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diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html index a84fabaccf..99bdf613a0 100644 --- a/docs/ReleaseNotes.html +++ b/docs/ReleaseNotes.html @@ -29,12 +29,6 @@ <p>Written by the <a href="http://llvm.org/">LLVM Team</a></p> </div> -<h1 style="color:red">These are in-progress notes for the upcoming LLVM 3.2 -release.<br> -You may prefer the -<a href="http://llvm.org/releases/3.1/docs/ReleaseNotes.html">LLVM 3.1 -Release Notes</a>.</h1> - <!-- *********************************************************************** --> <h2> <a name="intro">Introduction</a> @@ -46,7 +40,7 @@ Release Notes</a>.</h1> <p>This document contains the release notes for the LLVM Compiler Infrastructure, release 3.2. 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 + sub-projects of LLVM, and some of the current users of the code. All LLVM releases may be downloaded from the <a href="http://llvm.org/releases/">LLVM releases web site</a>.</p> @@ -77,7 +71,7 @@ Release Notes</a>.</h1> code generators and supporting tools, as well as Clang, DragonEgg and compiler-rt sub-project repositories. In addition to this code, the LLVM Project includes other sub-projects that are in development. Here we - include updates on these subprojects.</p> + include updates on these sub-projects.</p> <!--=========================================================================--> <h3> @@ -91,18 +85,18 @@ Release Notes</a>.</h1> experience through expressive diagnostics, a high level of conformance to language standards, fast compilation, and low memory use. Like LLVM, Clang provides a modular, library-based architecture that makes it suitable for - creating or integrating with other development tools. Clang is considered a - production-quality compiler for C, Objective-C, C++ and Objective-C++ on x86 - (32- and 64-bit), and for Darwin/ARM targets.</p> + creating or integrating with other development tools.</p> <p>In the LLVM 3.2 time-frame, the Clang team has made many improvements. Highlights include:</p> <ul> - <li>...</li> + <li>Improvements to Clang's diagnostics</li> + <li>Support for tls_model attribute</li> + <li>Type safety attributes</li> </ul> <p>For more details about the changes to Clang since the 3.1 release, see the - <a href="http://clang.llvm.org/docs/ReleaseNotes.html">Clang release + <a href="http://llvm.org/releases/3.2/tools/clang/docs/ReleaseNotes.html">Clang 3.2 release notes.</a></p> <p>If Clang rejects your code but another compiler accepts it, please take a @@ -142,7 +136,8 @@ Release Notes</a>.</h1> <div> -<p>The new LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a> + +<p>The LLVM <a href="http://compiler-rt.llvm.org/">compiler-rt project</a> is a simple library that provides an implementation of the low-level target-specific hooks required by code generation and other runtime components. For example, when compiling for a 32-bit target, converting a @@ -154,7 +149,12 @@ Release Notes</a>.</h1> <p>The 3.2 release has the following notable changes:</p> <ul> - <li>...</li> + <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> + <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, + better portability (Android NDK), support for cmake based builds, enhanced error reporting.</li> + + <li>Added support for A6 'Swift' CPU.</li> + <li><code>divsi3</code> function has been enhanced to take advantage of a hardware unsigned divide when it is available.</li> </ul> </div> @@ -228,14 +228,19 @@ Release Notes</a>.</h1> <p><a href="http://polly.llvm.org/">Polly</a> is an <em>experimental</em> optimizer for data locality and parallelism. It currently provides high-level - loop optimizations and automatic parallelisation (using the OpenMP run time). + loop optimizations and automatic parallelization (using the OpenMP run time). Work in the area of automatic SIMD and accelerator code generation was started.</p> <p>Within the LLVM 3.2 time-frame there were the following highlights:</p> <ul> - <li>...</li> + <li>isl, the integer set library used by Polly, was relicensed under the MIT license.</li> + <li>isl based code generation.</li> + <li>MIT licensed replacement for CLooG (LGPLv2).</li> + <li>Fine grained option handling (separation of core and border computations, control overhead vs. code size).</li> + <li>Support for FORTRAN and Dragonegg.</li> + <li>OpenMP code generation fixes.</li> </ul> </div> @@ -275,7 +280,7 @@ Release Notes</a>.</h1> AUdio STream. Its programming model combines two approaches: functional programming and block diagram composition. In addition with the C, C++, Java, JavaScript output formats, the Faust compiler can generate LLVM bitcode, and - works with LLVM 2.7-3.1.</p> + works with LLVM 2.7-3.2.</p> </div> @@ -433,9 +438,9 @@ Release Notes</a>.</h1> <p>LLVM 3.2 includes several major changes and big features:</p> <ul> - <li>...</li> - <li>New NVPTX back-end (replacing existing PTX back-end) based on NVIDIA - sources</li> + <li>Loop Vectorizer.</li> + <li>New implementation of SROA.</li> + <li>New NVPTX back-end (replacing existing PTX back-end) based on NVIDIA sources.</li> </ul> </div> @@ -454,7 +459,10 @@ Release Notes</a>.</h1> <ul> <li>Thread local variables may have a specified TLS model. See the <a href="LangRef.html#globalvars">Language Reference Manual</a>.</li> - <li>...</li> + <li>'TYPE_CODE_FUNCTION_OLD' type code and autoupgrade code for old function attributes format has been removed.</li> + <li>Internal representation of the Attributes class has been converted into a pointer to an + opaque object that's uniqued by and stored in the LLVMContext object. + The Attributes class then becomes a thin wrapper around this opaque object.</li> </ul> </div> @@ -492,7 +500,7 @@ Release Notes</a>.</h1> <ul> <li>The inner most loops must have a single basic block.</li> <li>The number of iterations are known before the loop starts to execute.</li> - <li>The loop counter needs to be incrimented by one.</li> + <li>The loop counter needs to be incremented by one.</li> <li>The loop trip count <b>can</b> be a variable.</li> <li>Loops do <b>not</b> need to start at zero.</li> <li>The induction variable can be used inside the loop.</li> @@ -527,8 +535,19 @@ Release Notes</a>.</h1> <a href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html">Intro to the LLVM MC Project Blog Post</a>.</p> -<ul> - <li>...</li> +<ul> + <li> Added support for following assembler directives: <code>.ifb</code>, <code>.ifnb</code>, <code>.ifc</code>, + <code>.ifnc</code>, <code>.purgem</code>, <code>.rept</code> and <code>.version</code> (ELF) as well as Darwin specific + <code>.pushsection</code>, <code>.popsection</code> and <code>.previous</code> .</li> + <li>Enhanced handling of <code>.lcomm directive</code>.</li> + <li>MS style inline assembler: added implementation of the offset and TYPE operators.</li> + <li>Targets can specify minimum supported NOP size for NOP padding.</li> + <li>ELF improvements: added support for generating ELF objects on Windows.</li> + <li>MachO improvements: symbol-difference variables are marked as N_ABS, added direct-to-object attribute for data-in-code markers.</li> + <li>Added support for annotated disassembly output for x86 and arm targets.</li> + <li>Arm support has been improved by adding support for ARM TARGET2 relocation + and fixing hadling of ARM-style "$d.*" labels.</li> + <li>Implemented local-exec TLS on PowerPC.</li> </ul> </div> @@ -591,7 +610,7 @@ Release Notes</a>.</h1> <p>New features and major changes in the X86 target include:</p> <ul> - <li>...</li> + <li>Small codegen optimizations, especially for AVX2.</li> </ul> </div> @@ -606,7 +625,7 @@ Release Notes</a>.</h1> <p>New features of the ARM target include:</p> <ul> - <li>...</li> + <li>Support and performance tuning for the A6 'Swift' CPU.</li> </ul> <!--_________________________________________________________________________--> @@ -643,7 +662,29 @@ Release Notes</a>.</h1> <p>New features and major changes in the MIPS target include:</p> <ul> - <li>...</li> + <li>Integrated assembler support: + MIPS32 works for both PIC and static, known limitation is the PR14456 where + R_MIPS_GPREL16 relocation is generated with the wrong addend. + MIPS64 support is incomplete, for example exception handling is not working.</li> + <li>Support for fast calling convention has been added.</li> + <li>Support for Android MIPS toolchain has been added to clang driver.</li> + <li>Added clang driver support for MIPS N32 ABI through "-mabi=n32" option.</li> + <li>MIPS32 and MIPS64 disassembler has been implemented.</li> + <li>Support for compiling programs with large GOTs (exceeding 64kB in size) has been added + through llc option "-mxgot".</li> + <li>Added experimental support for MIPS32 DSP intrinsics.</li> + <li>Experimental support for MIPS16 with following limitations: only soft float is supported, + C++ exceptions are not supported, large stack frames (> 32000 bytes) are not supported, + direct object code emission is not supported only .s .</li> + <li>Standalone assembler (llvm-mc): implementation is in progress and considered experimental.</li> + <li>All classic JIT and MCJIT tests pass on Little and Big Endian MIPS32 platforms.</li> + <li>Inline asm support: all common constraints and operand modifiers have been implemented.</li> + <li>Added tail call optimization support, use llc option "-enable-mips-tail-calls" + or clang options "-mllvm -enable-mips-tail-calls"to enable it.</li> + <li>Improved register allocation by removing registers $fp, $gp, $ra and $at from the list of reserved registers.</li> + <li>Long branch expansion pass has been implemented, which expands branch + instructions with offsets that do not fit in the 16-bit field.</li> + <li>Cavium Octeon II board is used for testing builds (llvm-mips-linux builder).</li> </ul> </div> @@ -655,7 +696,6 @@ Release Notes</a>.</h1> <div> -<ul> <p>Many fixes and changes across LLVM (and Clang) for better compliance with the 64-bit PowerPC ELF Application Binary Interface, interoperability with GCC, and overall 64-bit PowerPC support. Some highlights include:</p> @@ -684,7 +724,6 @@ Release Notes</a>.</h1> <p>There have also been code generation improvements for both 32- and 64-bit code. Instruction scheduling support for the Freescale e500mc and e5500 cores has been added.</p> -</ul> </div> @@ -734,9 +773,11 @@ Release Notes</a>.</h1> from the previous release.</p> <ul> - <li>...</li> -</ul> - +<li>llvm-ld and llvm-stub have been removed, llvm-ld functionality can be partially replaced by + llvm-link | opt | {llc | as, llc -filetype=obj} | ld, or fully replaced by Clang. </li> +<li>MCJIT: added support for inline assembly (requires asm parser), added faux remote target execution to lli option '-remote-mcjit'.</li> +</ul> + </div> <!--=========================================================================--> @@ -770,34 +811,22 @@ to remove a dependency on Target. </p> <div> -<p>In addition, some tools have changed in this release. Some of the changes - are:</p> +<p>In addition, some tools have changed in this release. Some of the changes are:</p> <ul> - <li>...</li> +<li>opt: added support for '-mtriple' option.</li> +<li>llvm-mc : - added '-disassemble' support for '-show-inst' and '-show-encoding' options, added '-edis' option to produce annotated + disassembly output for X86 and ARM targets.</li> +<li>libprofile: allows the profile data file name to be specified by the LLVMPROF_OUTPUT environment variable.</li> +<li>llvm-objdump: has been changed to display available targets, '-arch' option accepts x86 and x86-64 as valid arch names.</li> +<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', + option '-fp-contract' controls the creation by optimizations of fused FP by selecting Fast, Standard, or Strict mode.</li> +<li>llc: object file output from llc is no longer considered experimental.</li> </ul> </div> -<!--=========================================================================--> -<h3> -<a name="python">Python Bindings</a> -</h3> - -<div> - -<p>Officially supported Python bindings have been added! Feature support is far - from complete. The current bindings support interfaces to:</p> - -<ul> - <li>...</li> -</ul> - -</div> - -</div> - <!-- *********************************************************************** --> <h2> <a name="knownproblems">Known Problems</a> @@ -818,7 +847,7 @@ to remove a dependency on Target. </p> <p>Known problem areas include:</p> <ul> - <li>The CellSPU, MSP430, and XCore backends are experimental.</li> + <li>The CellSPU, MSP430, and XCore backends are experimental, and the CellSPU backend will be removed in LLVM 3.3.</li> <li>The integrated assembler, disassembler, and JIT is not supported by several targets. If an integrated assembler is not supported, then a |