diff --git a/llvm/include/llvm/ProfileData/MemProf.h b/llvm/include/llvm/ProfileData/MemProf.h
index 6ffead4f13aeb..fe017913f6de2 100644
--- a/llvm/include/llvm/ProfileData/MemProf.h
+++ b/llvm/include/llvm/ProfileData/MemProf.h
@@ -12,6 +12,7 @@
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/EndianStream.h"
 #include "llvm/Support/HashBuilder.h"
+#include "llvm/Support/YAMLTraits.h"
 #include "llvm/Support/raw_ostream.h"
 
 #include <bitset>
@@ -1145,6 +1146,95 @@ template <typename FrameIdTy> class CallStackRadixTreeBuilder {
   }
 };
 } // namespace memprof
+
+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>);
+
+    // MSVC issues unused variable warnings despite the uses in static_assert
+    // above.
+    (void)Function;
+    (void)SymbolName;
+    (void)LineOffset;
+    (void)Column;
+    (void)IsInlineFrame;
+  }
+};
+
+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.
+    //
+    // We set MIB.Name via a temporary variable because ScalarTraits<uintptr_t>
+    // isn't available on macOS.
+#define MIBEntryDef(NameTag, Name, Type)                                       \
+  if (KeyStr == #Name) {                                                       \
+    uint64_t Value;                                                            \
+    Io.mapRequired(KeyStr.str().c_str(), Value);                               \
+    MIB.Name = static_cast<Type>(Value);                                       \
+    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)
+
 #endif // LLVM_PROFILEDATA_MEMPROF_H_
diff --git a/llvm/lib/ProfileData/MemProfReader.cpp b/llvm/lib/ProfileData/MemProfReader.cpp
index 1b8a9d3b7cb1d..fdb8e596b0dd3 100644
--- a/llvm/lib/ProfileData/MemProfReader.cpp
+++ b/llvm/lib/ProfileData/MemProfReader.cpp
@@ -41,97 +41,6 @@
 
 #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>);
-
-    // MSVC issues unused variable warnings despite the uses in static_assert
-    // above.
-    (void)Function;
-    (void)SymbolName;
-    (void)LineOffset;
-    (void)Column;
-    (void)IsInlineFrame;
-  }
-};
-
-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.
-    //
-    // We set MIB.Name via a temporary variable because ScalarTraits<uintptr_t>
-    // isn't available on macOS.
-#define MIBEntryDef(NameTag, Name, Type)                                       \
-  if (KeyStr == #Name) {                                                       \
-    uint64_t Value;                                                            \
-    Io.mapRequired(KeyStr.str().c_str(), Value);                               \
-    MIB.Name = static_cast<Type>(Value);                                       \
-    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 {