[llvm-mca] Move namespace mca inside llvm::

Summary: This allows to remove `using namespace llvm;` in those *.cpp files

When we want to revisit the decision (everything resides in llvm::mca::*) in the future, we can move things to a nested namespace of llvm::mca::, to conceptually make them separate from the rest of llvm::mca::*

Reviewers: andreadb, mattd

Reviewed By: andreadb

Subscribers: javed.absar, tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D53407

llvm-svn: 345612

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/tools/llvm-mca/lib/Instruction.cpp b/llvm/tools/llvm-mca/lib/Instruction.cpp
index 42f5cd38ee9..832a6199f00 100644
--- a/llvm/tools/llvm-mca/lib/Instruction.cpp
+++ b/llvm/tools/llvm-mca/lib/Instruction.cpp
@@ -16,10 +16,9 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 
+namespace llvm {
 namespace mca {
 
-using namespace llvm;
-
 void ReadState::writeStartEvent(unsigned Cycles) {
   assert(DependentWrites);
   assert(CyclesLeft == UNKNOWN_CYCLES);
@@ -181,3 +180,4 @@ void Instruction::cycleEvent() {
 const unsigned WriteRef::INVALID_IID = std::numeric_limits<unsigned>::max();
 
 } // namespace mca
+} // namespace llvm