Revert "[SampleFDO] Reapply: Refactor SampleProfile.cpp"

Revert "[SampleFDO] Add missing #includes to unbreak modules build after D96455"

This reverts commit c73cbf218a289029cc0b54183c3cf79454ecc76f.

Revert "[SampleFDO] Fix MSVC "namespace uses itself" warning (NFC)"

This reverts commit a23e6b321ca623b83252f8b1e06a2ad4fc441f89.

Revert "[SampleFDO] Reapply: Refactor SampleProfile.cpp"

This reverts commit 6fd5ccff72eeaffcb3b3ba2696282015aab755bc.

Still seeing link failures when building llc (or other tools), due to
the new SampleProfileLoaderBaseImpl.h containing definitions that get
duplicated across multiple TU's.

```
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::findEquivalenceClasses(llvm::Function&)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::buildEdges(llvm::Function&)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::computeDominanceAndLoopInfo(llvm::Function&)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::getFunctionLoc(llvm::Function&)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::getBlockWeight(llvm::BasicBlock const*)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::printBlockWeight(llvm::raw_ostream&, llvm::BasicBlock const*) const' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::printBlockEquivalence(llvm::raw_ostream&, llvm::BasicBlock const*)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
duplicate symbol 'llvm::SampleProfileLoaderBaseImpl::printEdgeWeight(llvm::raw_ostream&, std::__1::pair<llvm::BasicBlock const*, llvm::BasicBlock const*>)' in:
    tools/llc/CMakeFiles/llc.dir/llc.cpp.o
    lib/libLLVMInstCombine.a(InstCombineVectorOps.cpp.o)
```

1 files changed, 0 insertions, 163 deletions

diff --git a/llvm/lib/Transforms/Utils/SampleProfileLoaderBaseUtil.cpp b/llvm/lib/Transforms/Utils/SampleProfileLoaderBaseUtil.cpp
deleted file mode 100644
index d2cd0de..0000000
--- a/llvm/lib/Transforms/Utils/SampleProfileLoaderBaseUtil.cpp
+++ /dev/null
@@ -1,163 +0,0 @@
-//===- SampleProfileLoaderBaseUtil.cpp - Profile loader Util func ---------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the SampleProfileLoader base utility functions.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/SampleProfileLoaderBaseUtil.h"
-
-namespace llvm {
-
-cl::opt<unsigned> SampleProfileMaxPropagateIterations(
-    "sample-profile-max-propagate-iterations", cl::init(100),
-    cl::desc("Maximum number of iterations to go through when propagating "
-             "sample block/edge weights through the CFG."));
-
-cl::opt<unsigned> SampleProfileRecordCoverage(
-    "sample-profile-check-record-coverage", cl::init(0), cl::value_desc("N"),
-    cl::desc("Emit a warning if less than N% of records in the input profile "
-             "are matched to the IR."));
-
-cl::opt<unsigned> SampleProfileSampleCoverage(
-    "sample-profile-check-sample-coverage", cl::init(0), cl::value_desc("N"),
-    cl::desc("Emit a warning if less than N% of samples in the input profile "
-             "are matched to the IR."));
-
-cl::opt<bool> NoWarnSampleUnused(
-    "no-warn-sample-unused", cl::init(false), cl::Hidden,
-    cl::desc("Use this option to turn off/on warnings about function with "
-             "samples but without debug information to use those samples. "));
-
-namespace sampleprofutil {
-
-/// Return true if the given callsite is hot wrt to hot cutoff threshold.
-///
-/// Functions that were inlined in the original binary will be represented
-/// in the inline stack in the sample profile. If the profile shows that
-/// the original inline decision was "good" (i.e., the callsite is executed
-/// frequently), then we will recreate the inline decision and apply the
-/// profile from the inlined callsite.
-///
-/// To decide whether an inlined callsite is hot, we compare the callsite
-/// sample count with the hot cutoff computed by ProfileSummaryInfo, it is
-/// regarded as hot if the count is above the cutoff value.
-///
-/// When ProfileAccurateForSymsInList is enabled and profile symbol list
-/// is present, functions in the profile symbol list but without profile will
-/// be regarded as cold and much less inlining will happen in CGSCC inlining
-/// pass, so we tend to lower the hot criteria here to allow more early
-/// inlining to happen for warm callsites and it is helpful for performance.
-bool callsiteIsHot(const FunctionSamples *CallsiteFS, ProfileSummaryInfo *PSI,
-                   bool ProfAccForSymsInList) {
-  if (!CallsiteFS)
-    return false; // The callsite was not inlined in the original binary.
-
-  assert(PSI && "PSI is expected to be non null");
-  uint64_t CallsiteTotalSamples = CallsiteFS->getTotalSamples();
-  if (ProfAccForSymsInList)
-    return !PSI->isColdCount(CallsiteTotalSamples);
-  else
-    return PSI->isHotCount(CallsiteTotalSamples);
-}
-
-/// Mark as used the sample record for the given function samples at
-/// (LineOffset, Discriminator).
-///
-/// \returns true if this is the first time we mark the given record.
-bool SampleCoverageTracker::markSamplesUsed(const FunctionSamples *FS,
-                                            uint32_t LineOffset,
-                                            uint32_t Discriminator,
-                                            uint64_t Samples) {
-  LineLocation Loc(LineOffset, Discriminator);
-  unsigned &Count = SampleCoverage[FS][Loc];
-  bool FirstTime = (++Count == 1);
-  if (FirstTime)
-    TotalUsedSamples += Samples;
-  return FirstTime;
-}
-
-/// Return the number of sample records that were applied from this profile.
-///
-/// This count does not include records from cold inlined callsites.
-unsigned
-SampleCoverageTracker::countUsedRecords(const FunctionSamples *FS,
-                                        ProfileSummaryInfo *PSI) const {
-  auto I = SampleCoverage.find(FS);
-
-  // The size of the coverage map for FS represents the number of records
-  // that were marked used at least once.
-  unsigned Count = (I != SampleCoverage.end()) ? I->second.size() : 0;
-
-  // If there are inlined callsites in this function, count the samples found
-  // in the respective bodies. However, do not bother counting callees with 0
-  // total samples, these are callees that were never invoked at runtime.
-  for (const auto &I : FS->getCallsiteSamples())
-    for (const auto &J : I.second) {
-      const FunctionSamples *CalleeSamples = &J.second;
-      if (callsiteIsHot(CalleeSamples, PSI, ProfAccForSymsInList))
-        Count += countUsedRecords(CalleeSamples, PSI);
-    }
-
-  return Count;
-}
-
-/// Return the number of sample records in the body of this profile.
-///
-/// This count does not include records from cold inlined callsites.
-unsigned
-SampleCoverageTracker::countBodyRecords(const FunctionSamples *FS,
-                                        ProfileSummaryInfo *PSI) const {
-  unsigned Count = FS->getBodySamples().size();
-
-  // Only count records in hot callsites.
-  for (const auto &I : FS->getCallsiteSamples())
-    for (const auto &J : I.second) {
-      const FunctionSamples *CalleeSamples = &J.second;
-      if (callsiteIsHot(CalleeSamples, PSI, ProfAccForSymsInList))
-        Count += countBodyRecords(CalleeSamples, PSI);
-    }
-
-  return Count;
-}
-
-/// Return the number of samples collected in the body of this profile.
-///
-/// This count does not include samples from cold inlined callsites.
-uint64_t
-SampleCoverageTracker::countBodySamples(const FunctionSamples *FS,
-                                        ProfileSummaryInfo *PSI) const {
-  uint64_t Total = 0;
-  for (const auto &I : FS->getBodySamples())
-    Total += I.second.getSamples();
-
-  // Only count samples in hot callsites.
-  for (const auto &I : FS->getCallsiteSamples())
-    for (const auto &J : I.second) {
-      const FunctionSamples *CalleeSamples = &J.second;
-      if (callsiteIsHot(CalleeSamples, PSI, ProfAccForSymsInList))
-        Total += countBodySamples(CalleeSamples, PSI);
-    }
-
-  return Total;
-}
-
-/// Return the fraction of sample records used in this profile.
-///
-/// The returned value is an unsigned integer in the range 0-100 indicating
-/// the percentage of sample records that were used while applying this
-/// profile to the associated function.
-unsigned SampleCoverageTracker::computeCoverage(unsigned Used,
-                                                unsigned Total) const {
-  assert(Used <= Total &&
-         "number of used records cannot exceed the total number of records");
-  return Total > 0 ? Used * 100 / Total : 100;
-}
-
-} // end of namespace sampleprofutil
-} // end of namespace llvm