=`` are added to remap input files.
-  (`D148859 <https://reviews.llvm.org/D148859>`_)
-* ``--lto=`` is now available to support ``clang -funified-lto``
-  (`D123805 <https://reviews.llvm.org/D123805>`_)
-* ``--lto-CGO[0-3]`` is now available to control ``CodeGenOpt::Level`` independent of the LTO optimization level.
-  (`D141970 <https://reviews.llvm.org/D141970>`_)
-* ``--check-dynamic-relocations=`` is now correct 32-bit targets when the addend is larger than 0x80000000.
-  (`D149347 <https://reviews.llvm.org/D149347>`_)
-* ``--print-memory-usage`` has been implemented for memory regions.
-  (`D150644 <https://reviews.llvm.org/D150644>`_)
-* ``SHF_MERGE``, ``--icf=``, and ``--build-id=fast`` have switched to 64-bit xxh3.
-  (`D154813 <https://reviews.llvm.org/D154813>`_)
-* Quoted output section names can now be used in linker scripts.
-  (`#60496 <https://github.com/llvm/llvm-project/issues/60496>`_)
-* ``MEMORY`` can now be used without a ``SECTIONS`` command.
-  (`D145132 <https://reviews.llvm.org/D145132>`_)
-* ``REVERSE`` can now be used in input section descriptions to reverse the order of input sections.
-  (`D145381 <https://reviews.llvm.org/D145381>`_)
-* Program header assignment can now be used within ``OVERLAY``. This functionality was accidentally lost in 2020.
-  (`D150445 <https://reviews.llvm.org/D150445>`_)
-* Operators ``^`` and ``^=`` can now be used in linker scripts.
-* LoongArch is now supported.
-* ``DT_AARCH64_MEMTAG_*`` dynamic tags are now supported.
-  (`D143769 <https://reviews.llvm.org/D143769>`_)
-* AArch32 port now supports BE-8 and BE-32 modes for big-endian.
-  (`D140201 <https://reviews.llvm.org/D140201>`_)
-  (`D140202 <https://reviews.llvm.org/D140202>`_)
-  (`D150870 <https://reviews.llvm.org/D150870>`_)
-* ``R_ARM_THM_ALU_ABS_G*`` relocations are now supported.
-  (`D153407 <https://reviews.llvm.org/D153407>`_)
-* ``.ARM.exidx`` sections may start at non-zero output section offset.
-  (`D148033 <https://reviews.llvm.org/D148033>`_)
-* Arm Cortex-M Security Extensions is now implemented.
-  (`D139092 <https://reviews.llvm.org/D139092>`_)
-* BTI landing pads are now added to PLT entries accessed by range extension thunks or relative vtables.
-  (`D148704 <https://reviews.llvm.org/D148704>`_)
-  (`D153264 <https://reviews.llvm.org/D153264>`_)
-* AArch64 short range thunk has been implemented to mitigate the performance loss of a long range thunk.
-  (`D148701 <https://reviews.llvm.org/D148701>`_)
-* ``R_AVR_8_LO8/R_AVR_8_HI8/R_AVR_8_HLO8/R_AVR_LO8_LDI_GS/R_AVR_HI8_LDI_GS`` have been implemented.
-  (`D147100 <https://reviews.llvm.org/D147100>`_)
-  (`D147364 <https://reviews.llvm.org/D147364>`_)
-* ``--no-power10-stubs`` now works for PowerPC64.
-* ``DT_PPC64_OPT`` is now supported;
-  (`D150631 <https://reviews.llvm.org/D150631>`_)
-* ``PT_RISCV_ATTRIBUTES`` is added to include the SHT_RISCV_ATTRIBUTES section.
-  (`D152065 <https://reviews.llvm.org/D152065>`_)
-* ``R_RISCV_PLT32`` is added to support C++ relative vtables.
-  (`D143115 <https://reviews.llvm.org/D143115>`_)
-* RISC-V global pointer relaxation has been implemented. Specify ``--relax-gp`` to enable the linker relaxation.
-  (`D143673 <https://reviews.llvm.org/D143673>`_)
-* The symbol value of ``foo`` is correctly handled when ``--wrap=foo`` and RISC-V linker relaxation are used.
-  (`D151768 <https://reviews.llvm.org/D151768>`_)
-* x86-64 large data sections are now placed away from code sections to alleviate relocation overflow pressure.
-  (`D150510 <https://reviews.llvm.org/D150510>`_)
-
 Breaking changes
 ----------------
 
 COFF Improvements
 -----------------
 
-* lld-link can now find libraries with relative paths that are relative to
-  `/libpath`. Before it would only be able to find libraries relative to the
-  current directory.
-  I.e. ``lld-link /libpath:c:\relative\root relative\path\my.lib`` where before
-  we would have to do ``lld-link /libpath:c:\relative\root\relative\path my.lib``
-* lld-link learned -print-search-paths that will print all the paths where it will
-  search for libraries.
-* By default lld-link will now search for libraries in the toolchain directories.
-  Specifically it will search:
-  ``<toolchain>/lib``, ``<toolchain>/lib/clang/<version>/lib`` and
-  ``<toolchain>/lib/clang/<version>/lib/windows``.
-
 MinGW Improvements
 ------------------
 
@@ -115,7 +43,3 @@ WebAssembly Improvements
 
 Fixes
 #####
-
-* Arm exception index tables (.ARM.exidx sections) are now output
-  correctly when they are at a non zero offset within their output
-  section. (`D148033 <https://reviews.llvm.org/D148033>`_)