DebugInfo: Drop rest of DIDescriptor subclasses

Delete the remaining subclasses of (the already deleted) `DIDescriptor`.
Part of PR23080.

llvm-svn: 235404
diff --git a/llvm/lib/Transforms/Utils/AddDiscriminators.cpp b/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
index dd88f3d..125aab2 100644
--- a/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
+++ b/llvm/lib/Transforms/Utils/AddDiscriminators.cpp
@@ -174,14 +174,14 @@
   for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
     BasicBlock *B = I;
     TerminatorInst *Last = B->getTerminator();
-    DILocation LastDIL = Last->getDebugLoc().get();
+    const MDLocation *LastDIL = Last->getDebugLoc();
     if (!LastDIL)
       continue;
 
     for (unsigned I = 0; I < Last->getNumSuccessors(); ++I) {
       BasicBlock *Succ = Last->getSuccessor(I);
       Instruction *First = Succ->getFirstNonPHIOrDbgOrLifetime();
-      DILocation FirstDIL = First->getDebugLoc().get();
+      const MDLocation *FirstDIL = First->getDebugLoc();
       if (!FirstDIL)
         continue;
 
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index 5672a36..492dc07 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -978,7 +978,7 @@
 ///
 
 /// See if there is a dbg.value intrinsic for DIVar before I.
-static bool LdStHasDebugValue(DIVariable &DIVar, Instruction *I) {
+static bool LdStHasDebugValue(const MDLocalVariable *DIVar, Instruction *I) {
   // Since we can't guarantee that the original dbg.declare instrinsic
   // is removed by LowerDbgDeclare(), we need to make sure that we are
   // not inserting the same dbg.value intrinsic over and over.
@@ -998,8 +998,8 @@
 /// that has an associated llvm.dbg.decl intrinsic.
 bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
                                            StoreInst *SI, DIBuilder &Builder) {
-  DIVariable DIVar = DDI->getVariable();
-  DIExpression DIExpr = DDI->getExpression();
+  auto *DIVar = DDI->getVariable();
+  auto *DIExpr = DDI->getExpression();
   assert(DIVar && "Missing variable");
 
   if (LdStHasDebugValue(DIVar, SI))
@@ -1025,8 +1025,8 @@
 /// that has an associated llvm.dbg.decl intrinsic.
 bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
                                            LoadInst *LI, DIBuilder &Builder) {
-  DIVariable DIVar = DDI->getVariable();
-  DIExpression DIExpr = DDI->getExpression();
+  auto *DIVar = DDI->getVariable();
+  auto *DIExpr = DDI->getExpression();
   assert(DIVar && "Missing variable");
 
   if (LdStHasDebugValue(DIVar, LI))
@@ -1075,9 +1075,9 @@
           // This is a call by-value or some other instruction that
           // takes a pointer to the variable. Insert a *value*
           // intrinsic that describes the alloca.
-          DIB.insertDbgValueIntrinsic(AI, 0, DIVariable(DDI->getVariable()),
-                                      DIExpression(DDI->getExpression()),
-                                      DDI->getDebugLoc(), CI);
+          DIB.insertDbgValueIntrinsic(AI, 0, DDI->getVariable(),
+                                      DDI->getExpression(), DDI->getDebugLoc(),
+                                      CI);
         }
       DDI->eraseFromParent();
     }
@@ -1103,8 +1103,8 @@
   if (!DDI)
     return false;
   DebugLoc Loc = DDI->getDebugLoc();
-  DIVariable DIVar = DDI->getVariable();
-  DIExpression DIExpr = DDI->getExpression();
+  auto *DIVar = DDI->getVariable();
+  auto *DIExpr = DDI->getExpression();
   assert(DIVar && "Missing variable");
 
   if (Deref) {