Rename usesCustomDAGSchedInserter to usesCustomInserter, and update a
bunch of associated comments, because it doesn't have anything to do
with DAGs or scheduling. This is another step in decoupling MachineInstr
emitting from scheduling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85517 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
index 425f670..53bebbb 100644
--- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
+++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
@@ -556,7 +556,7 @@
MI->setMemRefs(cast<MachineSDNode>(Node)->memoperands_begin(),
cast<MachineSDNode>(Node)->memoperands_end());
- if (II.usesCustomDAGSchedInsertionHook()) {
+ if (II.usesCustomInsertionHook()) {
// Insert this instruction into the basic block using a target
// specific inserter which may returns a new basic block.
MBB = TLI->EmitInstrWithCustomInserter(MI, MBB, EM);
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 8569e0c..6d4562d 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -150,16 +150,20 @@
}
// EmitInstrWithCustomInserter - This method should be implemented by targets
-// that mark instructions with the 'usesCustomDAGSchedInserter' flag. These
+// that mark instructions with the 'usesCustomInserter' flag. These
// instructions are special in various ways, which require special support to
// insert. The specified MachineInstr is created but not inserted into any
-// basic blocks, and the scheduler passes ownership of it to this method.
+// basic blocks, and this method is called to expand it into a sequence of
+// instructions, potentially also creating new basic blocks and control flow.
+// When new basic blocks are inserted and the edges from MBB to its successors
+// are modified, the method should insert pairs of <OldSucc, NewSucc> into the
+// DenseMap.
MachineBasicBlock *TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
MachineBasicBlock *MBB,
DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const {
#ifndef NDEBUG
errs() << "If a target marks an instruction with "
- "'usesCustomDAGSchedInserter', it must implement "
+ "'usesCustomInserter', it must implement "
"TargetLowering::EmitInstrWithCustomInserter!";
#endif
llvm_unreachable(0);