X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=docs%2FReleaseNotes.rst;h=b3f7c005ed1914ff9aa75c01c78d12700abb33e8;hp=56e93889858a4afe42996ee893afc3b095bdd436;hb=d644801757bb1e2ad6a7a9715b3e57288c197ada;hpb=d4ca466ed602b47ab47fde6c78d640d80d2b1e7b diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index 56e93889858..b3f7c005ed1 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -1,13 +1,13 @@ ====================== -LLVM 3.6 Release Notes +LLVM 3.8 Release Notes ====================== .. contents:: :local: .. warning:: - These are in-progress notes for the upcoming LLVM 3.6 release. You may - prefer the `LLVM 3.5 Release Notes `_. @@ -15,7 +15,7 @@ Introduction ============ This document contains the release notes for the LLVM Compiler Infrastructure, -release 3.6. 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 `_. @@ -23,7 +23,7 @@ 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 +`_ is a good place to send them. Note that if you are reading this file from a Subversion checkout or the main @@ -33,6 +33,40 @@ 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. .. NOTE For small 1-3 sentence descriptions, just add an entry at the end of @@ -41,11 +75,6 @@ Non-comprehensive list of changes in this release functionality, or simply have a lot to talk about), see the `NOTE` below for adding a new subsection. -* Support for AuroraUX has been removed. - -* Added support for a `native object file-based bitcode wrapper format - `_. - * ... next change ... .. NOTE @@ -58,72 +87,47 @@ Non-comprehensive list of changes in this release Makes programs 10x faster by doing Special New Thing. -Prefix data rework ------------------- - -The semantics of the ``prefix`` attribute have been changed. Users -that want the previous ``prefix`` semantics should instead use -``prologue``. To motivate this change, let's examine the primary -usecases that these attributes aim to serve, - - 1. Code sanitization metadata (e.g. Clang's undefined behavior - sanitizer) - - 2. Function hot-patching: Enable the user to insert ``nop`` operations - at the beginning of the function which can later be safely replaced - with a call to some instrumentation facility. +Changes to the ARM Backend +-------------------------- - 3. Language runtime metadata: Allow a compiler to insert data for - use by the runtime during execution. GHC is one example of a - compiler that needs this functionality for its - tables-next-to-code functionality. + During this release ... -Previously ``prefix`` served cases (1) and (2) quite well by allowing the user -to introduce arbitrary data at the entrypoint but before the function -body. Case (3), however, was poorly handled by this approach as it -required that prefix data was valid executable code. -In this release the concept of prefix data has been redefined to be -data which occurs immediately before the function entrypoint (i.e. the -symbol address). Since prefix data now occurs before the function -entrypoint, there is no need for the data to be valid code. +Changes to the MIPS Target +-------------------------- -The previous notion of prefix data now goes under the name "prologue -data" to emphasize its duality with the function epilogue. + During this release ... -The intention here is to handle cases (1) and (2) with prologue data and -case (3) with prefix data. See the language reference for further details -on the semantics of these attributes. -This refactoring arose out of discussions_ with Reid Kleckner in -response to a proposal to introduce the notion of symbol offsets to -enable handling of case (3). +Changes to the PowerPC Target +----------------------------- -.. _discussions: http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-May/073235.html + During this release ... -Changes to the ARM Backend --------------------------- +Changes to the X86 Target +----------------------------- During this release ... +* TLS is enabled for Cygwin as emutls. -Changes to the MIPS Target --------------------------- -During this release ... - -Changes to the PowerPC Target +Changes to the OCaml bindings ----------------------------- -During this release ... + During this release ... + +* The ocaml function link_modules has been replaced with link_modules' which + uses LLVMLinkModules2. + -External Open Source Projects Using LLVM 3.6 +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 3.6. +projects that have already been updated to work with LLVM 3.8. * A project