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Grammatical and punctuation corrections.
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llvm/docs/ReleaseNotes.html

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<p>This document contains the release notes for the LLVM compiler
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infrastructure, release 1.1. Here we describe the status of LLVM, including any
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known problems, and bug fixes from the previous release. The most up-to-date
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known problems and bug fixes from the previous release. The most up-to-date
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version of this document can be found on the <a
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href="http://llvm.cs.uiuc.edu/releases/1.1/">LLVM 1.1 web site</a>. If you are
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not reading this on the LLVM web pages, you should probably go there, because
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not reading this on the LLVM web pages, you should probably go there because
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this document may be updated after the release.</p>
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<p>For more information about LLVM, including information about potentially more
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<p>This is the second public release of the LLVM compiler infrastructure. This
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release is primarily a bugfix release, dramatically improving the C/C++
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front-end, and improving support for C++ in the LLVM core. This release also
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front-end and improving support for C++ in the LLVM core. This release also
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includes a few new features, such as a simple profiler, support for Mac OS X,
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better interoperability with external source bases, a new example language
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front-end, and improvements in a few optimizations. The performance of several
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</p>
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<p>
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The LLVM native code generators are very stable, but do not currently support
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The LLVM native code generators are very stable but do not currently support
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unwinding (exception throwing or <tt>longjmp</tt>ing), which prevent them from
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working with programs like the <tt>253.perlbmk</tt> in SPEC CPU2000. The C
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backend and the rest of LLVM does support these programs however, so you can
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backend and the rest of LLVM supports these programs, so you can
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still use LLVM with them. Support for unwinding will be added in a future
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release.
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</p>
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<ol>
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<li><a
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href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000528.html">A new
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LLVM profiler, similar to gprof</a> is available</li>
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LLVM profiler, similar to gprof,</a> is available.</li>
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<li>LLVM and the C/C++ front-end now compile on Mac OS X! Mac OS X users can
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now explore the LLVM optimizer with the C backend and interpreter. Note that
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LLVM requires GCC 3.3 on Mac OS X.</li>
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<li>LLVM has been <a
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href="http://mail.cs.uiuc.edu/pipermail/llvmdev/2003-November/000554.html">moved
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into an 'llvm' C++ namespace</a>, for easier integration with third-party
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into an 'llvm' C++ namespace</a> for easier integration with third-party
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code. Note that due to lack of namespace support in GDB 5.x, you will probably
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want to upgrade to GDB 6 or better to debug LLVM code.</li>
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<ol>
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<li>
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New directories can be added to the source tree, and the build will
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automatically pick them up (i.e. no need to re-run <tt>configure</tt>).
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automatically pick them up (i.e. no need to edit <tt>configure.ac</tt> and
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re-run <tt>configure</tt>).
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</li>
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<li>
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<li>A front-end for "Stacker" (a simple Forth-like language) is now
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<a href="http://llvm.cs.uiuc.edu/PR136">included in the main LLVM tree</a>.
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Additionally, Reid Spencer, the author, contributed a document <a href="Stacker.html">describing his experiences writing Stacker, and the language itself</a>. This document is invaluable for others writing front-ends targetting LLVM.</li>
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Additionally, Reid Spencer, the author, contributed a document
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<a href="Stacker.html">describing his experiences writing Stacker and the language itself</a>.
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This document is invaluable for others writing front-ends targetting LLVM.</li>
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<li>The <tt>configure</tt> script will now configure all projects placed in the
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<tt>llvm/projects</tt> directory.</li>
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<li>The <tt>-licm</tt> pass can now sink instructions out the bottom of loops
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in addition to being able to hoist them out the top.</li>
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<li>The <tt>-basicaa</tt> pass (the default alias analysis) has been upgraded
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to be <a href="http://llvm.cs.uiuc.edu/PR86">significantly more
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<li>The <tt>-basicaa</tt> pass (the default alias analysis pass) has been
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upgraded to be <a href="http://llvm.cs.uiuc.edu/PR86">significantly more
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precise</a>.</li>
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<li>LLVM 1.1 implements a simple size optimization for LLVM bytecode files.
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This means that the 1.1 files are smaller than 1.0, but that 1.0 won't
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This means that the 1.1 files are smaller than 1.0, but LLVM 1.0 won't
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read 1.1 bytecode files.</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR140">The gccld program produces a runner script that includes command-line options to load the necessary shared objects.</a></li>
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more, giving the optimizer more freedom.</a></li>
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<li>The C front-end now <a href="http://llvm.cs.uiuc.edu/PR84">generates
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type-safe code</a> in several cases that it did not before, which prevented
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some important optimizations.</li>
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type-safe code</a> in several cases that it did not before, allowing
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optimization of code that could not be optimized previously.</li>
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<li>The LLVM build system has been taught to catch some common configuration
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problems that <a href="http://llvm.cs.uiuc.edu/PR96">caused it to get
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horribly confused</a> before.</li>
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horribly confused</a>.</li>
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<li>The LLVM header files are now
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<a href="http://llvm.cs.uiuc.edu/PR114">-Wold-style-cast clean</a>.</li>
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<a href="http://llvm.cs.uiuc.edu/PR11">generated N^2 amounts of duplicated cleanup code</a> in some cases.</li>
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<li>The JIT used to <a href="http://llvm.cs.uiuc.edu/PR177">generate code for
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all functions pointed to by globals</a> immediately, before the program
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started execution, but now it waits until the first time they are called to
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all functions pointed to by globals</a> before the program
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started execution. Now, it waits until the first time the functions are
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called to
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compile them. This dramatically speeds up short runs of large C++ programs,
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which often have large numbers of functions pointed to by vtables.</li>
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</ol>
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<li><a href="http://llvm.cs.uiuc.edu/PR71">llvm-as crashes when labels are used in phi nodes</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR72">[build problem] Callgraph.cpp not pulled in from libipa.a</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR77">Variables in scope of output setjmp
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calls should be volatile</a> (Note that this does not effect correctness on
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calls should be volatile</a> (Note that this does not affect correctness on
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many platforms, such as X86).</li>
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<li><a href="http://llvm.cs.uiuc.edu/PR83">[X86] Emission of global bool initializers broken</a></li>
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<li><a href="http://llvm.cs.uiuc.edu/PR91">[gccld] The -r (relinking) option does not work correctly</a></li>
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interpreter (no native backend for the PowerPC is available yet).
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The core LLVM infrastructure uses "autoconf" for portability, so hopefully we
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work on more platforms than that. However, it is likely that we
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missed something, and that minor porting is required to get LLVM to work on
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missed something and that minor porting is required to get LLVM to work on
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new platforms. We welcome portability patches and error messages.</p>
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</div>
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<p>This section contains all known problems with the LLVM system, listed by
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component. As new problems are discovered, they will be added to these
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sections. If you run into a problem, please check the <a
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href="http://llvm.cs.uiuc.edu/bugs/">LLVM bug database</a>, and submit a bug if
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href="http://llvm.cs.uiuc.edu/bugs/">LLVM bug database</a> and submit a bug if
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there isn't already one.</p>
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</div>
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the following extensions are known to <b>not be</b> supported:
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<ol>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Local-Labels.html#Local%20Labels">Local Labels</a>: Labels local to a block.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#Labels%20as%20Values">Labels as Values</a>: Getting pointers to labels, and computed gotos.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#Labels%20as%20Values">Labels as Values</a>: Getting pointers to labels and computed gotos.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html#Nested%20Functions">Nested Functions</a>: As in Algol and Pascal, lexical scoping of functions.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constructing-Calls.html#Constructing%20Calls">Constructing Calls</a>: Dispatching a call to another function.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#Extended%20Asm">Extended Asm</a>: Assembler instructions with C expressions as operands.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints">Constraints</a>: Constraints for asm operands</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Constraints.html#Constraints">Constraints</a>: Constraints for asm operands.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Asm-Labels.html#Asm%20Labels">Asm Labels</a>: Specifying the assembler name to use for a C symbol.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Explicit-Reg-Vars.html#Explicit%20Reg%20Vars">Explicit Reg Vars</a>: Defining variables residing in specified registers.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html#Return%20Address">Return Address</a>: Getting the return or frame address of a function.</li>
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<p>The following GCC extensions are <b>partially</b> supported. An ignored
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attribute means that the LLVM compiler ignores the presence of the attribute,
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but the code should still work. An unsupported attribute is one which is
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ignored by the LLVM compiler, which will cause a different interpretation of
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ignored by the LLVM compiler and will cause a different interpretation of
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the program.</p>
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<ol>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#Function%20Attributes">Function Attributes</a>:
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Declaring that functions have no side effects, or that they can never
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Declaring that functions have no side effects or that they can never
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return.<br>
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<b>Supported:</b> <tt>format</tt>, <tt>format_arg</tt>, <tt>non_null</tt>,
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Subscripting.html#Subscripting">Subscripting</a>: Any array can be subscripted, even if not an lvalue.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html#Pointer%20Arith">Pointer Arith</a>: Arithmetic on <code>void</code>-pointers and function pointers.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Initializers.html#Initializers">Initializers</a>: Non-constant initializers.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html#Compound%20Literals">Compound Literals</a>: Compound literals give structures, unions or arrays as values.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html#Compound%20Literals">Compound Literals</a>: Compound literals give structures, unions,
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or arrays as values.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html#Designated%20Inits">Designated Inits</a>: Labeling elements of initializers.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Cast-to-Union.html#Cast%20to%20Union">Cast to Union</a>: Casting to union type from any member of the union.</li>
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<li><a href="http://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html#Case%20Ranges">Case Ranges</a>: `case 1 ... 9' and such.</li>
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<div class="doc_text">
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<p>For this release, the C++ front-end is considered to be fully functional, but
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<p>For this release, the C++ front-end is considered to be fully functional but
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has not been tested as thoroughly as the C front-end. It has been tested and
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works for a number of non-trivial programs, but there may be lurking bugs.
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Please report any bugs or problems.</p>
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<ul>
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<li>The C++ front-end inherits all problems afflicting the <a href="#c-fe">C
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front-end</a></li>
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front-end</a>.</li>
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</ul>
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</div>
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<li>Destructors for local objects are not always run when a <tt>longjmp</tt> is
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performed. In particular, destructors for objects in the <tt>longjmp</tt>ing
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function and in the <tt>setjmp</tt> receiver function may not be run.
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Objects in intervening stack frames will be destroyed however (which is
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Objects in intervening stack frames will be destroyed, however (which is
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better than most compilers).</li>
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<li>The LLVM C++ front-end follows the <a
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<div class="doc_text">
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<p>A wide variety of additional information is available on the LLVM web page,
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including mailing lists publications describing algorithms and components
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including mailing lists and publications describing algorithms and components
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implemented in LLVM. The web page also contains versions of the API
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documentation which is up-to-date with the CVS version of the source code. You
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can access versions of these documents specific to this release by going into

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