[llvm-commits] [llvm] r145193 - /llvm/trunk/docs/ReleaseNotes.html
Chris Lattner
sabre at nondot.org
Sun Nov 27 11:38:20 PST 2011
Author: lattner
Date: Sun Nov 27 13:38:20 2011
New Revision: 145193
URL: http://llvm.org/viewvc/llvm-project?rev=145193&view=rev
Log:
rewrite the known problems section. Including a short list of individual bugs per target isn't particularly useful. Link to the target features matrix.
Modified:
llvm/trunk/docs/ReleaseNotes.html
Modified: llvm/trunk/docs/ReleaseNotes.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/ReleaseNotes.html?rev=145193&r1=145192&r2=145193&view=diff
==============================================================================
--- llvm/trunk/docs/ReleaseNotes.html (original)
+++ llvm/trunk/docs/ReleaseNotes.html Sun Nov 27 13:38:20 2011
@@ -1330,144 +1330,30 @@
<div>
-<p>This section contains significant known problems with the LLVM system, listed
- by component. If you run into a problem, please check
- the <a href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
- there isn't already one.</p>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="experimental">Experimental features included with this release</a>
-</h3>
-
-<div>
-
-<p>The following components of this LLVM release are either untested, known to
- be broken or unreliable, or are in early development. These components
- should not be relied on, and bugs should not be filed against them, but they
- may be useful to some people. In particular, if you would like to work on
- one of these components, please contact us on
- the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev
- list</a>.</p>
-
-<ul>
- <li>The Alpha, Blackfin, CellSPU, MicroBlaze, MSP430, MIPS, PTX, SystemZ and
- XCore backends are experimental.</li>
-
- <li><tt>llc</tt> "<tt>-filetype=obj</tt>" is experimental on all targets other
- than darwin and ELF X86 systems.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="x86-be">Known problems with the X86 back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>The X86-64 backend <a href="http://llvm.org/PR1740">does not yet support
- the <tt>va_arg</tt> LLVM IR instruction</a>. Currently, front-ends support
- variadic argument constructs on X86-64 by lowering them manually.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="ppc-be">Known problems with the PowerPC back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>The PPC32/ELF support lacks PIC support.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="arm-be">Known problems with the ARM back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>Thumb mode works only on ARMv6 or higher processors. On sub-ARMv6
- processors, thumb programs can crash or produce wrong results
- (<a href="http://llvm.org/PR1388">PR1388</a>).</li>
-
- <li>Compilation for ARM Linux OABI (old ABI) is supported but not fully
- tested.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="sparc-be">Known problems with the SPARC back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does not
- support the 64-bit SPARC ABI (-m64).</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="mips-be">Known problems with the MIPS back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>64-bit MIPS targets are not supported yet.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="alpha-be">Known problems with the Alpha back-end</a>
-</h3>
-
-<div>
-
-<ul>
- <li>On 21164s, some rare FP arithmetic sequences which may trap do not have
- the appropriate nops inserted to ensure restartability.</li>
-</ul>
-
-</div>
-
-<!-- ======================================================================= -->
-<h3>
- <a name="c-be">Known problems with the C back-end</a>
-</h3>
-
-<div>
-
-<p>The C backend has numerous problems and is not being actively maintained.
- Depending on it for anything serious is not advised.</p>
-
-<ul>
- <li><a href="http://llvm.org/PR802">The C backend has only basic support for
- inline assembly code</a>.</li>
-
- <li><a href="http://llvm.org/PR1658">The C backend violates the ABI of common
- C++ programs</a>, preventing intermixing between C++ compiled by the CBE
- and C++ code compiled with <tt>llc</tt> or native compilers.</li>
-
- <li>The C backend does not support all exception handling constructs.</li>
-
- <li>The C backend does not support arbitrary precision integers.</li>
+<p>LLVM is generally a production quality compiler, and is used by a broad range
+ of applications and shipping in many products. That said, not every
+ subsystem is as mature as the aggregate, particularly the more obscure
+ targets. If you run into a problem, please check the <a
+ href="http://llvm.org/bugs/">LLVM bug database</a> and submit a bug if
+ there isn't already one or ask on the <a
+ href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev
+ list</a>.</p>
+
+ <p>Known problem areas include:</p>
+
+<ul>
+ <li>The Alpha, Blackfin, CellSPU, MSP430, PTX, SystemZ and
+ XCore backends are experimental, and several of these have already been
+ removed from mainline.</li>
+
+ <li>The integrated assembler, disassembler, and JIT is not supported by
+ several targets. If an integrated assembler is not supported, then a
+ system assembler is required. For more details, see the <a
+ href="CodeGenerator.html#targetfeatures">Target Features Matrix</a>.
+ </li>
+
+ <li>The C backend has numerous problems and is not being actively maintained.
+ Depending on it for anything serious is not advised.</li>
</ul>
</div>
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