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Dan Gohman fb19f9402b Split ISD::LABEL into ISD::DBG_LABEL and ISD::EH_LABEL, eliminating
the need for a flavor operand, and add a new SDNode subclass,
LabelSDNode, for use with them to eliminate the need for a label id
operand.

Change instruction selection to let these label nodes through
unmodified instead of creating copies of them. Teach the MachineInstr
emitter how to emit a MachineInstr directly from an ISD label node.

This avoids the need for allocating SDNodes for the label id and
flavor value, as well as SDNodes for each of the post-isel label,
label id, and label flavor.

llvm-svn: 52943
2008-07-01 00:05:16 +00:00
clang Temporarily treat "Autorelease" as "StopTracking". This is the original behavior. 2008-07-01 00:01:02 +00:00
llvm Split ISD::LABEL into ISD::DBG_LABEL and ISD::EH_LABEL, eliminating 2008-07-01 00:05:16 +00:00