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LLVM 3.8 Release Notes

Warning

These are in-progress notes for the upcoming LLVM 3.8 release. You may prefer the LLVM 3.7 Release Notes.

Introduction

This document contains the release notes for the LLVM Compiler Infrastructure, 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.

For more information about LLVM, including information about the latest release, please check out the main LLVM web site. If you have questions or comments, the LLVM Developer's Mailing List is a good place to send them.

Note that if you are reading this file from a Subversion checkout or the main LLVM web page, this document applies to the next release, not the current one. To see the release notes for a specific release, please see the releases page.

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.

  • 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

  • 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

    • Doesn't take an unused parameter.
    • Destroys the source instead of only damaging it.
    • Does not record a message. Use the diagnostic handler instead.

  • 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.

  • The deprecated C APIs LLVMGetBitcodeModuleProviderInContext and LLVMGetBitcodeModuleProvider have been removed.

  • The deprecated C APIs LLVMCreateExecutionEngine, LLVMCreateInterpreter, LLVMCreateJITCompiler, LLVMAddModuleProvider and LLVMRemoveModuleProvider have been removed.

  • 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.

  • ... next change ...

Changes to the ARM Backend

During this release ...

Changes to the MIPS Target

During this release ...

Changes to the PowerPC Target

During this release ...

Changes to the X86 Target

During this release ...
  • TLS is enabled for Cygwin as emutls.

Changes to the OCaml bindings

During this release ...
  • The ocaml function link_modules has been replaced with link_modules' which uses LLVMLinkModules2.

External Open Source Projects Using LLVM 3.8

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

A wide variety of additional information is available on the LLVM web page, in particular in the documentation section. The web page also contains versions of the API documentation which is up-to-date with the Subversion version of the source code. You can access versions of these documents specific to this release by going into the llvm/docs/ directory in the LLVM tree.

If you have any questions or comments about LLVM, please feel free to contact us via the mailing lists.