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, 2 insertions, 1 deletions

diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index a2fef465fa0..18cedcf7579 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -97,7 +97,8 @@ MipsTargetLowering(MipsTargetMachine &TM): TargetLowering(TM)
   // We don't have line number support yet.
   setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
   setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
-  setOperationAction(ISD::LABEL, MVT::Other, Expand);
+  setOperationAction(ISD::DBG_LABEL, MVT::Other, Expand);
+  setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
 
   // Use the default for now
   setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);