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/utils/TableGen/AsmWriterEmitter.cpp b/llvm/utils/TableGen/AsmWriterEmitter.cpp
index 8fbb2cfbb61..18b07595611 100644
--- a/llvm/utils/TableGen/AsmWriterEmitter.cpp
+++ b/llvm/utils/TableGen/AsmWriterEmitter.cpp
@@ -363,7 +363,7 @@ FindUniqueOperandCommands(std::vector<std::string> &UniqueOperandCommands,
   
   for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
     const AsmWriterInst *Inst = getAsmWriterInstByID(i);
-    if (Inst == 0) continue;  // PHI, INLINEASM, LABEL, etc.
+    if (Inst == 0) continue;  // PHI, INLINEASM, DBG_LABEL, etc.
     
     std::string Command;
     if (Inst->Operands.empty())
@@ -641,7 +641,7 @@ void AsmWriterEmitter::run(std::ostream &O) {
     << "    O << \"\\t\";\n"
     << "    printInlineAsm(MI);\n"
     << "    return true;\n"
-    << "  } else if (MI->getOpcode() == TargetInstrInfo::LABEL) {\n"
+    << "  } else if (MI->isLabel()) {\n"
     << "    printLabel(MI);\n"
     << "    return true;\n"
     << "  } else if (MI->getOpcode() == TargetInstrInfo::DECLARE) {\n"