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

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/Collector.cpp b/llvm/lib/CodeGen/Collector.cpp
index 6c5263d73e3..bbb3b938ad9 100644
--- a/llvm/lib/CodeGen/Collector.cpp
+++ b/llvm/lib/CodeGen/Collector.cpp
@@ -337,7 +337,7 @@ void MachineCodeAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
 unsigned MachineCodeAnalysis::InsertLabel(MachineBasicBlock &MBB, 
                                      MachineBasicBlock::iterator MI) const {
   unsigned Label = MMI->NextLabelID();
-  BuildMI(MBB, MI, TII->get(TargetInstrInfo::LABEL)).addImm(Label).addImm(2);
+  BuildMI(MBB, MI, TII->get(TargetInstrInfo::GC_LABEL)).addImm(Label);
   return Label;
 }