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Split ISD::LABEL into ISD::DBG_LABEL and ISD::EH_LABEL, eliminating

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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-01 00:05:16 +00:00
parent c2bf1870a7
commit 4406604047
35 changed files with 192 additions and 114 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
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@@ -144,6 +144,8 @@ std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
Op += ":" + utostr(D->getLine());
if (D->getColumn() != 0)
Op += ":" + utostr(D->getColumn());
} else if (const LabelSDNode *L = dyn_cast<LabelSDNode>(Node)) {
Op += ": LabelID=" + utostr(L->getLabelID());
} else if (const ExternalSymbolSDNode *ES =
dyn_cast<ExternalSymbolSDNode>(Node)) {
Op += "'" + std::string(ES->getSymbol()) + "'";