Revert "[memprof] Add YAML-based deserialization for MemProf profile (#117829)"

This reverts commit c00e53208db638c35499fc80b555f8e14baa35f0.

It looks like this breaks building LLVM on macOS and some other
platform/compiler combos

https://lab.llvm.org/buildbot/#/builders/23/builds/5252
https://green.lab.llvm.org/job/llvm.org/job/clang-san-iossim/5356/console

In file included from /Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/lib/ProfileData/MemProfReader.cpp:34:
In file included from /Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/ProfileData/MemProfReader.h:24:
In file included from /Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/ProfileData/InstrProfReader.h:22:
In file included from /Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/ProfileData/InstrProfCorrelator.h:21:
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:1173:36: error: implicit instantiation of undefined template 'llvm::yaml::MissingTrait<unsigned long>'
  char missing_yaml_trait_for_type[sizeof(MissingTrait<T>)];
                                   ^
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:961:7: note: in instantiation of function template specialization 'llvm::yaml::yamlize<unsigned long>' requested here
      yamlize(*this, Val, Required, Ctx);
      ^
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:883:11: note: in instantiation of function template specialization 'llvm::yaml::IO::processKey<unsigned long, llvm::yaml::EmptyContext>' requested here
    this->processKey(Key, Val, true, Ctx);
          ^
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/ProfileData/MIBEntryDef.inc:55:1: note: in instantiation of function template specialization 'llvm::yaml::IO::mapRequired<unsigned long>' requested here
MIBEntryDef(AccessHistogram = 27, AccessHistogram, uintptr_t)
^
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/lib/ProfileData/MemProfReader.cpp:77:8: note: expanded from macro 'MIBEntryDef'
    Io.mapRequired(KeyStr.str().c_str(), MIB.Name);                            \
       ^
/Users/ec2-user/jenkins/workspace/llvm.org/clang-san-iossim/llvm-project/llvm/include/llvm/Support/YAMLTraits.h:310:8: note: template is declared here
struct MissingTrait;
       ^
1 error generated.

4 files changed, 0 insertions, 225 deletions

diff --git a/llvm/include/llvm/ProfileData/MemProf.h b/llvm/include/llvm/ProfileData/MemProf.h
index 3b631fa..d64addc 100644
--- a/llvm/include/llvm/ProfileData/MemProf.h
+++ b/llvm/include/llvm/ProfileData/MemProf.h
@@ -19,10 +19,6 @@
 #include <optional>
 
 namespace llvm {
-namespace yaml {
-template <typename T> struct CustomMappingTraits;
-} // namespace yaml
-
 namespace memprof {
 
 struct MemProfRecord;
@@ -197,9 +193,6 @@ struct PortableMemInfoBlock {
     return Result;
   }
 
-  // Give YAML access to the individual MIB fields.
-  friend struct yaml::CustomMappingTraits<memprof::PortableMemInfoBlock>;
-
 private:
   // The set of available fields, indexed by Meta::Name.
   std::bitset<llvm::to_underlying(Meta::Size)> Schema;
@@ -369,8 +362,6 @@ struct IndexedAllocationInfo {
   IndexedAllocationInfo(CallStackId CSId, const MemInfoBlock &MB,
                         const MemProfSchema &Schema = getFullSchema())
       : CSId(CSId), Info(MB, Schema) {}
-  IndexedAllocationInfo(CallStackId CSId, const PortableMemInfoBlock &MB)
-      : CSId(CSId), Info(MB) {}
 
   // Returns the size in bytes when this allocation info struct is serialized.
   size_t serializedSize(const MemProfSchema &Schema,
@@ -507,19 +498,6 @@ struct MemProfRecord {
   }
 };
 
-// Helper struct for AllMemProfData.  In YAML, we treat the GUID and the fields
-// within MemProfRecord at the same level as if the GUID were part of
-// MemProfRecord.
-struct GUIDMemProfRecordPair {
-  GlobalValue::GUID GUID;
-  MemProfRecord Record;
-};
-
-// The top-level data structure, only used with YAML for now.
-struct AllMemProfData {
-  std::vector<GUIDMemProfRecordPair> HeapProfileRecords;
-};
-
 // Reads a memprof schema from a buffer. All entries in the buffer are
 // interpreted as uint64_t. The first entry in the buffer denotes the number of
 // ids in the schema. Subsequent entries are integers which map to memprof::Meta
diff --git a/llvm/include/llvm/ProfileData/MemProfReader.h b/llvm/include/llvm/ProfileData/MemProfReader.h
index 0529f79..bf2f915 100644
--- a/llvm/include/llvm/ProfileData/MemProfReader.h
+++ b/llvm/include/llvm/ProfileData/MemProfReader.h
@@ -209,12 +209,6 @@ private:
   // A mapping of the hash to symbol name, only used if KeepSymbolName is true.
   llvm::DenseMap<uint64_t, std::string> GuidToSymbolName;
 };
-
-class YAMLMemProfReader final : public MemProfReader {
-public:
-  YAMLMemProfReader() = default;
-  void parse(StringRef YAMLData);
-};
 } // namespace memprof
 } // namespace llvm
 
diff --git a/llvm/lib/ProfileData/MemProfReader.cpp b/llvm/lib/ProfileData/MemProfReader.cpp
index 16729c8..921ff34 100644
--- a/llvm/lib/ProfileData/MemProfReader.cpp
+++ b/llvm/lib/ProfileData/MemProfReader.cpp
@@ -40,85 +40,6 @@
 #include "llvm/Support/Path.h"
 
 #define DEBUG_TYPE "memprof"
-
-namespace llvm {
-namespace yaml {
-template <> struct MappingTraits<memprof::Frame> {
-  static void mapping(IO &Io, memprof::Frame &F) {
-    Io.mapRequired("Function", F.Function);
-    Io.mapRequired("LineOffset", F.LineOffset);
-    Io.mapRequired("Column", F.Column);
-    Io.mapRequired("Inline", F.IsInlineFrame);
-
-    // Assert that the definition of Frame matches what we expect.  The
-    // structured bindings below detect changes to the number of fields.
-    // static_assert checks the type of each field.
-    const auto &[Function, SymbolName, LineOffset, Column, IsInlineFrame] = F;
-    static_assert(
-        std::is_same_v<remove_cvref_t<decltype(Function)>, GlobalValue::GUID>);
-    static_assert(std::is_same_v<remove_cvref_t<decltype(SymbolName)>,
-                                 std::unique_ptr<std::string>>);
-    static_assert(
-        std::is_same_v<remove_cvref_t<decltype(LineOffset)>, uint32_t>);
-    static_assert(std::is_same_v<remove_cvref_t<decltype(Column)>, uint32_t>);
-    static_assert(
-        std::is_same_v<remove_cvref_t<decltype(IsInlineFrame)>, bool>);
-  }
-};
-
-template <> struct CustomMappingTraits<memprof::PortableMemInfoBlock> {
-  static void inputOne(IO &Io, StringRef KeyStr,
-                       memprof::PortableMemInfoBlock &MIB) {
-    // PortableMemInfoBlock keeps track of the set of fields that actually have
-    // values.  We update the set here as we receive a key-value pair from the
-    // YAML document.
-#define MIBEntryDef(NameTag, Name, Type)                                       \
-  if (KeyStr == #Name) {                                                       \
-    Io.mapRequired(KeyStr.str().c_str(), MIB.Name);                            \
-    MIB.Schema.set(llvm::to_underlying(memprof::Meta::Name));                  \
-    return;                                                                    \
-  }
-#include "llvm/ProfileData/MIBEntryDef.inc"
-#undef MIBEntryDef
-    Io.setError("Key is not a valid validation event");
-  }
-
-  static void output(IO &Io, memprof::PortableMemInfoBlock &VI) {
-    llvm_unreachable("To be implemented");
-  }
-};
-
-template <> struct MappingTraits<memprof::AllocationInfo> {
-  static void mapping(IO &Io, memprof::AllocationInfo &AI) {
-    Io.mapRequired("Callstack", AI.CallStack);
-    Io.mapRequired("MemInfoBlock", AI.Info);
-  }
-};
-
-// In YAML, we use GUIDMemProfRecordPair instead of MemProfRecord so that we can
-// treat the GUID and the fields within MemProfRecord at the same level as if
-// the GUID were part of MemProfRecord.
-template <> struct MappingTraits<memprof::GUIDMemProfRecordPair> {
-  static void mapping(IO &Io, memprof::GUIDMemProfRecordPair &Pair) {
-    Io.mapRequired("GUID", Pair.GUID);
-    Io.mapRequired("AllocSites", Pair.Record.AllocSites);
-    Io.mapRequired("CallSites", Pair.Record.CallSites);
-  }
-};
-
-template <> struct MappingTraits<memprof::AllMemProfData> {
-  static void mapping(IO &Io, memprof::AllMemProfData &Data) {
-    Io.mapRequired("HeapProfileRecords", Data.HeapProfileRecords);
-  }
-};
-} // namespace yaml
-} // namespace llvm
-
-LLVM_YAML_IS_SEQUENCE_VECTOR(memprof::Frame)
-LLVM_YAML_IS_SEQUENCE_VECTOR(std::vector<memprof::Frame>)
-LLVM_YAML_IS_SEQUENCE_VECTOR(memprof::AllocationInfo)
-LLVM_YAML_IS_SEQUENCE_VECTOR(memprof::GUIDMemProfRecordPair)
-
 namespace llvm {
 namespace memprof {
 namespace {
@@ -835,46 +756,5 @@ Error RawMemProfReader::readNextRecord(
   };
   return MemProfReader::readNextRecord(GuidRecord, IdToFrameCallback);
 }
-
-void YAMLMemProfReader::parse(StringRef YAMLData) {
-  memprof::AllMemProfData Doc;
-  yaml::Input Yin(YAMLData);
-
-  Yin >> Doc;
-  if (Yin.error())
-    return;
-
-  // Add a call stack to MemProfData.CallStacks and return its CallStackId.
-  auto AddCallStack = [&](ArrayRef<Frame> CallStack) -> CallStackId {
-    SmallVector<FrameId> IndexedCallStack;
-    IndexedCallStack.reserve(CallStack.size());
-    for (const Frame &F : CallStack) {
-      FrameId Id = F.hash();
-      MemProfData.Frames.try_emplace(Id, F);
-      IndexedCallStack.push_back(Id);
-    }
-    CallStackId CSId = hashCallStack(IndexedCallStack);
-    MemProfData.CallStacks.try_emplace(CSId, std::move(IndexedCallStack));
-    return CSId;
-  };
-
-  for (const auto &[GUID, Record] : Doc.HeapProfileRecords) {
-    IndexedMemProfRecord IndexedRecord;
-
-    // Convert AllocationInfo to IndexedAllocationInfo.
-    for (const AllocationInfo &AI : Record.AllocSites) {
-      CallStackId CSId = AddCallStack(AI.CallStack);
-      IndexedRecord.AllocSites.emplace_back(CSId, AI.Info);
-    }
-
-    // Populate CallSiteIds.
-    for (const auto &CallSite : Record.CallSites) {
-      CallStackId CSId = AddCallStack(CallSite);
-      IndexedRecord.CallSiteIds.push_back(CSId);
-    }
-
-    MemProfData.Records.try_emplace(GUID, std::move(IndexedRecord));
-  }
-}
 } // namespace memprof
 } // namespace llvm
diff --git a/llvm/unittests/ProfileData/MemProfTest.cpp b/llvm/unittests/ProfileData/MemProfTest.cpp
index 5ab860e..b3b6249 100644
--- a/llvm/unittests/ProfileData/MemProfTest.cpp
+++ b/llvm/unittests/ProfileData/MemProfTest.cpp
@@ -34,7 +34,6 @@ using ::llvm::memprof::CallStackId;
 using ::llvm::memprof::CallStackMap;
 using ::llvm::memprof::Frame;
 using ::llvm::memprof::FrameId;
-using ::llvm::memprof::hashCallStack;
 using ::llvm::memprof::IndexedAllocationInfo;
 using ::llvm::memprof::IndexedMemProfRecord;
 using ::llvm::memprof::MemInfoBlock;
@@ -47,11 +46,8 @@ using ::llvm::memprof::RawMemProfReader;
 using ::llvm::memprof::SegmentEntry;
 using ::llvm::object::SectionedAddress;
 using ::llvm::symbolize::SymbolizableModule;
-using ::testing::ElementsAre;
-using ::testing::Pair;
 using ::testing::Return;
 using ::testing::SizeIs;
-using ::testing::UnorderedElementsAre;
 
 class MockSymbolizer : public SymbolizableModule {
 public:
@@ -746,77 +742,4 @@ TEST(MemProf, RadixTreeBuilderSuccessiveJumps) {
   EXPECT_THAT(Mappings, testing::Contains(testing::Pair(
                             llvm::memprof::hashCallStack(CS4), 10U)));
 }
-
-// Verify that we can parse YAML and retrieve IndexedMemProfData as expected.
-TEST(MemProf, YAMLParser) {
-  StringRef YAMLData = R"YAML(
----
-HeapProfileRecords:
-- GUID: 0xdeadbeef12345678
-  AllocSites:
-  - Callstack:
-    - {Function: 0x100, LineOffset: 11, Column: 10, Inline: true}
-    - {Function: 0x200, LineOffset: 22, Column: 20, Inline: false}
-    MemInfoBlock:
-      AllocCount: 777
-      TotalSize: 888
-  - Callstack:
-    - {Function: 0x300, LineOffset: 33, Column: 30, Inline: false}
-    - {Function: 0x400, LineOffset: 44, Column: 40, Inline: true}
-    MemInfoBlock:
-      AllocCount: 666
-      TotalSize: 555
-  CallSites:
-  - - {Function: 0x500, LineOffset: 55, Column: 50, Inline: true}
-    - {Function: 0x600, LineOffset: 66, Column: 60, Inline: false}
-  - - {Function: 0x700, LineOffset: 77, Column: 70, Inline: true}
-    - {Function: 0x800, LineOffset: 88, Column: 80, Inline: false}
-)YAML";
-
-  llvm::memprof::YAMLMemProfReader YAMLReader;
-  YAMLReader.parse(YAMLData);
-  llvm::memprof::IndexedMemProfData MemProfData = YAMLReader.takeMemProfData();
-
-  Frame F1(0x100, 11, 10, true);
-  Frame F2(0x200, 22, 20, false);
-  Frame F3(0x300, 33, 30, false);
-  Frame F4(0x400, 44, 40, true);
-  Frame F5(0x500, 55, 50, true);
-  Frame F6(0x600, 66, 60, false);
-  Frame F7(0x700, 77, 70, true);
-  Frame F8(0x800, 88, 80, false);
-
-  llvm::SmallVector<FrameId> CS1 = {F1.hash(), F2.hash()};
-  llvm::SmallVector<FrameId> CS2 = {F3.hash(), F4.hash()};
-  llvm::SmallVector<FrameId> CS3 = {F5.hash(), F6.hash()};
-  llvm::SmallVector<FrameId> CS4 = {F7.hash(), F8.hash()};
-
-  // Verify the entire contents of MemProfData.Frames.
-  EXPECT_THAT(MemProfData.Frames,
-              UnorderedElementsAre(Pair(F1.hash(), F1), Pair(F2.hash(), F2),
-                                   Pair(F3.hash(), F3), Pair(F4.hash(), F4),
-                                   Pair(F5.hash(), F5), Pair(F6.hash(), F6),
-                                   Pair(F7.hash(), F7), Pair(F8.hash(), F8)));
-
-  // Verify the entire contents of MemProfData.Frames.
-  EXPECT_THAT(MemProfData.CallStacks,
-              UnorderedElementsAre(Pair(hashCallStack(CS1), CS1),
-                                   Pair(hashCallStack(CS2), CS2),
-                                   Pair(hashCallStack(CS3), CS3),
-                                   Pair(hashCallStack(CS4), CS4)));
-
-  // Verify the entire contents of MemProfData.Records.
-  ASSERT_THAT(MemProfData.Records, SizeIs(1));
-  const auto &[GUID, Record] = *MemProfData.Records.begin();
-  EXPECT_EQ(GUID, 0xdeadbeef12345678ULL);
-  ASSERT_THAT(Record.AllocSites, SizeIs(2));
-  EXPECT_EQ(Record.AllocSites[0].CSId, hashCallStack(CS1));
-  EXPECT_EQ(Record.AllocSites[0].Info.getAllocCount(), 777U);
-  EXPECT_EQ(Record.AllocSites[0].Info.getTotalSize(), 888U);
-  EXPECT_EQ(Record.AllocSites[1].CSId, hashCallStack(CS2));
-  EXPECT_EQ(Record.AllocSites[1].Info.getAllocCount(), 666U);
-  EXPECT_EQ(Record.AllocSites[1].Info.getTotalSize(), 555U);
-  EXPECT_THAT(Record.CallSiteIds,
-              ElementsAre(hashCallStack(CS3), hashCallStack(CS4)));
-}
 } // namespace