forked from OSchip/llvm-project
add a bunch of random notes and fix some issues noticed by Gabor.
This is not ready for review or hacking, this is a work in progress :) llvm-svn: 46816
This commit is contained in:
Chris Lattner
parent
afa5f492e5
commit
cdc44ed525
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@ -79,14 +79,38 @@ llvm-gcc 4.2 in this release cycle because <b>LLVM 2.2 is the last release
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that will support llvm-gcc 4.0</b>: LLVM 2.3 will only support the llvm-gcc
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4.2 front-end.</p>
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<p>The <a href="http://clang.llvm.org/">clang project</a> is an effort
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to build a set of new front-end technology for the LLVM optimizer and code
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generator. Currently, its C and Objective-C support is maturing nicely, and it
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has advanced source-to-source analysis and transformation capabilities. If you
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are interested in building source-level tools for C and Objective-C (and
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eventually C++), you should take a look. However, note that clang is not an
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official part of the LLVM 2.2 release. If you are interested in this project,
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please see the web site and check it out from SVN head.</p>
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<p>The <a href="http://clang.llvm.org/">clang project</a> is an effort to build
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a set of new 'llvm native' front-end technologies for the LLVM optimizer
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and code generator. Currently, its C and Objective-C support is maturing
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nicely, and it has advanced source-to-source analysis and transformation
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capabilities. If you are interested in building source-level tools for C and
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Objective-C (and eventually C++), you should take a look. However, note that
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clang is not an official part of the LLVM 2.2 release. If you are interested in
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this project, please see the web site.</p>
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</div>
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<!--=========================================================================-->
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<div class="doc_subsection">
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<a name="majorfeatures">Major New Features</a>
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</div>
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<div class="doc_text">
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<p>Dale contributed full support for long double on x86/x86-64 (where it is 80
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bits) and on Darwin PPC/PPC64 (where it is 128 bits).</p>
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<p>Ada, gfortran</p>
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<p>
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debug improvements -O0
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EH.
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Gordon: GC Revamp. docs/GarbageCollection.html
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Kaleidescope: docs/tutorial
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Gordon: C and Ocaml Bindings
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</div>
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@ -102,8 +126,12 @@ optimizer, speeding it up and making it more aggressive. For example:</p>
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<ul>
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<li>.</li>
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<li>Daniel Berlin and (?) rewrote Andersen's alias analysis (which is not
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enabled by default) to be several orders of magnitude faster, implmented Offline
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Variable Substitution.</li>
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Devang: LoopIndexSplit is enabled by default.
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</ul>
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</div>
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@ -115,13 +143,17 @@ optimizer, speeding it up and making it more aggressive. For example:</p>
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<div class="doc_text">
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<p>One of the main focuses of this release was performance tuning and bug
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<p>foci of this release was performance tuning and bug
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fixing. In addition to these, several new major changes occurred:</p>
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<ul>
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<li>.</li>
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<li>Owen contributed Machine Loop info, domintors, etc.</li>
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<li>Dan added support for emitting debug information with .file and .loc on
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targets that support it</li>
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<li>Evan physical register dependencies in the BURR scheduler</li>
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</ul>
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</div>
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@ -137,7 +169,8 @@ optimizer, speeding it up and making it more aggressive. For example:</p>
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</p>
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<ul>
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<li>.</li>
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<li>Evan X86 now models EFLAGS in instructions.</li>
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<li>Evan: If conversion on by default for ARM.</li>
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</ul>
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</div>
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@ -204,7 +237,7 @@ optimizer, speeding it up and making it more aggressive. For example:</p>
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(and probably other unix-like systems).</li>
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<li>PowerPC and X86-based Mac OS X systems, running 10.3 and above in 32-bit and
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64-bit modes.</li>
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<li>Intel and AMD machines running on Win32 using MinGW libraries (native)</li>
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<li>Intel and AMD machines running on Win32 using MinGW libraries (native).</li>
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<li>Intel and AMD machines running on Win32 with the Cygwin libraries (limited
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support is available for native builds with Visual C++).</li>
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<li>Sun UltraSPARC workstations running Solaris 8.</li>
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@ -250,8 +283,8 @@ useful to some people. In particular, if you would like to work on one of these
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components, please contact us on the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
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<ul>
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<li>The <tt>-cee</tt> pass is known to be buggy, and may be removed in a
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future release.</li>
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<li>The <tt>-cee</tt> pass is known to be buggy and will be removed in
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LLVM 2.3.</li>
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<li>The MSIL, IA64, Alpha, and MIPS backends are experimental.</li>
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<li>The LLC "<tt>-filetype=asm</tt>" (the default) is the only supported
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value for this option.</li>
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@ -400,8 +433,8 @@ programs.</li>
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<div class="doc_text">
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<p>llvm-gcc4 does not currently support <a href="http://llvm.org/PR869">Link-Time
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Optimization</a> on most platforms "out-of-the-box". Please inquire on the
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<p>llvm-gcc does not currently support <a href="http://llvm.org/PR869">Link-Time
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Optimization</a> on most platforms "out-of-the-box". Please inquire on the
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llvmdev mailing list if you are interested.</p>
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</div>
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