[llvm-debuginfo-analyzer] Add support for LLVM IR format.

Fix code formatter issues:
- 'undef' deprecator.
- clang-format issue.

Author: CarlosAlbertoEnciso

llvm/include/llvm/DebugInfo/LogicalView/LVReaderHandler.h

@@ -30,9 +30,9 @@ namespace logicalview {
 
 using LVReaders = std::vector<std::unique_ptr<LVReader>>;
 using ArgVector = std::vector<std::string>;
-using PdbOrObjOrIr = PointerUnion<object::ObjectFile *, pdb::PDBFile *,
-                                  object::IRObjectFile *, MemoryBufferRef *,
-                                  StringRef *>;
+using PdbOrObjOrIr =
+    PointerUnion<object::ObjectFile *, pdb::PDBFile *, object::IRObjectFile *,
+                 MemoryBufferRef *, StringRef *>;
 
 // This class performs the following tasks:
 // - Creates a logical reader for every binary file in the command line,

llvm/lib/DebugInfo/LogicalView/Readers/LVIRReader.cpp

@@ -1923,7 +1923,7 @@ void LVIRReader::processBasicBlocks(Function &F, const DISubprogram *SP) {
       SeenVars.push_back(DVA);
     }
 
-    // Skip undef values.
+    // Skip Undefined values.
     if (!DbgVar->isKillLocation())
       getOrCreateVariable(DbgVar->getVariable(), DbgVar->getDebugLoc().get());
 
@@ -1966,7 +1966,7 @@ void LVIRReader::processBasicBlocks(Function &F, const DISubprogram *SP) {
     DbgValueRanges->printValues(DVA, dbgs());
     DILocalVariable *LV = const_cast<DILocalVariable *>(DVA.getVariable());
     LVSymbol *Symbol = getSymbolForSeenMD(LV);
-    // Undef only value, ignore.
+    // Undefined only value, ignore.
     if (!Symbol)
       continue;