Revert r329156 "Add llvm-exegesis tool."

Breaks a bunch of bots.

llvm-svn: 329157

1 files changed, 0 insertions, 129 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/PerfHelper.cpp b/llvm/tools/llvm-exegesis/lib/PerfHelper.cpp
deleted file mode 100644
index bba0433ad5d..00000000000
--- a/llvm/tools/llvm-exegesis/lib/PerfHelper.cpp
+++ /dev/null
@@ -1,129 +0,0 @@
-//===-- PerfHelper.cpp ------------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "PerfHelper.h"
-#include "llvm/Config/config.h"
-#include "llvm/Support/raw_ostream.h"
-#ifdef HAVE_LIBPFM
-#include "perfmon/perf_event.h"
-#include "perfmon/pfmlib.h"
-#include "perfmon/pfmlib_perf_event.h"
-#endif
-
-namespace exegesis {
-namespace pfm {
-
-#ifdef HAVE_LIBPFM
-static bool isPfmError(int Code) { return Code != PFM_SUCCESS; }
-#endif
-
-bool pfmInitialize() {
-#ifdef HAVE_LIBPFM
-  return isPfmError(pfm_initialize());
-#else
-  return true;
-#endif
-}
-
-void pfmTerminate() {
-#ifdef HAVE_LIBPFM
-  pfm_terminate();
-#endif
-}
-
-PerfEvent::~PerfEvent() {
-#ifdef HAVE_LIBPFM
-  delete Attr;
-  ;
-#endif
-}
-
-PerfEvent::PerfEvent(PerfEvent &&Other)
-    : EventString(std::move(Other.EventString)),
-      FullQualifiedEventString(std::move(Other.FullQualifiedEventString)),
-      Attr(Other.Attr) {
-  Other.Attr = nullptr;
-}
-
-PerfEvent::PerfEvent(llvm::StringRef PfmEventString)
-    : EventString(PfmEventString.str()), Attr(nullptr) {
-#ifdef HAVE_LIBPFM
-  char *Fstr = nullptr;
-  pfm_perf_encode_arg_t Arg = {};
-  Attr = new perf_event_attr();
-  Arg.attr = Attr;
-  Arg.fstr = &Fstr;
-  Arg.size = sizeof(pfm_perf_encode_arg_t);
-  const int Result = pfm_get_os_event_encoding(EventString.c_str(), PFM_PLM3,
-                                               PFM_OS_PERF_EVENT, &Arg);
-  if (isPfmError(Result)) {
-    // We don't know beforehand which counters are available (e.g. 6 uops ports
-    // on Sandybridge but 8 on Haswell) so we report the missing counter without
-    // crashing.
-    llvm::errs() << pfm_strerror(Result) << " - cannot create event "
-                 << EventString;
-  }
-  if (Fstr) {
-    FullQualifiedEventString = Fstr;
-    free(Fstr);
-  }
-#endif
-}
-
-llvm::StringRef PerfEvent::name() const { return EventString; }
-
-bool PerfEvent::valid() const { return !FullQualifiedEventString.empty(); }
-
-const perf_event_attr *PerfEvent::attribute() const { return Attr; }
-
-llvm::StringRef PerfEvent::getPfmEventString() const {
-  return FullQualifiedEventString;
-}
-
-#ifdef HAVE_LIBPFM
-Counter::Counter(const PerfEvent &Event) {
-  const pid_t Pid = 0;    // measure current process/thread.
-  const int Cpu = -1;     // measure any processor.
-  const int GroupFd = -1; // no grouping of counters.
-  const uint32_t Flags = 0;
-  perf_event_attr AttrCopy = *Event.attribute();
-  FileDescriptor = perf_event_open(&AttrCopy, Pid, Cpu, GroupFd, Flags);
-  assert(FileDescriptor != -1 &&
-         "Unable to open event, make sure your kernel allows user space perf "
-         "monitoring.");
-}
-
-Counter::~Counter() { close(FileDescriptor); }
-
-void Counter::start() { ioctl(FileDescriptor, PERF_EVENT_IOC_RESET, 0); }
-
-void Counter::stop() { ioctl(FileDescriptor, PERF_EVENT_IOC_DISABLE, 0); }
-
-int64_t Counter::read() const {
-  int64_t Count = 0;
-  ::read(FileDescriptor, &Count, sizeof(Count));
-  return Count;
-}
-
-#else
-
-Counter::Counter(const PerfEvent &Event) : FileDescriptor(-1) {}
-
-Counter::~Counter() = default;
-
-void Counter::start() {}
-
-void Counter::stop() {}
-
-int64_t Counter::read() const { return 42; }
-
-#endif
-
-} // namespace pfm
-} // namespace exegesis