forked from OSchip/llvm-project
Using llc always rather than sometimes using LLC.
Try to improve language in various places. Use X86 always rather than sometimes using x86. Add some minor Ada info. llvm-svn: 52095
This commit is contained in:
Duncan Sands
parent
0bc1526b6d
commit
5644846da3
|
|
@ -96,7 +96,7 @@ test suite no longer depends on llvm-upgrade, which makes it run faster.</p>
|
|||
IRBuilder.</li>
|
||||
<li>MRegisterInfo was renamed to TargetRegisterInfo.</li>
|
||||
<li>The MappedFile class is gone, please use MemoryBuffer instead.</li>
|
||||
<li>The '-enable-eh' flag to LLC has been removed. Now code should encode
|
||||
<li>The '-enable-eh' flag to llc has been removed. Now code should encode
|
||||
whether it is safe to not generate unwind information for a function by
|
||||
tagging the Function object with the 'nounwind' attribute.</li>
|
||||
|
||||
|
|
@ -113,12 +113,12 @@ test suite no longer depends on llvm-upgrade, which makes it run faster.</p>
|
|||
<p>LLVM 2.3 includes several major new capabilities:</p>
|
||||
|
||||
<ul>
|
||||
<li>Multiple Return Value Support</li>
|
||||
<li>Multiple Return Value Support.</li>
|
||||
|
||||
|
||||
<li><p>LLVM 2.3 includes a complete reimplementation of the "llvmc" tool. It is
|
||||
designed to overcome several problems of the original llvmc and to provide a
|
||||
superset of the features as the 'gcc' driver.</p>
|
||||
designed to overcome several problems with the original llvmc and to provide a
|
||||
superset of the features of the 'gcc' driver.</p>
|
||||
|
||||
<p>The main features of llvmc2 is:</p>
|
||||
|
||||
|
|
@ -140,7 +140,7 @@ no runtime interpretation is needed.</li>
|
|||
C.</li>
|
||||
|
||||
|
||||
<li>kaleidoscope tutorial in ocaml.</li>
|
||||
<li>Kaleidoscope tutorial in Ocaml.</li>
|
||||
|
||||
</ul>
|
||||
|
||||
|
|
@ -154,7 +154,7 @@ no runtime interpretation is needed.</li>
|
|||
|
||||
<div class="doc_text">
|
||||
|
||||
<p>LLVM 2.3 fully supports llvm-gcc 4.2 front-end.</p>
|
||||
<p>LLVM 2.3 fully supports the llvm-gcc 4.2 front-end.</p>
|
||||
|
||||
<p>llvm-gcc 4.2 includes numerous fixes to better support the Objective-C
|
||||
front-end. Objective-C now works very well on Mac OS/X.</p>
|
||||
|
|
@ -225,10 +225,10 @@ for (i = LB; i < NUB; ++i)
|
|||
</pre>
|
||||
</li>
|
||||
|
||||
<li>LLVM includes a new <tt>memcpy</tt> optimization pass which optimizes out
|
||||
dead <tt>memcpy</tt> calls, unneeded copies of aggregates, and handles the
|
||||
<li>LLVM includes a new <tt>memcpy</tt> optimization pass removes
|
||||
dead <tt>memcpy</tt> calls, unneeded copies of aggregates, and performs
|
||||
return slot optimization. The LLVM optimizer now notices long sequences of
|
||||
consecutive stores and merges them into <tt>memcpy</tt>s where profitable.</li>
|
||||
consecutive stores and merges them into <tt>memcpy</tt>'s where profitable.</li>
|
||||
|
||||
<li>Alignment detection for vector memory references and for <tt>memcpy</tt> and
|
||||
<tt>memset</tt> is now more aggressive.</li>
|
||||
|
|
@ -245,13 +245,12 @@ deletion pass, which <em>is</em> safe for infinite loops.</li>
|
|||
functions for C-based languages, has been rewritten to be a FunctionPass
|
||||
instead a ModulePass. This allows it to be run more often and to be
|
||||
included at -O1 in llvm-gcc. It was also extended to include more
|
||||
optimizations and several corner case bugs are fixed.</li>
|
||||
optimizations and several corner case bugs were fixed.</li>
|
||||
|
||||
<li>LLVM now includes a simple 'Jump Threading' pass, which attempts to simplify
|
||||
the conditional branches with information about predecessor blocks. This
|
||||
simplifies the control flow graph. This pass is pretty basic at this point,
|
||||
but catches some important cases and provides a foundation to build off
|
||||
of.</li>
|
||||
conditional branches using information about predecessor blocks, simplifying
|
||||
the control flow graph. This pass is pretty basic at this point, but catches
|
||||
some important cases and provides a foundation to build on.</li>
|
||||
</ul>
|
||||
|
||||
</div>
|
||||
|
|
@ -328,12 +327,12 @@ faster:</p>
|
|||
registers.</li>
|
||||
|
||||
<li>Trampolines (taking the address of a nested function) now work on
|
||||
Linux/x86-64.</li>
|
||||
Linux/X86-64.</li>
|
||||
|
||||
<li><tt>__builtin_prefetch</tt> is now compiled into the appropriate prefetch
|
||||
instructions instead of being ignored.</li>
|
||||
|
||||
<li>128-bit integers are now supported on x86-64 targets.</li>
|
||||
<li>128-bit integers are now supported on X86-64 targets.</li>
|
||||
|
||||
<li>The register allocator can now rematerialize PIC-base computations.</li>
|
||||
|
||||
|
|
@ -439,7 +438,7 @@ href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev list</a>.</p>
|
|||
|
||||
<ul>
|
||||
<li>The MSIL, IA64, Alpha, SPU, and MIPS backends are experimental.</li>
|
||||
<li>The LLC "<tt>-filetype=asm</tt>" (the default) is the only supported
|
||||
<li>The llc "<tt>-filetype=asm</tt>" (the default) is the only supported
|
||||
value for this option.</li>
|
||||
</ul>
|
||||
|
||||
|
|
@ -573,7 +572,7 @@ programs.</li>
|
|||
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 LLC or native compilers.</li>
|
||||
C++ code compiled with llc or native compilers.</li>
|
||||
<li>The C backend does not support all exception handling constructs.</li>
|
||||
</ul>
|
||||
|
||||
|
|
@ -597,8 +596,8 @@ llvmdev mailing list if you are interested.</p>
|
|||
<p>The only major language feature of GCC not supported by llvm-gcc is
|
||||
the <tt>__builtin_apply</tt> family of builtins. However, some extensions
|
||||
are only supported on some targets. For example, trampolines are only
|
||||
supported on some targets, which are used when you take the address of a
|
||||
nested function.</p>
|
||||
supported on some targets (these are used when you take the address of a
|
||||
nested function).</p>
|
||||
|
||||
<p>If you run into GCC extensions which are not supported, please let us know.
|
||||
</p>
|
||||
|
|
@ -618,8 +617,8 @@ itself, Qt, Mozilla, etc.</p>
|
|||
|
||||
<ul>
|
||||
<li>Exception handling works well on the X86 and PowerPC targets, including
|
||||
x86-64 darwin. This works when linking to a libstdc++ compiled by GCC. It is
|
||||
supported on x86-64 linux, but that is disabled by default in this release.</li>
|
||||
X86-64 darwin. This works when linking to a libstdc++ compiled by GCC. It is
|
||||
supported on X86-64 linux, but that is disabled by default in this release.</li>
|
||||
</ul>
|
||||
|
||||
</div>
|
||||
|
|
@ -634,15 +633,17 @@ supported on x86-64 linux, but that is disabled by default in this release.</li>
|
|||
The llvm-gcc 4.2 Ada compiler works fairly well, however this is not a mature
|
||||
technology and problems should be expected.
|
||||
<ul>
|
||||
<li>The Ada front-end currently only builds on x86-32. This is mainly due
|
||||
<li>The Ada front-end currently only builds on X86-32. This is mainly due
|
||||
to lack of trampoline support (pointers to nested functions) on other platforms,
|
||||
however it <a href="http://llvm.org/PR2006">also fails to build on x86-64</a>
|
||||
however it <a href="http://llvm.org/PR2006">also fails to build on X86-64</a>
|
||||
which does support trampolines.</li>
|
||||
<li>The Ada front-end <a href="http://llvm.org/PR2007">fails to bootstrap</a>.
|
||||
Workaround: configure with --disable-bootstrap.</li>
|
||||
<li>The c380004 and <a href="http://llvm.org/PR2010">c393010</a> ACATS tests
|
||||
fail (c380004 also fails with gcc-4.2 mainline).</li>
|
||||
<li>Many gcc specific Ada tests continue to crash the compiler.</li>
|
||||
fail (c380004 also fails with gcc-4.2 mainline). When built at -O3, the
|
||||
<a href="http://llvm.org/PR2421">cxg2021</a> ACATS test also fails.</li>
|
||||
<li>Some gcc specific Ada tests continue to crash the compiler. The testsuite
|
||||
reports most tests as having failed even though they pass.</li>
|
||||
<li>The -E binder option (exception backtraces)
|
||||
<a href="http://llvm.org/PR1982">does not work</a> and will result in programs
|
||||
crashing if an exception is raised. Workaround: do not use -E.</li>
|
||||
|
|
|
|||
Loading…
Reference in New Issue