Fixed/added namespace ending comments using clang-tidy. NFC

The patch is generated using this command:

tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
  -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
  llvm/lib/


Thanks to Eugene Kosov for the original patch!

llvm-svn: 240137
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index a8d0172..29ecc1d 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -193,7 +193,7 @@
       void incCreateInstNum() {}
     #endif
   };
-}
+} // namespace
 
 //===----------------------------------------------------------------------===//
 //
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
index a554e9f..6b384b4 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
@@ -948,7 +948,7 @@
   UDivFoldAction(FoldUDivOperandCb FA, Value *InputOperand, size_t SLHS)
       : FoldAction(FA), OperandToFold(InputOperand), SelectLHSIdx(SLHS) {}
 };
-}
+} // namespace
 
 // X udiv 2^C -> X >> C
 static Instruction *foldUDivPow2Cst(Value *Op0, Value *Op1,
diff --git a/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp b/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
index 6a6693c..a93ffbe 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp
@@ -582,7 +582,7 @@
   LoweredPHIRecord(PHINode *pn, unsigned Sh)
     : PN(pn), Shift(Sh), Width(0) {}
 };
-}
+} // namespace
 
 namespace llvm {
   template<>
@@ -603,7 +603,7 @@
              LHS.Width == RHS.Width;
     }
   };
-}
+} // namespace llvm
 
 
 /// SliceUpIllegalIntegerPHI - This is an integer PHI and we know that it has an
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index d690a79..53950ae 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -3046,7 +3046,7 @@
   void getAnalysisUsage(AnalysisUsage &AU) const override;
   bool runOnFunction(Function &F) override;
 };
-}
+} // namespace
 
 void InstructionCombiningPass::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.setPreservesCFG();