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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52943 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index 7194ed0..de2c1bc 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -879,10 +879,17 @@
assert(0 && "EntryToken should have been excluded from the schedule!");
break;
case ISD::TokenFactor: // fall thru
- case ISD::LABEL:
case ISD::DECLARE:
case ISD::SRCVALUE:
break;
+ case ISD::DBG_LABEL:
+ BB->push_back(BuildMI(TII->get(TargetInstrInfo::DBG_LABEL))
+ .addImm(cast<LabelSDNode>(Node)->getLabelID()));
+ break;
+ case ISD::EH_LABEL:
+ BB->push_back(BuildMI(TII->get(TargetInstrInfo::EH_LABEL))
+ .addImm(cast<LabelSDNode>(Node)->getLabelID()));
+ break;
case ISD::CopyToReg: {
unsigned SrcReg;
SDOperand SrcVal = Node->getOperand(2);