Revert "[HWASAN] Implement selective instrumentation based on profiling information (#83503)"

Broke a build bot: https://lab.llvm.org/buildbot/#/builders/124/builds/9846

This reverts commit e7c3cd2.

Author: kstoimenov

llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp

@@ -15,14 +15,11 @@
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/Analysis/BlockFrequencyInfo.h"
 #include "llvm/Analysis/DomTreeUpdater.h"
 #include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/PostDominators.h"
-#include "llvm/Analysis/ProfileSummaryInfo.h"
 #include "llvm/Analysis/StackSafetyAnalysis.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/Analysis/ValueTracking.h"
@@ -180,18 +177,6 @@ static cl::opt<bool> ClWithTls(
              "platforms that support this"),
     cl::Hidden, cl::init(true));
 
-static cl::opt<bool>
-    CSkipHotCode("hwasan-skip-hot-code",
-                 cl::desc("Do not instument hot functions based on FDO."),
-                 cl::Hidden, cl::init(false));
-
-static cl::opt<int> HotPercentileCutoff("hwasan-percentile-cutoff-hot",
-                                        cl::init(0));
-
-STATISTIC(NumTotalFuncs, "Number of total funcs HWASAN");
-STATISTIC(NumInstrumentedFuncs, "Number of HWASAN instrumented funcs");
-STATISTIC(NumNoProfileSummaryFuncs, "Number of HWASAN funcs without PS");
-
 // Mode for selecting how to insert frame record info into the stack ring
 // buffer.
 enum RecordStackHistoryMode {
@@ -1522,27 +1507,6 @@ void HWAddressSanitizer::sanitizeFunction(Function &F,
   if (!F.hasFnAttribute(Attribute::SanitizeHWAddress))
     return;
 
-  if (F.empty())
-    return;
-
-  NumTotalFuncs++;
-  if (CSkipHotCode) {
-    auto &MAMProxy = FAM.getResult<ModuleAnalysisManagerFunctionProxy>(F);
-    ProfileSummaryInfo *PSI =
-        MAMProxy.getCachedResult<ProfileSummaryAnalysis>(*F.getParent());
-    if (PSI && PSI->hasProfileSummary()) {
-      auto &BFI = FAM.getResult<BlockFrequencyAnalysis>(F);
-      if ((HotPercentileCutoff.getNumOccurrences() && HotPercentileCutoff >= 0)
-              ? PSI->isFunctionHotInCallGraphNthPercentile(HotPercentileCutoff,
-                                                           &F, BFI)
-              : PSI->isFunctionHotInCallGraph(&F, BFI))
-        return;
-    } else {
-      ++NumNoProfileSummaryFuncs;
-    }
-  }
-  NumInstrumentedFuncs++;
-
   LLVM_DEBUG(dbgs() << "Function: " << F.getName() << "\n");
 
   SmallVector<InterestingMemoryOperand, 16> OperandsToInstrument;