======================
-LLVM 3.3 Release Notes
+LLVM 3.8 Release Notes
======================
.. contents::
:local:
.. warning::
- These are in-progress notes for the upcoming LLVM 3.3 release. You may
- prefer the `LLVM 3.2 Release Notes <http://llvm.org/releases/3.2/docs
+ These are in-progress notes for the upcoming LLVM 3.8 release. You may
+ prefer the `LLVM 3.7 Release Notes <http://llvm.org/releases/3.7.0/docs
/ReleaseNotes.html>`_.
============
This document contains the release notes for the LLVM Compiler Infrastructure,
-release 3.3. Here we describe the status of LLVM, including major improvements
+release 3.8. Here we describe the status of LLVM, including major improvements
from the previous release, improvements in various subprojects of LLVM, and
some of the current users of the code. All LLVM releases may be downloaded
from the `LLVM releases web site <http://llvm.org/releases/>`_.
For more information about LLVM, including information about the latest
release, please check out the `main LLVM web site <http://llvm.org/>`_. If you
have questions or comments, the `LLVM Developer's Mailing List
-<http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev>`_ is a good place to send
+<http://lists.llvm.org/mailman/listinfo/llvm-dev>`_ is a good place to send
them.
Note that if you are reading this file from a Subversion checkout or the main
Non-comprehensive list of changes in this release
=================================================
+* With this release, the minimum Windows version required for running LLVM is
+ Windows 7. Earlier versions, including Windows Vista and XP are no longer
+ supported.
-.. NOTE
- For small 1-3 sentence descriptions, just add an entry at the end of
- this list. If your description won't fit comfortably in one bullet
- point (e.g. maybe you would like to give an example of the
- functionality, or simply have a lot to talk about), see the `NOTE` below
- for adding a new subsection.
+* With this release, the autoconf build system is deprecated. It will be removed
+ in the 3.9 release. Please migrate to using CMake. For more information see:
+ `Building LLVM with CMake <CMake.html>`_
-* The CellSPU port has been removed. It can still be found in older versions.
+* The C API function LLVMLinkModules is deprecated. It will be removed in the
+ 3.9 release. Please migrate to LLVMLinkModules2. Unlike the old function the
+ new one
-* The IR-level extended linker APIs (for example, to link bitcode files out of
- archives) have been removed. Any existing clients of these features should
- move to using a linker with integrated LTO support.
+ * Doesn't take an unused parameter.
+ * Destroys the source instead of only damaging it.
+ * Does not record a message. Use the diagnostic handler instead.
-* LLVM and Clang's documentation has been migrated to the `Sphinx
- <http://sphinx-doc.org/>`_ documentation generation system which uses
- easy-to-write reStructuredText. See `llvm/docs/README.txt` for more
- information.
+* The C API functions LLVMParseBitcode, LLVMParseBitcodeInContext,
+ LLVMGetBitcodeModuleInContext and LLVMGetBitcodeModule have been deprecated.
+ They will be removed in 3.9. Please migrate to the versions with a 2 suffix.
+ Unlike the old ones the new ones do not record a diagnostic message. Use
+ the diagnostic handler instead.
-* TargetTransformInfo (TTI) is a new interface that can be used by IR-level
- passes to obtain target-specific information, such as the costs of
- instructions. Only "Lowering" passes such as LSR and the vectorizer are
- allowed to use the TTI infrastructure.
+* The deprecated C APIs LLVMGetBitcodeModuleProviderInContext and
+ LLVMGetBitcodeModuleProvider have been removed.
-* We've improved the X86 and ARM cost model.
+* The deprecated C APIs LLVMCreateExecutionEngine, LLVMCreateInterpreter,
+ LLVMCreateJITCompiler, LLVMAddModuleProvider and LLVMRemoveModuleProvider
+ have been removed.
-* The Attributes classes have been completely rewritten and expanded. They now
- support not only enumerated attributes and alignments, but "string"
- attributes, which are useful for passing information to code generation. See
- :doc:`HowToUseAttributes` for more details.
+* With this release, the C API headers have been reorganized to improve build
+ time. Type specific declarations have been moved to Type.h, and error
+ handling routines have been moved to ErrorHandling.h. Both are included in
+ Core.h so nothing should change for projects directly including the headers,
+ but transitive dependencies may be affected.
+
+.. NOTE
+ For small 1-3 sentence descriptions, just add an entry at the end of
+ this list. If your description won't fit comfortably in one bullet
+ point (e.g. maybe you would like to give an example of the
+ functionality, or simply have a lot to talk about), see the `NOTE` below
+ for adding a new subsection.
* ... next change ...
Makes programs 10x faster by doing Special New Thing.
-AArch64 target
---------------
+Changes to the ARM Backend
+--------------------------
+
+ During this release ...
+
+
+Changes to the MIPS Target
+--------------------------
+
+ During this release ...
+
+
+Changes to the PowerPC Target
+-----------------------------
+
+ During this release ...
+
-We've added support for AArch64, ARM's 64-bit architecture. Development is still
-in fairly early stages, but we expect successful compilation when:
+Changes to the X86 Target
+-----------------------------
-- compiling standard compliant C99 and C++03 with Clang;
-- using Linux as a target platform;
-- where code + static data doesn't exceed 4GB in size (heap allocated data has
- no limitation).
+ During this release ...
-Some additional functionality is also implemented, notably DWARF debugging,
-GNU-style thread local storage and inline assembly.
+* TLS is enabled for Cygwin as emutls.
-Hexagon Target
---------------
-- Removed support for legacy hexagonv2 and hexagonv3 processor
- architectures which are no longer in use. Currently supported
- architectures are hexagonv4 and hexagonv5.
+Changes to the OCaml bindings
+-----------------------------
-Loop Vectorizer
----------------
+ During this release ...
-We've continued the work on the loop vectorizer. The loop vectorizer now
-has the following features:
+* The ocaml function link_modules has been replaced with link_modules' which
+ uses LLVMLinkModules2.
-- Loops with unknown trip count.
-- Runtime checks of pointers
-- Reductions, Inductions
-- If Conversion
-- Pointer induction variables
-- Reverse iterators
-- Vectorization of mixed types
-- Vectorization of function calls
-- Partial unrolling during vectorization
-R600 Backend
-------------
+External Open Source Projects Using LLVM 3.8
+============================================
-The R600 backend was added in this release, it supports AMD GPUs
-(HD2XXX - HD7XXX). This backend is used in AMD's Open Source
-graphics / compute drivers which are developed as part of the `Mesa3D
-<http://www.mesa3d.org>`_ project.
+An exciting aspect of LLVM is that it is used as an enabling technology for
+a lot of other language and tools projects. This section lists some of the
+projects that have already been updated to work with LLVM 3.8.
+* A project
Additional Information
projects / oota-llvm.git / blobdiff