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@@ -355,6 +355,10 @@ Release Notes</a>.</h1>
frozen when register allocation starts. Target hooks should use the
<code>MRI->canReserveReg(FramePtr)</code> method to avoid accidentally
disabling frame pointer elimination during register allocation.</li>
+ <li>A new kind of <code>MachineOperand</code> provides a compact
+ representation of large clobber lists on call instructions. The register
+ mask operand references a bit mask of preserved registers. Everything else is
+ clobbered.</li>
</ul>
</div>