Fix some clang-tidy namespace closing comments warnings. NFC.

llvm/lib/IR/FPEnv.cpp

@@ -80,4 +80,4 @@ Optional<StringRef> ExceptionBehaviorToStr(fp::ExceptionBehavior UseExcept) {
   }
   return ExceptStr;
 }
-}
+} // namespace llvm

llvm/lib/IR/LegacyPassManager.cpp

@@ -387,8 +387,8 @@ class FunctionPassManagerImpl : public Pass,
 void FunctionPassManagerImpl::anchor() {}
 
 char FunctionPassManagerImpl::ID = 0;
-} // End of legacy namespace
-} // End of llvm namespace
+} // namespace legacy
+} // namespace llvm
 
 namespace {
 //===----------------------------------------------------------------------===//
@@ -533,8 +533,8 @@ class PassManagerImpl : public Pass,
 void PassManagerImpl::anchor() {}
 
 char PassManagerImpl::ID = 0;
-} // End of legacy namespace
-} // End of llvm namespace
+} // namespace legacy
+} // namespace llvm
 
 //===----------------------------------------------------------------------===//
 // PMTopLevelManager implementation

llvm/lib/IR/Operator.cpp

@@ -134,4 +134,4 @@ bool GEPOperator::accumulateConstantOffset(
   }
   return true;
 }
-}
+} // namespace llvm

llvm/lib/IR/PassManager.cpp

@@ -89,7 +89,7 @@ bool FunctionAnalysisManagerModuleProxy::Result::invalidate(
   // Return false to indicate that this result is still a valid proxy.
   return false;
 }
-}
+} // namespace llvm
 
 AnalysisSetKey CFGAnalyses::SetKey;
 

llvm/lib/IR/SafepointIRVerifier.cpp

@@ -208,7 +208,7 @@ PreservedAnalyses SafepointIRVerifierPass::run(Function &F,
   Verify(F, DT, CD);
   return PreservedAnalyses::all();
 }
-}
+} // namespace llvm
 
 namespace {
 

llvm/lib/IR/Use.cpp

@@ -48,4 +48,4 @@ void Use::zap(Use *Start, const Use *Stop, bool del) {
     ::operator delete(Start);
 }
 
-} // End llvm namespace
+} // namespace llvm

llvm/lib/IR/User.cpp

@@ -195,4 +195,4 @@ LLVM_NO_SANITIZE_MEMORY_ATTRIBUTE void User::operator delete(void *Usr) {
   }
 }
 
-} // End llvm namespace
+} // namespace llvm