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Code Issues Projects Releases Wiki Activity

final set of major updates

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46923 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-02-10 08:17:19 +00:00
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@ -138,10 +138,15 @@ href="http://llvm.org/PR1971">not support EQUIVALENCE yet</a>.</li>
bits) and on Darwin PPC/PPC64 (where it is 128 bits). In previous LLVM
releases, llvm-gcc silently mapped long double to double.</li>
<li>Gordon rewrote most of the <a href="GarbageCollection.html">Accurate Garbage
Collection</a> code in the code generator, making the generated code more
efficient and adding support for the Ocaml garbage collector metadata
format.</li>
<li>Gordon Henriksen rewrote most of the <a href="GarbageCollection.html"
>Accurate Garbage Collection</a> code in the code generator, making the
generated code more efficient and adding support for the Ocaml garbage collector
metadata format.</li>
<li>Christopher Lamb contributed support for multiple address spaces in LLVM
IR. This is useful for supporting targets that have 'near' vs 'far' pointers,
'RAM' vs 'ROM' pointers, or that have non-local memory that can be accessed with
special instructions.</li>
<li>LLVM now includes a new set of detailed <a
href="tutorial/index.html">tutorials</a>, which explain how to implement a
@ -149,6 +154,44 @@ language with LLVM and shows how to use several important APIs.</li>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
<a name="coreimprovements">LLVM Core Improvements</a>
</div>
<div class="doc_text">
<p>New features include:
</p>
<ul>
<li>Gordon contributed support for C and Ocaml Bindings for the basic LLVM IR
construction routines as well as several other auxiliary APIs.</li>
<li>Anton added readnone/readonly attributes for modeling function side effects.
Duncan hooked up GCC's pure/const attributes to use them and enhanced mod/ref
analysis to use them.</li>
<li>Devang added LLVMFoldingBuilder, a version of LLVMBuilder that implicitly
simplifies the code as it is constructed.</li>
<li>Ted Kremenek added a framework for generic object serialization to bitcode
files. This support is only used by clang right now for ASTs but is extensible
and could be used for serializing arbitrary other data into bitcode files.</li>
<li>Duncan improved TargetData to distinguish between the size/alignment of a
type in a register, in memory according to the platform ABI, and in memory when
we have a choice.</li>
<li>Duncan moved parameter attributes off of FunctionType and onto functions
and calls. This makes it much easier to add attributes to a function in a
transformation pass.</li>
<li>Dan Gohman added support for vector sin, cos, and pow intrinsics.</li>
</ul>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
<a name="codegen">Code Generator Improvements</a>
@ -211,15 +254,15 @@ more consistent, and better documented.</li>
<div class="doc_text">
<p>In addition to a huge array of bug fixes and minor performance tweaks, LLVM
2.2 supports a few major enhancements:</p>
<p>In addition to a huge array of bug fixes and minor performance tweaks, the
LLVM 2.2 optimizers support a few major enhancements:</p>
<ul>
<li>Daniel Berlin and Curtis Dunham rewrote Andersen's alias analysis to be
several orders of magnitude faster, implemented Offline Variable Substitution
and Lazy Cycle Detection. Note that Andersen's is not enabled in llvm-gcc by
default.</li>
several orders of magnitude faster, and implemented Offline Variable
Substitution and Lazy Cycle Detection. Note that Andersen's is not enabled in
llvm-gcc by default, but can be accessed through 'opt'.</li>
<li>Dan Gohman contributed several enhancements to Loop Strength Reduction (LSR)
to make it more aggressive with SSE intrinsics.</li>
@ -240,48 +283,23 @@ variables have different widths.</li>
</div>
<div class="doc_text">
<p>New features include:
<p>New target-specific features include:
</p>
<ul>
<li>Evan X86 now models EFLAGS in instructions.</li>
<li>Evan: If conversion on by default for ARM.</li>
<li>Bruno: MIPS PIC support.</li>
<li>Arnold Schwaighofer: X86 tail call support.</li>
<li>Dale darwin/x86-64 and darwin/ppc eh</li>
<li>Evan: darwin/x86 debug info, improvements at -O0?</li>
</ul>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
<a name="coreimprovements">LLVM Core Improvements</a>
</div>
<div class="doc_text">
<p>New features include:
</p>
<ul>
<li>Devang added LLVMFoldingBuilder.</li>
<li>Dan added support for vector sin, cos, and pow intrinsics.</li>
<li>Ted added a framework for generic object serialization to bitcode files,
only used by clang right now for ASTs but could be used for other
stuff.</li>
<li>Duncan fixed TargetData to distinguish between the size/alignment of a type
in a register, in memory according to the platform ABI, and in memory when
we have a choice.</li>
<li>Duncan moved parameter attributes off of function type and onto functions
and calls, which makes it much easier to add attributes to a function in a
transformation.</li>
<li>Christopher Lamb: Multiple address spaces.</li>
<li>Gordon: C and Ocaml Bindings</li>
<li>Anton added readnone/readonly attributes for modeling function side effects
and Duncan hooked up GCC's pure/const attributes to use them and enhanced alias
analysis to use them.</li>
<li>Evan contributed support to the X86 backend to model the mod/ref behavior
of the EFLAGS register explicitly in all instructions. This gives more freedom
to the scheduler, and is a more explicit way to model the instructions.</li>
<li>Dale contributed support for exception handling on Darwin/x86-64 and
Darwin/ppc.</li>
<li>Evan turned on if-conversion by default for ARM, allowing LLVM to take
advantage of its predication features.</li>
<li>Bruno added PIC support to the MIPS backend, fixed many bugs and improved
support for architecture variants.</li>
<li>Arnold Schwaighofer added support for X86 tail calls (limitations?
details?).</li>
<li>Evan contributed several enhancements to Darwin/x86 debug information,
and improvements at -O0 (details?).</li>
</ul>
</div>
@ -296,9 +314,18 @@ analysis to use them.</li>
</p>
<ul>
<li>Gordon Henriksen updated docs/Passes.html</li>
<li>New lexer and parser for tblgen, new lexer for asmparser</li>
<li>Dale GCC testsuite</li>
<li>Gordon expanded and updated the <a href="Passes.html">LLVM Analysis and
Transformation Passes</a> reference to include descriptions for each pass.</li>
<li>We rewrote the lexer and parser used by TableGen to make them simpler
and cleaner. This gives tblgen support for 'caret diagnostics'. The .ll file
lexer was also rewritten to support caret diagnostics but doesn't use this
support yet.</li>
<li>Dale has been grinding through the GCC testsuite, and marked many
LLVM-incompatible tests as not-to-be-run (for example, if they are grepping
through some GCC dump file that LLVM doesn't produce), he also found and fixed
many LLVM bugs exposed by the testsuite.</li>
</ul>
</div>
@ -387,6 +414,8 @@ components, please contact us on the <a href="http://lists.cs.uiuc.edu/mailman/l
<li>The X86 backend occasionally has <a href="http://llvm.org/PR1649">alignment
problems</a> on operating systems that don't require 16-byte stack alignment
(including most non-darwin OS's like linux).</li>
<li>The X86 backend generates inefficient floating point code when configured to
generate code for systems that don't have SSE2.</li>
</ul>
</div>
@ -418,7 +447,7 @@ 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>
<li>There is a bug in QEMU-ARM (<= 0.9.0) which causes it to incorrectly execute
<li>There is a bug in QEMU-ARM (&lt;= 0.9.0) which causes it to incorrectly execute
programs compiled with LLVM. Please use more recent versions of QEMU.</li>
</ul>
@ -550,11 +579,11 @@ llvmdev mailing list if you are interested.</p>
<tt>const</tt>, <tt>constructor</tt>, <tt>destructor</tt>,
<tt>deprecated</tt>, <tt>fastcall</tt>, <tt>format</tt>,
<tt>format_arg</tt>, <tt>non_null</tt>, <tt>noinline</tt>,
<tt>noreturn</tt>, <tt>pure</tt>, <tt>regparm</tt>
<tt>noreturn</tt>, <tt>nothrow</tt>, <tt>pure</tt>, <tt>regparm</tt>
<tt>section</tt>, <tt>stdcall</tt>, <tt>unused</tt>, <tt>used</tt>,
<tt>visibility</tt>, <tt>warn_unused_result</tt>, <tt>weak</tt><br>
<b>Ignored:</b> <tt>nothrow</tt>, <tt>malloc</tt>,
<b>Ignored:</b> <tt>malloc</tt>,
<tt>no_instrument_function</tt></li>
</ol>
</li>