Remove unneeded use of #undef DEBUG_TYPE. NFC

Where is is needed (at the end of headers that define it), be
consistent about its use.

Also fix a few header guards that I found in the process.

Differential Revision: https://reviews.llvm.org/D34916

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307840 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/BlockFrequencyInfoImpl.h

@@ -1353,4 +1353,4 @@ struct BFIDOTGraphTraitsBase : public DefaultDOTGraphTraits {
 
 #undef DEBUG_TYPE
 
-#endif
+#endif // LLVM_ANALYSIS_BLOCKFREQUENCYINFOIMPL_H

include/llvm/Analysis/RegionInfoImpl.h

@@ -34,10 +34,10 @@
 #include <type_traits>
 #include <vector>
 
-namespace llvm {
-
 #define DEBUG_TYPE "region"
 
+namespace llvm {
+
 //===----------------------------------------------------------------------===//
 /// RegionBase Implementation
 template <class Tr>
@@ -901,8 +901,8 @@ void RegionInfoBase<Tr>::calculate(FuncT &F) {
   buildRegionsTree(DT->getNode(BB), TopLevelRegion);
 }
 
-#undef DEBUG_TYPE
-
 } // end namespace llvm
 
+#undef DEBUG_TYPE
+
 #endif // LLVM_ANALYSIS_REGIONINFOIMPL_H

include/llvm/Support/UnicodeCharRanges.h

@@ -18,11 +18,11 @@
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 
+#define DEBUG_TYPE "unicode"
+
 namespace llvm {
 namespace sys {
 
-#define DEBUG_TYPE "unicode"
-
 /// \brief Represents a closed range of Unicode code points [Lower, Upper].
 struct UnicodeCharRange {
   uint32_t Lower;
@@ -99,10 +99,9 @@ private:
   const CharRanges Ranges;
 };
 
-#undef DEBUG_TYPE // "unicode"
-
 } // namespace sys
 } // namespace llvm
 
+#undef DEBUG_TYPE // "unicode"
 
 #endif // LLVM_SUPPORT_UNICODECHARRANGES_H

include/llvm/Transforms/Utils/SSAUpdaterImpl.h

@@ -22,10 +22,10 @@
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Debug.h"
 
-namespace llvm {
-
 #define DEBUG_TYPE "ssaupdater"
 
+namespace llvm {
+
 class CastInst;
 class PHINode;
 template<typename T> class SSAUpdaterTraits;
@@ -453,8 +453,8 @@ public:
   }
 };
 
-#undef DEBUG_TYPE // "ssaupdater"
+} // end llvm namespace
 
-} // End llvm namespace
+#undef DEBUG_TYPE // "ssaupdater"
 
-#endif
+#endif // LLVM_TRANSFORMS_UTILS_SSAUPDATERIMPL_H

lib/CodeGen/RegAllocPBQP.cpp

@@ -924,5 +924,3 @@ FunctionPass *llvm::createPBQPRegisterAllocator(char *customPassID) {
 FunctionPass* llvm::createDefaultPBQPRegisterAllocator() {
   return createPBQPRegisterAllocator();
 }
-
-#undef DEBUG_TYPE

lib/Target/NVPTX/NVPTXISelLowering.cpp

@@ -62,7 +62,6 @@
 #include <utility>
 #include <vector>
 
-#undef DEBUG_TYPE
 #define DEBUG_TYPE "nvptx-lower"
 
 using namespace llvm;

lib/Transforms/Instrumentation/CFGMST.h

@@ -12,6 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_LIB_TRANSFORMS_INSTRUMENTATION_CFGMST_H
+#define LLVM_LIB_TRANSFORMS_INSTRUMENTATION_CFGMST_H
+
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Analysis/BlockFrequencyInfo.h"
@@ -24,10 +27,10 @@
 #include <utility>
 #include <vector>
 
-namespace llvm {
-
 #define DEBUG_TYPE "cfgmst"
 
+namespace llvm {
+
 /// \brief An union-find based Minimum Spanning Tree for CFG
 ///
 /// Implements a Union-find algorithm to compute Minimum Spanning Tree
@@ -220,5 +223,8 @@ public:
   }
 };
 
-#undef DEBUG_TYPE // "cfgmst"
 } // end namespace llvm
+
+#undef DEBUG_TYPE // "cfgmst"
+
+#endif // LLVM_LIB_TRANSFORMS_INSTRUMENTATION_CFGMST_H

lib/Transforms/Instrumentation/MaximumSpanningTree.h

@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_ANALYSIS_MAXIMUMSPANNINGTREE_H
-#define LLVM_ANALYSIS_MAXIMUMSPANNINGTREE_H
+#ifndef LLVM_LIB_TRANSFORMS_INSTRUMENTATION_MAXIMUMSPANNINGTREE_H
+#define LLVM_LIB_TRANSFORMS_INSTRUMENTATION_MAXIMUMSPANNINGTREE_H
 
 #include "llvm/ADT/EquivalenceClasses.h"
 #include "llvm/IR/BasicBlock.h"
@@ -108,4 +108,4 @@ namespace llvm {
 
 } // End llvm namespace
 
-#endif
+#endif // LLVM_LIB_TRANSFORMS_INSTRUMENTATION_MAXIMUMSPANNINGTREE_H