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Vendor import of llvm 3.8.0 release r262564:
https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_380/final@262564
This commit is contained in:
Dimitry Andric
parent
d9c9bd8485
commit
f0f4822ed4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/vendor/llvm/dist/; revision=296358 svn path=/vendor/llvm/llvm-release_380-r262564/; revision=296359; tag=vendor/llvm/llvm-release_380-r262564
@ -31,25 +31,30 @@ Non-comprehensive list of changes in this release
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in the 3.9 release. Please migrate to using CMake. For more information see:
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`Building LLVM with CMake <CMake.html>`_
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* The C API function LLVMLinkModules is deprecated. It will be removed in the
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3.9 release. Please migrate to LLVMLinkModules2. Unlike the old function the
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* We have documented our C API stability guarantees for both development and
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release branches, as well as documented how to extend the C API. Please see
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the `developer documentation <DeveloperPolicy.html#c-api-changes>`_ for more
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information.
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* The C API function ``LLVMLinkModules`` is deprecated. It will be removed in the
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3.9 release. Please migrate to ``LLVMLinkModules2``. Unlike the old function the
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new one
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* Doesn't take an unused parameter.
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* Destroys the source instead of only damaging it.
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* Does not record a message. Use the diagnostic handler instead.
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* The C API functions LLVMParseBitcode, LLVMParseBitcodeInContext,
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LLVMGetBitcodeModuleInContext and LLVMGetBitcodeModule have been deprecated.
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* The C API functions ``LLVMParseBitcode``, ``LLVMParseBitcodeInContext``,
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``LLVMGetBitcodeModuleInContext`` and ``LLVMGetBitcodeModule`` have been deprecated.
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They will be removed in 3.9. Please migrate to the versions with a 2 suffix.
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Unlike the old ones the new ones do not record a diagnostic message. Use
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the diagnostic handler instead.
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* The deprecated C APIs LLVMGetBitcodeModuleProviderInContext and
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LLVMGetBitcodeModuleProvider have been removed.
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* The deprecated C APIs ``LLVMGetBitcodeModuleProviderInContext`` and
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``LLVMGetBitcodeModuleProvider`` have been removed.
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* The deprecated C APIs LLVMCreateExecutionEngine, LLVMCreateInterpreter,
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LLVMCreateJITCompiler, LLVMAddModuleProvider and LLVMRemoveModuleProvider
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* The deprecated C APIs ``LLVMCreateExecutionEngine``, ``LLVMCreateInterpreter``,
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``LLVMCreateJITCompiler``, ``LLVMAddModuleProvider`` and ``LLVMRemoveModuleProvider``
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have been removed.
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* With this release, the C API headers have been reorganized to improve build
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@ -58,21 +63,21 @@ Non-comprehensive list of changes in this release
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Core.h so nothing should change for projects directly including the headers,
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but transitive dependencies may be affected.
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* llvm-ar now suports thin archives.
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* llvm-ar now supports thin archives.
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* llvm doesn't produce .data.rel.ro.local or .data.rel sections anymore.
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* llvm doesn't produce ``.data.rel.ro.local`` or ``.data.rel`` sections anymore.
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* aliases to available_externally globals are now rejected by the verifier.
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* Aliases to ``available_externally`` globals are now rejected by the verifier.
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* the IR Linker has been split into IRMover that moves bits from one module to
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* The IR Linker has been split into ``IRMover`` that moves bits from one module to
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another and Linker proper that decides what to link.
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* Support for dematerializing has been dropped.
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* RegisterScheduler::setDefault was removed. Targets that used to call into the
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command line parser to set the DAGScheduler, and that don't have enough
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control with setSchedulingPreference, should look into overriding the
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SubTargetHook "getDAGScheduler()".
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* ``RegisterScheduler::setDefault`` was removed. Targets that used to call into the
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command line parser to set the ``DAGScheduler``, and that don't have enough
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control with ``setSchedulingPreference``, should look into overriding the
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``SubTargetHook`` "``getDAGScheduler()``".
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* ``ilist_iterator<T>`` no longer has implicit conversions to and from ``T*``,
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since ``ilist_iterator<T>`` may be pointing at the sentinel (which is usually
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@ -84,7 +89,7 @@ Non-comprehensive list of changes in this release
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* ``ilist_node<T>::getNextNode()`` and ``ilist_node<T>::getPrevNode()`` now
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fail at compile time when the node cannot access its parent list.
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Previously, when the sentinel was was an ``ilist_half_node<T>``, this API
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could return the sentinal instead of ``nullptr``. Frustrated callers should
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could return the sentinel instead of ``nullptr``. Frustrated callers should
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be updated to use ``iplist<T>::getNextNode(T*)`` instead. Alternatively, if
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the node ``N`` is guaranteed not to be the last in the list, it is safe to
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call ``&*++N->getIterator()`` directly.
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@ -106,32 +111,13 @@ Non-comprehensive list of changes in this release
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variables are converted to calls to ``__emutls_get_address`` in the runtime
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library.
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* MSVC compatible exception handling has been completely overhauled. New
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* MSVC-compatible exception handling has been completely overhauled. New
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instructions have been introduced to facilitate this:
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`New exception handling instructions <ExceptionHandling.html#new-exception-handling-instructions>`_.
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While we have done our best to test this feature thoroughly, it would
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not be completely surprising if there were a few lingering issues that
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early adopters might bump into.
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.. NOTE
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For small 1-3 sentence descriptions, just add an entry at the end of
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this list. If your description won't fit comfortably in one bullet
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point (e.g. maybe you would like to give an example of the
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functionality, or simply have a lot to talk about), see the `NOTE` below
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for adding a new subsection.
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* ... next change ...
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.. NOTE
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If you would like to document a larger change, then you can add a
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subsection about it right here. You can copy the following boilerplate
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and un-indent it (the indentation causes it to be inside this comment).
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Special New Feature
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-------------------
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Makes programs 10x faster by doing Special New Thing.
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Changes to the ARM Backends
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---------------------------
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@ -160,7 +146,7 @@ During this release the ARM target has:
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* Gained some additional code size improvements, though there's still a long road
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ahead, especially for older cores.
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* Added some EABI floating point comparison functions to Compiler-RT
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* Added support for Windows+GNU triple, +features in -mcpu/-march options.
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* Added support for Windows+GNU triple, ``+features`` in ``-mcpu``/``-march`` options.
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Changes to the MIPS Target
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@ -177,10 +163,10 @@ During this release the MIPS target has:
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* Added support for the ``ERETNC`` instruction found in MIPS32R5 and later.
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* Added support for OpenCL. See http://portablecl.org/.
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* Address spaces 1 to 255 are now reserved for software use and conversions
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between them are no-op casts.
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* Address spaces 1 to 255 are now reserved for software use and conversions
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between them are no-op casts.
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* Removed the ``mips16`` value for the -mcpu option since it is an :abbr:`ASE
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* Removed the ``mips16`` value for the ``-mcpu`` option since it is an :abbr:`ASE
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(Application Specific Extension)` and not a processor. If you were using this,
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please specify another CPU and use ``-mips16`` to enable MIPS16.
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* Removed ``copy_u.w`` from 32-bit MSA and ``copy_u.d`` from 64-bit MSA since
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@ -212,8 +198,6 @@ fixes:
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* Added support for atomic load and atomic store.
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* Corrected debug info when dynamically re-aligning the stack.
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Integrated Assembler
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^^^^^^^^^^^^^^^^^^^^
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We have made a large number of improvements to the integrated assembler for
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MIPS. In this release, the integrated assembler isn't quite production-ready
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since there are a few known issues related to bare-metal support, checking
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@ -227,14 +211,31 @@ If you would like to try the integrated assembler, please use
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Changes to the PowerPC Target
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-----------------------------
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During this release ...
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There are numerous improvements to the PowerPC target in this release:
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* Shrink wrapping optimization has been enabled for PowerPC Little Endian
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* Direct move instructions are used when converting scalars to vectors
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* Thread Sanitizer (TSAN) is now supported for PowerPC
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* New MI peephole pass to clean up redundant XXPERMDI instructions
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* Add branch hints to highly biased branch instructions (code reaching
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unreachable terminators and exceptional control flow constructs)
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* Promote boolean return values to integer to prevent excessive usage of
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condition registers
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* Additional vector APIs for vector comparisons and vector merges have been
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added to altivec.h
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* Many bugs have been identified and fixed
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Changes to the X86 Target
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-----------------------------
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During this release ...
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* TLS is enabled for Cygwin as emutls.
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* Smaller code for materializing 32-bit 1 and -1 constants at ``-Os``.
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@ -262,8 +263,6 @@ road to being completely merged and workable.
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Changes to the OCaml bindings
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-----------------------------
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During this release ...
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* The ocaml function link_modules has been replaced with link_modules' which
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uses LLVMLinkModules2.
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@ -302,4 +301,3 @@ going into the ``llvm/docs/`` directory in the LLVM tree.
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If you have any questions or comments about LLVM, please feel free to contact
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us via the `mailing lists <http://llvm.org/docs/#maillist>`_.
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@ -1,11 +1,6 @@
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Overview
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========
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.. warning::
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If you are using a released version of LLVM, see `the download page
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<http://llvm.org/releases/>`_ to find your documentation.
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The LLVM compiler infrastructure supports a wide range of projects, from
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industrial strength compilers to specialized JIT applications to small
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research projects.
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