[CodeGen] Introduce `MachineDomTreeUpdater` (#95369)

This commit converts most of `DomTreeUpdater` into
`GenericDomTreeUpdater` class template, so IR and MIR can reuse some
codes.
There are some differences between interfaces of `BasicBlock` and
`MachineBasicBlock`, so subclasses still need to implement some
functions, like `forceFlushDeletedBB`.

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
index abf43e3..533ab7c 100644
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -315,6 +315,12 @@ bool MachineBasicBlock::isLegalToHoistInto() const {
   return true;
 }
 
+bool MachineBasicBlock::hasName() const {
+  if (const BasicBlock *LBB = getBasicBlock())
+    return LBB->hasName();
+  return false;
+}
+
 StringRef MachineBasicBlock::getName() const {
   if (const BasicBlock *LBB = getBasicBlock())
     return LBB->getName();