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

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index 7194ed0ab6..de2c1bc90a 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -879,10 +879,17 @@ void ScheduleDAG::EmitNode(SDNode *Node, bool IsClone,
       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);