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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46920 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-02-10 07:04:35 +00:00
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@ -66,6 +66,21 @@ It includes many features and refinements from LLVM 2.1.</p>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
<a name="deprecation">Deprecated features in LLVM 2.2</a>
</div>
<div class="doc_text">
<p>This is the last LLVM release to support llvm-gcc 4.0, llvm-upgrade, and
llvmc in its current form. llvm-gcc 4.0 has been replaced with llvm-gcc 4.2.
llvm-upgrade is useful for upgrading llvm 1.9 files to llvm 2.x syntax, but you
can always use an old release to do this. llvmc is currently mostly useless in
llvm 2.2, and will be redesigned or removed in llvm 2.3.</p>
</div>
<!--=========================================================================-->
<div class="doc_subsection">
<a name="frontends">llvm-gcc 4.0, llvm-gcc 4.2, and clang</a>
@ -100,6 +115,8 @@ this project, please see the web site.</p>
<div class="doc_text">
<p>Scott Michel contributed Cell backend</p>
<p>Dale contributed full support for long double on x86/x86-64 (where it is 80
bits) and on Darwin PPC/PPC64 (where it is 128 bits).</p>
@ -131,7 +148,7 @@ optimizer, speeding it up and making it more aggressive. For example:</p>
<li>Daniel Berlin and Curtis Dunham rewrote Andersen's alias analysis (which is
not enabled by default) to be several orders of magnitude faster, implemented
Offline Variable Substitution.</li>
Offline Variable Substitution and Lazy Cycle Detection.</li>
Devang: LoopIndexSplit is enabled by default.
@ -139,8 +156,9 @@ Dan Gohman: LSR improvements for SSE intrinsics and
Evan added simple exit value substitution to LSR.
Anton added readnone/readonly attributes for modelling GCC pure/const
attributes.
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.
</ul>
</div>
@ -169,11 +187,16 @@ targets that support it</li>
<li>Evan enhanced LSR to support induction variable reuse when the induction
variables have different widths.</li>
<li>Rafael Espindola byval support, finished by Evan.</li>
<li>Rafael Espindola byval support, finished by Evan for x86 (32/64).</li>
<li>mod/ref info for machineinstrs</li>
<li>mod/ref info for machineinstrs, inferred from .td files</li>
<li>Evan: Live interval splitting on MBB boundaries.</li>
Efficient iteration over use/defs of registers like llvm ir.
The MachineInstr, MachineOperand and TargetInstrDesc classes are simpler, more
consistent, and better documented.
</ul>
</div>
@ -234,6 +257,9 @@ targets that support it</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>
</ul>
</div>
@ -250,6 +276,7 @@ targets that support it</li>
<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>
</ul>
</div>