Objective C ABI information.</li>
<li>Loads can now have range metadata attached to them to describe the
possible values being loaded.</li>
+ <li>The <tt>llvm.ctlz</tt> and <tt>llvm.cttz</tt> intrinsics now have an
+ additional argument which indicates whether the behavior of the intrinsic
+ is undefined on a zero input. This can be used to generate more efficient
+ code on platforms that only have instructions which don't return the type
+ size when counting bits in 0.</li>
<li>....</li>
</ul>
</div>
representation of large clobber lists on call instructions. The register
mask operand references a bit mask of preserved registers. Everything else
is clobbered.</li>
+ <li>The DWARF debug info writer gained support for emitting data for the
+ <a href="SourceLevelDebugging.html#acceltable">name accelerator tables
+ DWARF extension</a>. It is used by LLDB to speed up name lookup.</li>
</ul>
<p> We added new TableGen infrastructure to support bundling for
<p>New features and major changes in the X86 target include:</p>
<ul>
- <li>Bug fixes and improved support for AVX1</li>
- <li>Support for AVX2 (still incomplete at this point)</li>
+ <li>Greatly improved support for AVX2.</li>
+ <li>Lots of bug fixes and improvements for AVX1.</li>
+ <li>Support for the FMA4 and XOP instruction set extensions.</li>
<li>Call instructions use the new register mask operands for faster compile
times and better support for different calling conventions. The old WINCALL
instructions are no longer needed.</li>
<li>DW2 Exception Handling is enabled on Cygwin and MinGW.</li>
- <li>Support for implicit TLS model used with MS VC runtime</li>
+ <li>Support for implicit TLS model used with MSVC runtime.</li>
</ul>
</div>