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some 3.0 API notes

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140851 91177308-0d34-0410-b5e6-96231b3b80d8
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Torok Edwin 2011-09-30 13:07:52 +00:00
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docs/ReleaseNotes.html
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@ -689,6 +689,24 @@ it run faster:</p>
information in the LLVM IR now expects clients to use <code>DIBuilder::finalize()</code>
at the end of translation unit to complete debugging information encoding.</li>
<li>The way the type system works has been rewritten: <code>PATypeHolder</code>
and <code>OpaqueType</code> are gone, and all APIs deal with <code>Type*</code>
instead of <code>const Type*</code>.
If you need to create recursive structures, then create a named structure,
and use <code>setBody()</code> when all its elements are built.
Type merging and refining is gone too: named structures are not
merged with other structures, even if their layout is identical.
(of course anonymous structures are still uniqued by layout).
</li>
<li>TargetSelect.h moved to Support/ from Target/</li>
<li>UpgradeIntrinsicCall no longer upgrades pre-2.9 intrinsic calls
(for example <code>llvm.memset.i32</code>).</li>
<li>It is mandatory to initialize all out-of-tree passes too and their dependencies now with
<code>INITIALIZE_PASS{BEGIN,END,}</code> and <code>INITIALIZE_{PASS,AG}_DEPENDENCY</code>.</li>
</ul>
</div>