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More updates to relase notes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_32@170178 91177308-0d34-0410-b5e6-96231b3b80d8
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<p>This document contains the release notes for the LLVM Compiler
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Infrastructure, release 3.2. Here we describe the status of LLVM, including
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major improvements from the previous release, improvements in various
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subprojects of LLVM, and some of the current users of the code. All LLVM
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sub-projects of LLVM, and some of the current users of the code. All LLVM
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releases may be downloaded from the <a href="http://llvm.org/releases/">LLVM
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releases web site</a>.</p>
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@@ -71,7 +71,7 @@
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code generators and supporting tools, as well as Clang, DragonEgg and
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compiler-rt sub-project repositories. In addition to this code, the LLVM
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Project includes other sub-projects that are in development. Here we
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include updates on these subprojects.</p>
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include updates on these sub-projects.</p>
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<!--=========================================================================-->
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<h3>
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@@ -85,9 +85,7 @@
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experience through expressive diagnostics, a high level of conformance to
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language standards, fast compilation, and low memory use. Like LLVM, Clang
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provides a modular, library-based architecture that makes it suitable for
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creating or integrating with other development tools. Clang is considered a
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production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86
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(32- and 64-bit), and for Darwin/ARM targets.</p>
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creating or integrating with other development tools.</p>
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<p>In the LLVM 3.2 time-frame, the Clang team has made many improvements.
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Highlights include:</p>
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@@ -98,7 +96,7 @@
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</ul>
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<p>For more details about the changes to Clang since the 3.1 release, see the
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<a href="http://clang.llvm.org/docs/ReleaseNotes.html">Clang release
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<a href="http://llvm.org/releases/3.2/tools/clang/docs/ReleaseNotes.html">Clang 3.2 release
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notes.</a></p>
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<p>If Clang rejects your code but another compiler accepts it, please take a
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@@ -152,8 +150,8 @@
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<ul>
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<li><a href="http://llvm.org/releases/3.2/tools/clang/docs/ThreadSanitizer.html">ThreadSanitizer (TSan)</a> - data race detector run-time library for C/C++ has been added.</li>
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<li>Improvemens to <a href="http://llvm.org/releases/3.2/tools/clang/docs/AddressSanitizer.html">AddressSanitizer</a> including: increasing stack size limit to 256M,
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better portability (iOS6,Windows,Android NDK), support for cmake based builds, enhanced error reporting.</li>
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<li>Improvemens to <a href="http://llvm.org/releases/3.2/tools/clang/docs/AddressSanitizer.html">AddressSanitizer</a> including: increasing stack size limit to 256MB,
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better portability (Android NDK), support for cmake based builds, enhanced error reporting.</li>
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<li>Added support for A6 'Swift' CPU.</li>
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<li><code>divsi3</code> function has been enhanced to take advantage of a hardware unsigned divide when it is available.</li>
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@@ -230,19 +228,19 @@
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<p><a href="http://polly.llvm.org/">Polly</a> is an <em>experimental</em>
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optimizer for data locality and parallelism. It currently provides high-level
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loop optimizations and automatic parallelisation (using the OpenMP run time).
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loop optimizations and automatic parallelization (using the OpenMP run time).
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Work in the area of automatic SIMD and accelerator code generation was
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started.</p>
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<p>Within the LLVM 3.2 time-frame there were the following highlights:</p>
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<ul>
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<li>isl, the integer set library used by Polly, was relicensed to the MIT license</li>
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<li>isl based code generation</li>
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<li>MIT licensed replacement for CLooG (LGPLv2)</li>
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<li>Fine grained option handling (separation of core and border computations, control overhead vs. code size)</li>
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<li>Support for FORTRAN and dragonegg</li>
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<li>OpenMP code generation fixes</li>
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<li>isl, the integer set library used by Polly, was relicensed under the MIT license.</li>
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<li>isl based code generation.</li>
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<li>MIT licensed replacement for CLooG (LGPLv2).</li>
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<li>Fine grained option handling (separation of core and border computations, control overhead vs. code size).</li>
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<li>Support for FORTRAN and Dragonegg.</li>
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<li>OpenMP code generation fixes.</li>
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</ul>
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</div>
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@@ -282,7 +280,7 @@
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AUdio STream. Its programming model combines two approaches: functional
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programming and block diagram composition. In addition with the C, C++, Java,
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JavaScript output formats, the Faust compiler can generate LLVM bitcode, and
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works with LLVM 2.7-3.1.</p>
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works with LLVM 2.7-3.2.</p>
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</div>
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@@ -672,20 +670,18 @@
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<li>Support for Android MIPS toolchain has been added to clang driver.</li>
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<li>Added clang driver support for MIPS N32 ABI through "-mabi=n32" option.</li>
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<li>MIPS32 and MIPS64 disassembler has been implemented.</li>
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<li>Support for compiling programs with large GOTs (exceeding 64kB in size) has be added
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through llc option "-mxgot".</li>
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<li>Experimental support for MIPS32 DSP intrinsics has been added</li>
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<li>Support for compiling programs with large GOTs (exceeding 64kB in size) has been added
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through llc option "-mxgot".</li>
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<li>Added experimental support for MIPS32 DSP intrinsics.</li>
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<li>Experimental support for MIPS16 with following limitations: only soft float is supported,
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C++ exceptions are not supported, large stack frames (> 32000 bytes) are not supported,
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direct object code emission is not supported yet (only .s).</li>
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<li>Standalone assembler (llvm-mc): implementation is in progress and assembler should be
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considered experimental</li>
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direct object code emission is not supported only .s .</li>
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<li>Standalone assembler (llvm-mc): implementation is in progress and considered experimental.</li>
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<li>All classic JIT and MCJIT tests pass on Little and Big Endian MIPS32 platforms.</li>
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<li>Inline asm support: all common constraints and operand modifiers
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have been implemented.</li>
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<li>Tail call optimization support has been added, use llc option "-enable-mips-tail-calls"
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<li>Inline asm support: all common constraints and operand modifiers have been implemented.</li>
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<li>Added tail call optimization support, use llc option "-enable-mips-tail-calls"
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or clang options "-mllvm -enable-mips-tail-calls"to enable it.</li>
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<li>Improved register allocation by removing registers 'FP', 'GP', 'RA' and 'AT' from the list of reserved registers.</li>
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<li>Improved register allocation by removing registers $fp, $gp, $ra and $at from the list of reserved registers.</li>
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<li>Long branch expansion pass has been implemented, which expands branch
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instructions with offsets that do not fit in the 16-bit field.</li>
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<li>Cavium Octeon II board is used for testing builds (llvm-mips-linux builder).</li>
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@@ -777,9 +773,11 @@
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from the previous release.</p>
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<ul>
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<li>...</li>
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</ul>
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<li>llvm-ld and llvm-stub have been removed, llvm-ld functionality can be partially replaced by
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llvm-link | opt | {llc | as, llc -filetype=obj} | ld, or fully replaced by Clang. </li>
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<li>MCJIT: added support for inline assembly (requires asm parser), added faux remote target execution to lli option '-remote-mcjit'.</li>
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</ul>
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</div>
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<!--=========================================================================-->
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@@ -813,34 +811,22 @@ to remove a dependency on Target. </p>
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<div>
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<p>In addition, some tools have changed in this release. Some of the changes
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are:</p>
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<p>In addition, some tools have changed in this release. Some of the changes are:</p>
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<ul>
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<li>...</li>
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<li>opt: added support for '-mtriple' option.</li>
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<li>llvm-mc : - added '-disassemble' support for '-show-inst' and '-show-encoding' options, added '-edis' option to produce annotated
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disassembly output for X86 and ARM targets.</li>
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<li>libprofile: allows the profile data file name to be specified by the LLVMPROF_OUTPUT environment variable.</li>
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<li>llvm-objdump: has been changed to display available targets, '-arch' option accepts x86 and x86-64 as valid arch names.</li>
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<li>llc and opt: added FMA formation from pairs of FADD + FMUL or FSUB + FMUL enabled by option '-enable-excess-fp-precision' or option '-enable-unsafe-fp-math',
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option '-fp-contract' controls the creation by optimizations of fused FP by selecting Fast, Standard, or Strict mode.</li>
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<li>llc: object file output from llc is no longer considered experimental.</li>
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</ul>
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</div>
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<!--=========================================================================-->
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<h3>
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<a name="python">Python Bindings</a>
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</h3>
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<div>
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<p>Officially supported Python bindings have been added! Feature support is far
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from complete. The current bindings support interfaces to:</p>
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<ul>
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<li>...</li>
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</ul>
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</div>
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</div>
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<!-- *********************************************************************** -->
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<h2>
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<a name="knownproblems">Known Problems</a>
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@@ -861,7 +847,7 @@ to remove a dependency on Target. </p>
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<p>Known problem areas include:</p>
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<ul>
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<li>The CellSPU, MSP430, and XCore backends are experimental.</li>
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<li>The CellSPU, MSP430, and XCore backends are experimental, and the CellSPU backend will be removed in LLVM 3.3.</li>
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<li>The integrated assembler, disassembler, and JIT is not supported by
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several targets. If an integrated assembler is not supported, then a
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