Revert "[Modules] Add stats to measure performance of building and loading modules."

This reverts commit c4bacc3c9b333bb7032fb96f41d6f5b851623132.

Test "LLVM :: ThinLTO/X86/funcimport-stats.ll" is failing. Reverting now
and will recommit after making the test not fail with the added stats.

lib/Support/MemoryBuffer.cpp

@@ -12,7 +12,6 @@
 
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Statistic.h"
 #include "llvm/Config/config.h"
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/Errno.h"
@@ -35,12 +34,6 @@
 #endif
 using namespace llvm;
 
-#define DEBUG_TYPE "memory-buffer"
-
-ALWAYS_ENABLED_STATISTIC(NumMmapFile, "Number of mmap-ed files.");
-ALWAYS_ENABLED_STATISTIC(NumAllocFile,
-                         "Number of files read into allocated memory buffer.");
-
 //===----------------------------------------------------------------------===//
 // MemoryBuffer implementation itself.
 //===----------------------------------------------------------------------===//
@@ -456,10 +449,8 @@ getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
       // buffer by copying off the stream.
       sys::fs::file_type Type = Status.type();
       if (Type != sys::fs::file_type::regular_file &&
-          Type != sys::fs::file_type::block_file) {
-        ++NumAllocFile;
+          Type != sys::fs::file_type::block_file)
         return getMemoryBufferForStream(FD, Filename);
-      }
 
       FileSize = Status.getSize();
     }
@@ -472,10 +463,8 @@ getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
     std::unique_ptr<MB> Result(
         new (NamedBufferAlloc(Filename)) MemoryBufferMMapFile<MB>(
             RequiresNullTerminator, FD, MapSize, Offset, EC));
-    if (!EC) {
-      ++NumMmapFile;
+    if (!EC)
       return std::move(Result);
-    }
   }
 
   auto Buf = WritableMemoryBuffer::getNewUninitMemBuffer(MapSize, Filename);
@@ -486,7 +475,6 @@ getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
   }
 
   // Read until EOF, zero-initialize the rest.
-  ++NumAllocFile;
   MutableArrayRef<char> ToRead = Buf->getBuffer();
   while (!ToRead.empty()) {
     Expected<size_t> ReadBytes =

lib/Support/Path.cpp

@@ -12,7 +12,6 @@
 
 #include "llvm/Support/Path.h"
 #include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/Statistic.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Errc.h"
@@ -32,10 +31,6 @@
 using namespace llvm;
 using namespace llvm::support::endian;
 
-#define DEBUG_TYPE "file-system"
-
-ALWAYS_ENABLED_STATISTIC(NumStatusCalls, "Number of `status` calls.");
-
 namespace {
   using llvm::StringRef;
   using llvm::sys::path::is_separator;

lib/Support/Unix/Path.inc

@@ -736,7 +736,6 @@ static std::error_code fillStatus(int StatRet, const struct stat &Status,
 }
 
 std::error_code status(const Twine &Path, file_status &Result, bool Follow) {
-  ++NumStatusCalls;
   SmallString<128> PathStorage;
   StringRef P = Path.toNullTerminatedStringRef(PathStorage);
 
@@ -746,7 +745,6 @@ std::error_code status(const Twine &Path, file_status &Result, bool Follow) {
 }
 
 std::error_code status(int FD, file_status &Result) {
-  ++NumStatusCalls;
   struct stat Status;
   int StatRet = ::fstat(FD, &Status);
   return fillStatus(StatRet, Status, Result);

lib/Support/Windows/Path.inc

@@ -710,7 +710,6 @@ handle_status_error:
 }
 
 std::error_code status(const Twine &path, file_status &result, bool Follow) {
-  ++NumStatusCalls;
   SmallString<128> path_storage;
   SmallVector<wchar_t, 128> path_utf16;
 
@@ -743,13 +742,11 @@ std::error_code status(const Twine &path, file_status &result, bool Follow) {
 }
 
 std::error_code status(int FD, file_status &Result) {
-  ++NumStatusCalls;
   HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
   return getStatus(FileHandle, Result);
 }
 
 std::error_code status(file_t FileHandle, file_status &Result) {
-  ++NumStatusCalls;
   return getStatus(FileHandle, Result);
 }