Canonicalize header guards into a common format.

Add header guards to files that were missing guards. Remove #endif comments
as they don't seem common in LLVM (we can easily add them back if we decide
they're useful)

Changes made by clang-tidy with minor tweaks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215558 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/AssemblyAnnotationWriter.h

@@ -14,8 +14,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_IR_ASMANNOTATIONWRITER_H
-#define LLVM_IR_ASMANNOTATIONWRITER_H
+#ifndef LLVM_IR_ASSEMBLYANNOTATIONWRITER_H
+#define LLVM_IR_ASSEMBLYANNOTATIONWRITER_H
 
 namespace llvm {
 

include/llvm/IR/ConstantRange.h

@@ -29,8 +29,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_CONSTANTRANGE_H
-#define LLVM_SUPPORT_CONSTANTRANGE_H
+#ifndef LLVM_IR_CONSTANTRANGE_H
+#define LLVM_IR_CONSTANTRANGE_H
 
 #include "llvm/ADT/APInt.h"
 #include "llvm/Support/DataTypes.h"

include/llvm/IR/DiagnosticInfo.h

@@ -12,8 +12,8 @@
 // Diagnostics reporting is still done as part of the LLVMContext.
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_DIAGNOSTICINFO_H
-#define LLVM_SUPPORT_DIAGNOSTICINFO_H
+#ifndef LLVM_IR_DIAGNOSTICINFO_H
+#define LLVM_IR_DIAGNOSTICINFO_H
 
 #include "llvm-c/Core.h"
 #include "llvm/ADT/ArrayRef.h"

include/llvm/IR/DiagnosticPrinter.h

@@ -13,8 +13,8 @@
 // on their needs.
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_SUPPORT_DIAGNOSTICPRINTER_H
-#define LLVM_SUPPORT_DIAGNOSTICPRINTER_H
+#ifndef LLVM_IR_DIAGNOSTICPRINTER_H
+#define LLVM_IR_DIAGNOSTICPRINTER_H
 
 #include <string>
 

include/llvm/IR/IRPrintingPasses.h

@@ -16,8 +16,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_IR_IR_PRINTING_PASSES_H
-#define LLVM_IR_IR_PRINTING_PASSES_H
+#ifndef LLVM_IR_IRPRINTINGPASSES_H
+#define LLVM_IR_IRPRINTINGPASSES_H
 
 #include "llvm/ADT/StringRef.h"
 #include <string>

include/llvm/IR/LegacyPassManagers.h

@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_PASSMANAGERS_H
-#define LLVM_PASSMANAGERS_H
+#ifndef LLVM_IR_LEGACYPASSMANAGERS_H
+#define LLVM_IR_LEGACYPASSMANAGERS_H
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"

include/llvm/IR/Mangler.h

@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TARGET_MANGLER_H
-#define LLVM_TARGET_MANGLER_H
+#ifndef LLVM_IR_MANGLER_H
+#define LLVM_IR_MANGLER_H
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/raw_ostream.h"
@@ -66,4 +66,4 @@ public:
 
 } // End llvm namespace
 
-#endif // LLVM_TARGET_MANGLER_H
+#endif

include/llvm/IR/PassManager.h

@@ -35,8 +35,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_IR_PASS_MANAGER_H
-#define LLVM_IR_PASS_MANAGER_H
+#ifndef LLVM_IR_PASSMANAGER_H
+#define LLVM_IR_PASSMANAGER_H
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/STLExtras.h"

include/llvm/IR/PredIteratorCache.h

@@ -11,14 +11,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_IR_PREDITERATORCACHE_H
+#define LLVM_IR_PREDITERATORCACHE_H
+
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/Support/Allocator.h"
 
-#ifndef LLVM_IR_PREDITERATORCACHE_H
-#define LLVM_IR_PREDITERATORCACHE_H
-
 namespace llvm {
 
   /// PredIteratorCache - This class is an extremely trivial cache for