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, 2 deletions

diff --git a/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp b/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
index 7f015369d56..842eb25d579 100644
--- a/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
@@ -325,7 +325,7 @@ unsigned char* JITDwarfEmitter::EmitExceptionTable(MachineFunction* MF,
         I != E; ++I) {
     for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
           MI != E; ++MI) {
-      if (MI->getOpcode() != TargetInstrInfo::LABEL) {
+      if (!MI->isLabel()) {
         MayThrow |= MI->getDesc().isCall();
         continue;
       }
@@ -940,7 +940,7 @@ JITDwarfEmitter::GetExceptionTableSizeInBytes(MachineFunction* MF) const {
         I != E; ++I) {
     for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
           MI != E; ++MI) {
-      if (MI->getOpcode() != TargetInstrInfo::LABEL) {
+      if (!MI->isLabel()) {
         MayThrow |= MI->getDesc().isCall();
         continue;
       }