Reapplying r331819 [GlobalISel][Legalizer] More concise and faster widenScalar, NFC

    The commit was a suspect for clang-cmake-aarch64-global-isel and
    clang-cmake-aarch64-quick bot failures, proved to be innocent.

llvm-svn: 331898
diff --git a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index 273044b..a3bf45f 100644
--- a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -53,6 +53,11 @@
   State.II = II;
 }
 
+void MachineIRBuilderBase::recordInsertion(MachineInstr *InsertedInstr) const {
+  if (State.InsertedInstr)
+    State.InsertedInstr(InsertedInstr);
+}
+
 void MachineIRBuilderBase::recordInsertions(
     std::function<void(MachineInstr *)> Inserted) {
   State.InsertedInstr = std::move(Inserted);
@@ -77,8 +82,7 @@
 
 MachineInstrBuilder MachineIRBuilderBase::insertInstr(MachineInstrBuilder MIB) {
   getMBB().insert(getInsertPt(), MIB);
-  if (State.InsertedInstr)
-    State.InsertedInstr(MIB);
+  recordInsertion(MIB);
   return MIB;
 }