[clang] [IRPGO][ValueProfile] Instrument virtual table address that could be used to do virtual table address comparision for indirect-call-promotion. (PR #66825)

Mingming Liu via cfe-commits cfe-commits at lists.llvm.org
Tue Sep 19 14:30:31 PDT 2023


https://github.com/minglotus-6 created https://github.com/llvm/llvm-project/pull/66825

The changes include:
1) Insert value profile intrinsics and lowering them.
   - Introduced INSTR_PROF_VTABLE_DATA to record per-vtable data.
   - Modified LLVM_PROF_RAW_HEADER to record the metadata for vtable profiles.
   - Test case in llvm/test/Transforms/PGOProfile/vtable_profile.ll 2) Tooling support in llvm-profdata to show the added vtable information
   - Changes are made in {raw,text,indexed} prof reader and/or writer to read/write vtable profile data.
   - Test cases added in llvm/test/tools/llvm-profdata

>From 67e78ec0ac7cf3395bade6f6c96cde0fbcd57711 Mon Sep 17 00:00:00 2001
From: Mingming Liu <mingmingl at google.com>
Date: Sat, 16 Sep 2023 23:15:15 -0700
Subject: [PATCH] [IRPGO][ValueProfile] Instrument virtual table address that
 could be used to do virtual table address comparision for
 indirect-call-promotion.

The changes include:
1) Insert value profile intrinsics and lowering them.
   - Introduced INSTR_PROF_VTABLE_DATA to record per-vtable data.
   - Modified LLVM_PROF_RAW_HEADER to record the metadata for vtable profiles.
   - Test case in llvm/test/Transforms/PGOProfile/vtable_profile.ll
2) Tooling support in llvm-profdata to show the added vtable information
   - Changes are made in {raw,text,indexed} prof reader and/or writer to read/write vtable profile data.
   - Test cases added in llvm/test/tools/llvm-profdata
---
 .../CodeGen/coverage-profile-raw-version.c    |   4 +-
 compiler-rt/include/profile/InstrProfData.inc |  32 +++-
 compiler-rt/lib/profile/InstrProfiling.h      |  20 +-
 .../lib/profile/InstrProfilingBuffer.c        |  60 +++++-
 .../lib/profile/InstrProfilingInternal.h      |  11 +-
 compiler-rt/lib/profile/InstrProfilingMerge.c |  20 +-
 .../lib/profile/InstrProfilingPlatformLinux.c |  20 ++
 .../lib/profile/InstrProfilingWriter.c        |  45 ++++-
 .../Linux/instrprof-value-prof-warn.test      |   2 +-
 .../profile/instrprof-write-buffer-internal.c |  10 +-
 .../llvm/Analysis/IndirectCallVisitor.h       |  22 ++-
 llvm/include/llvm/ProfileData/InstrProf.h     | 125 ++++++++++++-
 .../llvm/ProfileData/InstrProfData.inc        |  31 +++-
 .../llvm/ProfileData/InstrProfReader.h        |  59 +++++-
 .../llvm/ProfileData/InstrProfWriter.h        |   4 +
 .../Instrumentation/InstrProfiling.h          |  12 ++
 llvm/lib/ProfileData/InstrProf.cpp            | 172 +++++++++++++++---
 llvm/lib/ProfileData/InstrProfReader.cpp      |  79 +++++++-
 llvm/lib/ProfileData/InstrProfWriter.cpp      |  92 +++++++++-
 .../Instrumentation/InstrProfiling.cpp        | 165 +++++++++++++++++
 .../Instrumentation/PGOInstrumentation.cpp    |   1 +
 .../Instrumentation/ValueProfilePlugins.inc   |  26 ++-
 .../Inputs/update_vtable_value_prof_inputs.sh |  84 +++++++++
 .../Transforms/PGOProfile/comdat_internal.ll  |   4 +-
 .../indirect_call_profile_funclet.ll          |   5 +-
 .../Transforms/PGOProfile/vtable_profile.ll   | 139 ++++++++++++++
 .../llvm-profdata/Inputs/c-general.profraw    | Bin 1800 -> 1912 bytes
 .../llvm-profdata/Inputs/vtable-prof.proftext |  73 ++++++++
 .../llvm-profdata/Inputs/vtable_prof.profraw  | Bin 0 -> 816 bytes
 .../llvm-profdata/binary-ids-padding.test     |  10 +-
 .../llvm-profdata/large-binary-id-size.test   |   4 +-
 ...alformed-not-space-for-another-header.test |   7 +-
 .../malformed-num-counters-zero.test          |   7 +-
 .../malformed-ptr-to-counter-array.test       |   7 +-
 .../misaligned-binary-ids-size.test           |   4 +-
 .../mismatched-raw-profile-header.test        |   2 +
 .../tools/llvm-profdata/raw-32-bits-be.test   |   7 +-
 .../tools/llvm-profdata/raw-32-bits-le.test   |   6 +-
 .../tools/llvm-profdata/raw-64-bits-be.test   |  13 +-
 .../tools/llvm-profdata/raw-64-bits-le.test   |  29 ++-
 .../tools/llvm-profdata/raw-two-profiles.test |  10 +-
 .../tools/llvm-profdata/vtable-prof.proftext  |  16 ++
 .../vtable-value-prof-basic.test              | 100 ++++++++++
 llvm/tools/llvm-profdata/llvm-profdata.cpp    |  37 +++-
 44 files changed, 1474 insertions(+), 102 deletions(-)
 create mode 100644 llvm/test/Transforms/PGOProfile/Inputs/update_vtable_value_prof_inputs.sh
 create mode 100644 llvm/test/Transforms/PGOProfile/vtable_profile.ll
 create mode 100644 llvm/test/tools/llvm-profdata/Inputs/vtable-prof.proftext
 create mode 100644 llvm/test/tools/llvm-profdata/Inputs/vtable_prof.profraw
 create mode 100644 llvm/test/tools/llvm-profdata/vtable-prof.proftext
 create mode 100644 llvm/test/tools/llvm-profdata/vtable-value-prof-basic.test

diff --git a/clang/test/CodeGen/coverage-profile-raw-version.c b/clang/test/CodeGen/coverage-profile-raw-version.c
index 749dce50298f025..bb30fd8c1c70ae7 100644
--- a/clang/test/CodeGen/coverage-profile-raw-version.c
+++ b/clang/test/CodeGen/coverage-profile-raw-version.c
@@ -1,8 +1,8 @@
 // RUN: %clang_cc1 -debug-info-kind=standalone -fprofile-instrument=clang -fcoverage-mapping -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -debug-info-kind=standalone -mllvm -debug-info-correlate -fprofile-instrument=clang -fcoverage-mapping -emit-llvm -o - %s | FileCheck %s --check-prefix=DEBUG_INFO
 
-// CHECK: @__llvm_profile_raw_version = {{.*}}constant i64 8
-// DEBUG_INFO: @__llvm_profile_raw_version = {{.*}}constant i64 576460752303423496
+// CHECK: @__llvm_profile_raw_version = {{.*}}constant i64 9
+// DEBUG_INFO: @__llvm_profile_raw_version = {{.*}}constant i64 576460752303423497
 
 int main() {
     return 0;
diff --git a/compiler-rt/include/profile/InstrProfData.inc b/compiler-rt/include/profile/InstrProfData.inc
index 4456bf1ab176325..b49f9d983e0f46d 100644
--- a/compiler-rt/include/profile/InstrProfData.inc
+++ b/compiler-rt/include/profile/InstrProfData.inc
@@ -92,6 +92,19 @@ INSTR_PROF_DATA(const uint16_t, Int16ArrayTy, NumValueSites[IPVK_Last+1], \
 /* INSTR_PROF_DATA end. */
 
 
+#ifndef INSTR_PROF_VTABLE_DATA
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Initializer)
+#else
+#define INSTR_PROF_VTABLE_DATA_DEFINED
+#endif
+INSTR_PROF_VTABLE_DATA(const uint64_t, llvm::Type::getInt64Ty(Ctx), VTableNameHash, \
+                      ConstantInt::get(llvm::Type::getInt64Ty(Ctx), IndexedInstrProf::ComputeHash(VTableName)))
+INSTR_PROF_VTABLE_DATA(const IntPtrT, llvm::Type::getInt8PtrTy(Ctx), VTablePointer, VTableAddr)
+INSTR_PROF_VTABLE_DATA(const uint32_t, llvm::Type::getInt32Ty(Ctx), VTableSize, \
+                      ConstantInt::get(llvm::Type::getInt32Ty(Ctx), VTableSizeVal))
+#undef INSTR_PROF_VTABLE_DATA
+/* INSTR_PROF_VTABLE_DATA end. */
+
 /* This is an internal data structure used by value profiler. It
  * is defined here to allow serialization code sharing by LLVM
  * to be used in unit test.
@@ -136,6 +149,8 @@ INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta,
                       (uintptr_t)CountersBegin - (uintptr_t)DataBegin)
 INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 #undef INSTR_PROF_RAW_HEADER
 /* INSTR_PROF_RAW_HEADER  end */
@@ -177,13 +192,14 @@ VALUE_PROF_FUNC_PARAM(uint32_t, CounterIndex, Type::getInt32Ty(Ctx))
 VALUE_PROF_KIND(IPVK_IndirectCallTarget, 0, "indirect call target")
 /* For memory intrinsic functions size profiling. */
 VALUE_PROF_KIND(IPVK_MemOPSize, 1, "memory intrinsic functions size")
+VALUE_PROF_KIND(IPVK_VTableTarget, 2, "vtable target")
 /* These two kinds must be the last to be
  * declared. This is to make sure the string
  * array created with the template can be
  * indexed with the kind value.
  */
 VALUE_PROF_KIND(IPVK_First, IPVK_IndirectCallTarget, "first")
-VALUE_PROF_KIND(IPVK_Last, IPVK_MemOPSize, "last")
+VALUE_PROF_KIND(IPVK_Last, IPVK_VTableTarget, "last")
 
 #undef VALUE_PROF_KIND
 /* VALUE_PROF_KIND end */
@@ -270,12 +286,18 @@ INSTR_PROF_SECT_ENTRY(IPSK_cnts, \
 INSTR_PROF_SECT_ENTRY(IPSK_name, \
                       INSTR_PROF_QUOTE(INSTR_PROF_NAME_COMMON), \
                       INSTR_PROF_NAME_COFF, "__DATA,")
+INSTR_PROF_SECT_ENTRY(IPSK_vname, \
+                      INSTR_PROF_QUOTE(INSTR_PROF_VNAME_COMMON), \
+                      INSTR_PROF_VNAME_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_vals, \
                       INSTR_PROF_QUOTE(INSTR_PROF_VALS_COMMON), \
                       INSTR_PROF_VALS_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_vnodes, \
                       INSTR_PROF_QUOTE(INSTR_PROF_VNODES_COMMON), \
                       INSTR_PROF_VNODES_COFF, "__DATA,")
+INSTR_PROF_SECT_ENTRY(IPSK_vtab, \
+                      INSTR_PROF_QUOTE(INSTR_PROF_VTAB_COMMON), \
+                      INSTR_PROF_VTAB_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_covmap, \
                       INSTR_PROF_QUOTE(INSTR_PROF_COVMAP_COMMON), \
                       INSTR_PROF_COVMAP_COFF, "__LLVM_COV,")
@@ -646,9 +668,9 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
 
 /* FIXME: Please remedy the fixme in the header before bumping the version. */
 /* Raw profile format version (start from 1). */
-#define INSTR_PROF_RAW_VERSION 8
+#define INSTR_PROF_RAW_VERSION 9
 /* Indexed profile format version (start from 1). */
-#define INSTR_PROF_INDEX_VERSION 10
+#define INSTR_PROF_INDEX_VERSION 11
 /* Coverage mapping format version (start from 0). */
 #define INSTR_PROF_COVMAP_VERSION 5
 
@@ -686,9 +708,11 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
    than WIN32 */
 #define INSTR_PROF_DATA_COMMON __llvm_prf_data
 #define INSTR_PROF_NAME_COMMON __llvm_prf_names
+#define INSTR_PROF_VNAME_COMMON __llvm_prf_vnames
 #define INSTR_PROF_CNTS_COMMON __llvm_prf_cnts
 #define INSTR_PROF_VALS_COMMON __llvm_prf_vals
 #define INSTR_PROF_VNODES_COMMON __llvm_prf_vnds
+#define INSTR_PROF_VTAB_COMMON __llvm_prf_vtab
 #define INSTR_PROF_COVMAP_COMMON __llvm_covmap
 #define INSTR_PROF_COVFUN_COMMON __llvm_covfun
 #define INSTR_PROF_ORDERFILE_COMMON __llvm_orderfile
@@ -697,9 +721,11 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
  */
 #define INSTR_PROF_DATA_COFF ".lprfd$M"
 #define INSTR_PROF_NAME_COFF ".lprfn$M"
+#define INSTR_PROF_VNAME_COFF ".lprfn$M"
 #define INSTR_PROF_CNTS_COFF ".lprfc$M"
 #define INSTR_PROF_VALS_COFF ".lprfv$M"
 #define INSTR_PROF_VNODES_COFF ".lprfnd$M"
+#define INSTR_PROF_VTAB_COFF ".lprfvt$M"
 #define INSTR_PROF_COVMAP_COFF ".lcovmap$M"
 #define INSTR_PROF_COVFUN_COFF ".lcovfun$M"
 #define INSTR_PROF_ORDERFILE_COFF ".lorderfile$M"
diff --git a/compiler-rt/lib/profile/InstrProfiling.h b/compiler-rt/lib/profile/InstrProfiling.h
index 4433d7bd48871fc..f3afa694e02c27d 100644
--- a/compiler-rt/lib/profile/InstrProfiling.h
+++ b/compiler-rt/lib/profile/InstrProfiling.h
@@ -38,6 +38,12 @@ typedef struct ValueProfNode {
 #include "profile/InstrProfData.inc"
 } ValueProfNode;
 
+typedef void *IntPtrT;
+typedef struct VTableProfData {
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Initializer) Type Name;
+#include "profile/InstrProfData.inc"
+} VTableProfData;
+
 /*!
  * \brief Return 1 if profile counters are continuously synced to the raw
  * profile via an mmap(). This is in contrast to the default mode, in which
@@ -86,10 +92,14 @@ const __llvm_profile_data *__llvm_profile_begin_data(void);
 const __llvm_profile_data *__llvm_profile_end_data(void);
 const char *__llvm_profile_begin_names(void);
 const char *__llvm_profile_end_names(void);
+const char *__llvm_profile_begin_vnames(void);
+const char *__llvm_profile_end_vnames(void);
 char *__llvm_profile_begin_counters(void);
 char *__llvm_profile_end_counters(void);
 ValueProfNode *__llvm_profile_begin_vnodes();
 ValueProfNode *__llvm_profile_end_vnodes();
+VTableProfData *__llvm_profile_begin_vtables();
+VTableProfData *__llvm_profile_end_vtables();
 uint32_t *__llvm_profile_begin_orderfile();
 
 /*!
@@ -276,6 +286,12 @@ uint64_t __llvm_profile_get_num_counters(const char *Begin, const char *End);
 /*! \brief Get the size of the profile counters section in bytes. */
 uint64_t __llvm_profile_get_counters_size(const char *Begin, const char *End);
 
+uint64_t __llvm_profile_get_num_vtable(const VTableProfData *Begin,
+                                       const VTableProfData *End);
+
+uint64_t __llvm_profile_get_vtable_size(const VTableProfData *Begin,
+                                        const VTableProfData *End);
+
 /* ! \brief Given the sizes of the data and counter information, return the
  * number of padding bytes before and after the counters, and after the names,
  * in the raw profile.
@@ -287,8 +303,10 @@ uint64_t __llvm_profile_get_counters_size(const char *Begin, const char *End);
  */
 void __llvm_profile_get_padding_sizes_for_counters(
     uint64_t DataSize, uint64_t CountersSize, uint64_t NamesSize,
+    uint64_t VTableSize, uint64_t VNameSize,
     uint64_t *PaddingBytesBeforeCounters, uint64_t *PaddingBytesAfterCounters,
-    uint64_t *PaddingBytesAfterNames);
+    uint64_t *PaddingBytesAfterNames, uint64_t *PaddingBytesAfterVTable,
+    uint64_t *PaddingBytesAfterVNames);
 
 /*!
  * \brief Set the flag that profile data has been dumped to the file.
diff --git a/compiler-rt/lib/profile/InstrProfilingBuffer.c b/compiler-rt/lib/profile/InstrProfilingBuffer.c
index 61ac5d9c0285002..0c36e40444c7344 100644
--- a/compiler-rt/lib/profile/InstrProfilingBuffer.c
+++ b/compiler-rt/lib/profile/InstrProfilingBuffer.c
@@ -9,6 +9,8 @@
 // Note: This is linked into the Darwin kernel, and must remain compatible
 // with freestanding compilation. See `darwin_add_builtin_libraries`.
 
+#include <assert.h>
+
 #include "InstrProfiling.h"
 #include "InstrProfilingInternal.h"
 #include "InstrProfilingPort.h"
@@ -45,9 +47,14 @@ uint64_t __llvm_profile_get_size_for_buffer(void) {
   const char *CountersEnd = __llvm_profile_end_counters();
   const char *NamesBegin = __llvm_profile_begin_names();
   const char *NamesEnd = __llvm_profile_end_names();
+  const VTableProfData *VTableBegin = __llvm_profile_begin_vtables();
+  const VTableProfData *VTableEnd = __llvm_profile_end_vtables();
+  const char *VNamesBegin = __llvm_profile_begin_vnames();
+  const char *VNamesEnd = __llvm_profile_end_vnames();
 
   return __llvm_profile_get_size_for_buffer_internal(
-      DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd);
+      DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd,
+      VTableBegin, VTableEnd, VNamesBegin, VNamesEnd);
 }
 
 COMPILER_RT_VISIBILITY
@@ -63,6 +70,18 @@ uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
                                       const __llvm_profile_data *End) {
   return __llvm_profile_get_num_data(Begin, End) * sizeof(__llvm_profile_data);
 }
+COMPILER_RT_VISIBILITY
+uint64_t __llvm_profile_get_num_vtable(const VTableProfData *Begin,
+                                       const VTableProfData *End) {
+  intptr_t EndI = (intptr_t)End, BeginI = (intptr_t)Begin;
+  return (EndI + sizeof(VTableProfData) - 1 - BeginI) / sizeof(VTableProfData);
+}
+
+COMPILER_RT_VISIBILITY
+uint64_t __llvm_profile_get_vtable_size(const VTableProfData *Begin,
+                                        const VTableProfData *End) {
+  return __llvm_profile_get_num_vtable(Begin, End) * sizeof(VTableProfData);
+}
 
 COMPILER_RT_VISIBILITY size_t __llvm_profile_counter_entry_size(void) {
   if (__llvm_profile_get_version() & VARIANT_MASK_BYTE_COVERAGE)
@@ -103,46 +122,68 @@ static int needsCounterPadding(void) {
 COMPILER_RT_VISIBILITY
 void __llvm_profile_get_padding_sizes_for_counters(
     uint64_t DataSize, uint64_t CountersSize, uint64_t NamesSize,
+    uint64_t VTableSize, uint64_t VNameSize,
     uint64_t *PaddingBytesBeforeCounters, uint64_t *PaddingBytesAfterCounters,
-    uint64_t *PaddingBytesAfterNames) {
+    uint64_t *PaddingBytesAfterNames, uint64_t *PaddingBytesAfterVTable,
+    uint64_t *PaddingBytesAfterVName) {
+  // Counter padding is needed only if continuous mode is enabled.
   if (!needsCounterPadding()) {
     *PaddingBytesBeforeCounters = 0;
     *PaddingBytesAfterCounters =
         __llvm_profile_get_num_padding_bytes(CountersSize);
     *PaddingBytesAfterNames = __llvm_profile_get_num_padding_bytes(NamesSize);
+    *PaddingBytesAfterVTable = __llvm_profile_get_num_padding_bytes(VTableSize);
+    *PaddingBytesAfterVName = __llvm_profile_get_num_padding_bytes(VNameSize);
     return;
   }
 
+  // Value profiling not supported in continuous mode at profile-write time
+  // according to
+  // https://github.com/llvm/llvm-project/blob/e6a007f6b51a661ed3dd8b0210b734b3e9b4354f/compiler-rt/lib/profile/InstrProfilingWriter.c#L328
+  assert(VTableSize == 0 && VNameSize == 0 &&
+         "Value profile not supported for continuous mode");
   // In continuous mode, the file offsets for headers and for the start of
   // counter sections need to be page-aligned.
   *PaddingBytesBeforeCounters =
       calculateBytesNeededToPageAlign(sizeof(__llvm_profile_header) + DataSize);
   *PaddingBytesAfterCounters = calculateBytesNeededToPageAlign(CountersSize);
   *PaddingBytesAfterNames = calculateBytesNeededToPageAlign(NamesSize);
+  // Set these two variables to zero to avoid uninitialized variables
+  // even if VTableSize and VNameSize are asserted to be zero.
+  *PaddingBytesAfterVTable = 0;
+  *PaddingBytesAfterVName = 0;
 }
 
 COMPILER_RT_VISIBILITY
 uint64_t __llvm_profile_get_size_for_buffer_internal(
     const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
     const char *CountersBegin, const char *CountersEnd, const char *NamesBegin,
-    const char *NamesEnd) {
+    const char *NamesEnd, const VTableProfData *VTableBegin,
+    const VTableProfData *VTableEnd, const char *VNamesBegin,
+    const char *VNamesEnd) {
   /* Match logic in __llvm_profile_write_buffer(). */
   const uint64_t NamesSize = (NamesEnd - NamesBegin) * sizeof(char);
   uint64_t DataSize = __llvm_profile_get_data_size(DataBegin, DataEnd);
   uint64_t CountersSize =
       __llvm_profile_get_counters_size(CountersBegin, CountersEnd);
+  uint64_t VTableSize = __llvm_profile_get_vtable_size(VTableBegin, VTableEnd);
+  uint64_t VNameSize = (VNamesEnd - VNamesBegin) * sizeof(char);
 
   /* Determine how much padding is needed before/after the counters and after
    * the names. */
   uint64_t PaddingBytesBeforeCounters, PaddingBytesAfterCounters,
-      PaddingBytesAfterNames;
+      PaddingBytesAfterNames, PaddingBytesAfterVTable, PaddingBytesAfterVNames;
   __llvm_profile_get_padding_sizes_for_counters(
-      DataSize, CountersSize, NamesSize, &PaddingBytesBeforeCounters,
-      &PaddingBytesAfterCounters, &PaddingBytesAfterNames);
+      DataSize, CountersSize, NamesSize, VTableSize, VNameSize,
+      &PaddingBytesBeforeCounters, &PaddingBytesAfterCounters,
+      &PaddingBytesAfterNames, &PaddingBytesAfterVTable,
+      &PaddingBytesAfterVNames);
 
   return sizeof(__llvm_profile_header) + __llvm_write_binary_ids(NULL) +
          DataSize + PaddingBytesBeforeCounters + CountersSize +
-         PaddingBytesAfterCounters + NamesSize + PaddingBytesAfterNames;
+         PaddingBytesAfterCounters + NamesSize + PaddingBytesAfterNames +
+         VTableSize + PaddingBytesAfterVTable + VNameSize +
+         PaddingBytesAfterVNames;
 }
 
 COMPILER_RT_VISIBILITY
@@ -163,6 +204,9 @@ COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer_internal(
     const char *CountersEnd, const char *NamesBegin, const char *NamesEnd) {
   ProfDataWriter BufferWriter;
   initBufferWriter(&BufferWriter, Buffer);
+  // Set virtual table arguments to NULL since they are not supported yet.
   return lprofWriteDataImpl(&BufferWriter, DataBegin, DataEnd, CountersBegin,
-                            CountersEnd, 0, NamesBegin, NamesEnd, 0);
+                            CountersEnd, 0, NamesBegin, NamesEnd,
+                            NULL /* VTableBegin */, NULL /* VTableEnd */,
+                            NULL /* VNamesBegin */, NULL /* VNamesEnd */, 0);
 }
diff --git a/compiler-rt/lib/profile/InstrProfilingInternal.h b/compiler-rt/lib/profile/InstrProfilingInternal.h
index 360165e32ab3fe2..bce333f933f0ffe 100644
--- a/compiler-rt/lib/profile/InstrProfilingInternal.h
+++ b/compiler-rt/lib/profile/InstrProfilingInternal.h
@@ -18,11 +18,16 @@
  * pointers to the live data in memory.  This function is probably not what you
  * want.  Use __llvm_profile_get_size_for_buffer instead.  Use this function if
  * your program has a custom memory layout.
+ * NOTE: The change of function signature requires modifying c source code
+ * as demonstrated by the existing tests. If this is causing backward
+ * compatible issues, considering adding another function for new use cases.
  */
 uint64_t __llvm_profile_get_size_for_buffer_internal(
     const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
     const char *CountersBegin, const char *CountersEnd, const char *NamesBegin,
-    const char *NamesEnd);
+    const char *NamesEnd, const VTableProfData *VTableBegin,
+    const VTableProfData *VTableEnd, const char *VNamesBegin,
+    const char *VNamesEnd);
 
 /*!
  * \brief Write instrumentation data to the given buffer, given explicit
@@ -154,7 +159,9 @@ int lprofWriteDataImpl(ProfDataWriter *Writer,
                        const __llvm_profile_data *DataEnd,
                        const char *CountersBegin, const char *CountersEnd,
                        VPDataReaderType *VPDataReader, const char *NamesBegin,
-                       const char *NamesEnd, int SkipNameDataWrite);
+                       const char *NamesEnd, const VTableProfData *VTableBegin,
+                       const VTableProfData *VTableEnd, const char *VNamesBegin,
+                       const char *VNamesEnd, int SkipNameDataWrite);
 
 /* Merge value profile data pointed to by SrcValueProfData into
  * in-memory profile counters pointed by to DstData.  */
diff --git a/compiler-rt/lib/profile/InstrProfilingMerge.c b/compiler-rt/lib/profile/InstrProfilingMerge.c
index 9cf12f251f7262d..2ef6227599ff139 100644
--- a/compiler-rt/lib/profile/InstrProfilingMerge.c
+++ b/compiler-rt/lib/profile/InstrProfilingMerge.c
@@ -124,9 +124,27 @@ int __llvm_profile_merge_from_buffer(const char *ProfileData,
   SrcCountersEnd = SrcCountersStart +
                    Header->NumCounters * __llvm_profile_counter_entry_size();
   SrcNameStart = SrcCountersEnd;
-  SrcValueProfDataStart =
+  // This is to assume counter size is a multiple of 8 bytes.
+  // uint64_t NamesSize = Header->NamesSize;
+  // uint64_t PaddingBytesAfterNames =
+  //    __llvm_profile_get_num_padding_bytes(Header->NamesSize);
+  // First, skip rather than merge them
+  uint64_t VTableSectionSize = Header->NumVTables * sizeof(VTableProfData);
+  uint64_t PaddingBytesAfterVTableSection =
+      __llvm_profile_get_num_padding_bytes(VTableSectionSize);
+  uint64_t VNamesSize = Header->VNamesSize;
+  uint64_t PaddingBytesAfterVNamesSize =
+      __llvm_profile_get_num_padding_bytes(VNamesSize);
+
+  uint64_t VTableProfDataOffset =
       SrcNameStart + Header->NamesSize +
       __llvm_profile_get_num_padding_bytes(Header->NamesSize);
+
+  uint64_t VTableNamesOffset =
+      VTableProfDataOffset + VTableSectionSize + PaddingBytesAfterVTableSection;
+
+  SrcValueProfDataStart =
+      VTableNamesOffset + VNamesSize + PaddingBytesAfterVNamesSize;
   if (SrcNameStart < SrcCountersStart)
     return 1;
 
diff --git a/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c b/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
index 2cce0a4b2c48d35..dc861632271ce79 100644
--- a/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
+++ b/compiler-rt/lib/profile/InstrProfilingPlatformLinux.c
@@ -33,8 +33,12 @@
 #define PROF_DATA_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_DATA_COMMON)
 #define PROF_NAME_START INSTR_PROF_SECT_START(INSTR_PROF_NAME_COMMON)
 #define PROF_NAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_NAME_COMMON)
+#define PROF_VNAME_START INSTR_PROF_SECT_START(INSTR_PROF_VNAME_COMMON)
+#define PROF_VNAME_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNAME_COMMON)
 #define PROF_CNTS_START INSTR_PROF_SECT_START(INSTR_PROF_CNTS_COMMON)
 #define PROF_CNTS_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_CNTS_COMMON)
+#define PROF_VTABLE_START INSTR_PROF_SECT_START(INSTR_PROF_VTAB_COMMON)
+#define PROF_VTABLE_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VTAB_COMMON)
 #define PROF_ORDERFILE_START INSTR_PROF_SECT_START(INSTR_PROF_ORDERFILE_COMMON)
 #define PROF_VNODES_START INSTR_PROF_SECT_START(INSTR_PROF_VNODES_COMMON)
 #define PROF_VNODES_STOP INSTR_PROF_SECT_STOP(INSTR_PROF_VNODES_COMMON)
@@ -48,6 +52,10 @@ extern __llvm_profile_data PROF_DATA_STOP COMPILER_RT_VISIBILITY
     COMPILER_RT_WEAK;
 extern char PROF_CNTS_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
 extern char PROF_CNTS_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
+extern VTableProfData PROF_VTABLE_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
+extern VTableProfData PROF_VTABLE_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
+extern char PROF_VNAME_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
+extern char PROF_VNAME_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
 extern uint32_t PROF_ORDERFILE_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
 extern char PROF_NAME_START COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
 extern char PROF_NAME_STOP COMPILER_RT_VISIBILITY COMPILER_RT_WEAK;
@@ -68,6 +76,18 @@ COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_names(void) {
 COMPILER_RT_VISIBILITY const char *__llvm_profile_end_names(void) {
   return &PROF_NAME_STOP;
 }
+COMPILER_RT_VISIBILITY const char *__llvm_profile_begin_vnames(void) {
+  return &PROF_VNAME_START;
+}
+COMPILER_RT_VISIBILITY const char *__llvm_profile_end_vnames(void) {
+  return &PROF_VNAME_STOP;
+}
+COMPILER_RT_VISIBILITY VTableProfData *__llvm_profile_begin_vtables(void) {
+  return &PROF_VTABLE_START;
+}
+COMPILER_RT_VISIBILITY VTableProfData *__llvm_profile_end_vtables(void) {
+  return &PROF_VTABLE_STOP;
+}
 COMPILER_RT_VISIBILITY char *__llvm_profile_begin_counters(void) {
   return &PROF_CNTS_START;
 }
diff --git a/compiler-rt/lib/profile/InstrProfilingWriter.c b/compiler-rt/lib/profile/InstrProfilingWriter.c
index 1e22398a4c0f64a..ed5dbdb6ee4383f 100644
--- a/compiler-rt/lib/profile/InstrProfilingWriter.c
+++ b/compiler-rt/lib/profile/InstrProfilingWriter.c
@@ -248,8 +248,13 @@ COMPILER_RT_VISIBILITY int lprofWriteData(ProfDataWriter *Writer,
   const char *CountersEnd = __llvm_profile_end_counters();
   const char *NamesBegin = __llvm_profile_begin_names();
   const char *NamesEnd = __llvm_profile_end_names();
+  const VTableProfData *VTableBegin = __llvm_profile_begin_vtables();
+  const VTableProfData *VTableEnd = __llvm_profile_end_vtables();
+  const char *VNamesBegin = __llvm_profile_begin_vnames();
+  const char *VNamesEnd = __llvm_profile_end_vnames();
   return lprofWriteDataImpl(Writer, DataBegin, DataEnd, CountersBegin,
                             CountersEnd, VPDataReader, NamesBegin, NamesEnd,
+                            VTableBegin, VTableEnd, VNamesBegin, VNamesEnd,
                             SkipNameDataWrite);
 }
 
@@ -258,7 +263,9 @@ lprofWriteDataImpl(ProfDataWriter *Writer, const __llvm_profile_data *DataBegin,
                    const __llvm_profile_data *DataEnd,
                    const char *CountersBegin, const char *CountersEnd,
                    VPDataReaderType *VPDataReader, const char *NamesBegin,
-                   const char *NamesEnd, int SkipNameDataWrite) {
+                   const char *NamesEnd, const VTableProfData *VTableBegin,
+                   const VTableProfData *VTableEnd, const char *VNamesBegin,
+                   const char *VNamesEnd, int SkipNameDataWrite) {
   int DebugInfoCorrelate =
       (__llvm_profile_get_version() & VARIANT_MASK_DBG_CORRELATE) != 0ULL;
 
@@ -272,6 +279,13 @@ lprofWriteDataImpl(ProfDataWriter *Writer, const __llvm_profile_data *DataBegin,
   const uint64_t NumCounters =
       __llvm_profile_get_num_counters(CountersBegin, CountersEnd);
   const uint64_t NamesSize = DebugInfoCorrelate ? 0 : NamesEnd - NamesBegin;
+  const uint64_t NumVTables =
+      __llvm_profile_get_num_vtable(VTableBegin, VTableEnd);
+  const uint64_t VTableSectionSize =
+      __llvm_profile_get_vtable_size(VTableBegin, VTableEnd);
+  // Note, in reality, vtable profiling is not supported when DebugInfoCorrelate
+  // is true.
+  const uint64_t VNamesSize = DebugInfoCorrelate ? 0 : VNamesEnd - VNamesBegin;
 
   /* Create the header. */
   __llvm_profile_header Header;
@@ -279,11 +293,12 @@ lprofWriteDataImpl(ProfDataWriter *Writer, const __llvm_profile_data *DataBegin,
   /* Determine how much padding is needed before/after the counters and after
    * the names. */
   uint64_t PaddingBytesBeforeCounters, PaddingBytesAfterCounters,
-      PaddingBytesAfterNames;
+      PaddingBytesAfterNames, PaddingBytesAfterVTable, PaddingBytesAfterVNames;
   __llvm_profile_get_padding_sizes_for_counters(
-      DataSectionSize, CountersSectionSize, NamesSize,
-      &PaddingBytesBeforeCounters, &PaddingBytesAfterCounters,
-      &PaddingBytesAfterNames);
+      DataSectionSize, CountersSectionSize, NamesSize, VTableSectionSize,
+      VNamesSize, &PaddingBytesBeforeCounters, &PaddingBytesAfterCounters,
+      &PaddingBytesAfterNames, &PaddingBytesAfterVTable,
+      &PaddingBytesAfterVNames);
 
   {
 /* Initialize header structure.  */
@@ -305,13 +320,24 @@ lprofWriteDataImpl(ProfDataWriter *Writer, const __llvm_profile_data *DataBegin,
 
   /* Write the profile header. */
   ProfDataIOVec IOVec[] = {{&Header, sizeof(__llvm_profile_header), 1, 0}};
+  // printf("Size of profile header is %d\n",
+  // (int)(sizeof(__llvm_profile_header)));
   if (Writer->Write(Writer, IOVec, sizeof(IOVec) / sizeof(*IOVec)))
     return -1;
 
+  // printf("Completed profile header\n");
+
   /* Write the binary id lengths and data. */
-  if (__llvm_write_binary_ids(Writer) == -1)
+  int binary_id_size = __llvm_write_binary_ids(Writer);
+  if (binary_id_size == -1)
     return -1;
 
+  // Might be needed for debugging. Clean up before commit.
+  // uint64_t VTableProfDataOffset =
+  //    sizeof(__llvm_profile_header) + binary_id_size + DataSectionSize +
+  //    PaddingBytesBeforeCounters + CountersSectionSize +
+  //    PaddingBytesAfterCounters + NamesSize + PaddingBytesAfterNames;
+
   /* Write the profile data. */
   ProfDataIOVec IOVecData[] = {
       {DebugInfoCorrelate ? NULL : DataBegin, sizeof(uint8_t), DataSectionSize,
@@ -321,7 +347,12 @@ lprofWriteDataImpl(ProfDataWriter *Writer, const __llvm_profile_data *DataBegin,
       {NULL, sizeof(uint8_t), PaddingBytesAfterCounters, 1},
       {(SkipNameDataWrite || DebugInfoCorrelate) ? NULL : NamesBegin,
        sizeof(uint8_t), NamesSize, 0},
-      {NULL, sizeof(uint8_t), PaddingBytesAfterNames, 1}};
+      {NULL, sizeof(uint8_t), PaddingBytesAfterNames, 1},
+      {VTableBegin, sizeof(uint8_t), VTableSectionSize, 0},
+      {NULL, sizeof(uint8_t), PaddingBytesAfterVTable, 1},
+      {(SkipNameDataWrite || DebugInfoCorrelate) ? NULL : VNamesBegin,
+       sizeof(uint8_t), VNamesSize, 0},
+      {NULL, sizeof(uint8_t), PaddingBytesAfterVNames, 1}};
   if (Writer->Write(Writer, IOVecData, sizeof(IOVecData) / sizeof(*IOVecData)))
     return -1;
 
diff --git a/compiler-rt/test/profile/Linux/instrprof-value-prof-warn.test b/compiler-rt/test/profile/Linux/instrprof-value-prof-warn.test
index 991fd2b69b5b303..89787e79c20e9d1 100644
--- a/compiler-rt/test/profile/Linux/instrprof-value-prof-warn.test
+++ b/compiler-rt/test/profile/Linux/instrprof-value-prof-warn.test
@@ -1,7 +1,7 @@
 RUN: %clang_pgogen -O2 -fuse-ld=bfd -mllvm -disable-vp=false -mllvm -vp-static-alloc=true -DSTRESS=1 -o %t.ir.warn  %S/../Inputs/instrprof-value-prof-real.c
 RUN: env LLVM_PROFILE_FILE=%t.ir.profraw LLVM_VP_MAX_NUM_VALS_PER_SITE=255  %run %t.ir.warn 2>&1 |FileCheck --check-prefix=WARNING %s
 #  Test that enough static counters have been allocated
-RUN: env LLVM_PROFILE_FILE=%t.ir.profraw LLVM_VP_MAX_NUM_VALS_PER_SITE=130  %run %t.ir.warn 2>&1 |FileCheck --check-prefix=NOWARNING --allow-empty %s
+RUN: env LLVM_PROFILE_FILE=%t.ir.profraw LLVM_VP_MAX_NUM_VALS_PER_SITE=80  %run %t.ir.warn 2>&1 |FileCheck --check-prefix=NOWARNING --allow-empty %s
 
 # WARNING: LLVM Profile Warning:
 # NOWARNING-NOT: LLVM Profile Warning:
diff --git a/compiler-rt/test/profile/instrprof-write-buffer-internal.c b/compiler-rt/test/profile/instrprof-write-buffer-internal.c
index 7b96c6d91c33f5a..97dfff8d7fe71fb 100644
--- a/compiler-rt/test/profile/instrprof-write-buffer-internal.c
+++ b/compiler-rt/test/profile/instrprof-write-buffer-internal.c
@@ -28,7 +28,9 @@ char *__llvm_profile_end_counters(void);
 
 uint64_t __llvm_profile_get_size_for_buffer_internal(
     const void *DataBegin, const void *DataEnd, const char *CountersBegin,
-    const char *CountersEnd, const char *NamesBegin, const char *NamesEnd);
+    const char *CountersEnd, const char *NamesBegin, const char *NamesEnd,
+    const char *VTableBegin, const char *VTableEnd, const char *VNamesBegin,
+    const char *VNamesEnd);
 
 int __llvm_profile_write_buffer_internal(char *Buffer, const void *DataBegin,
                                          const void *DataEnd,
@@ -43,7 +45,11 @@ int main(int argc, const char *argv[]) {
   uint64_t bufsize = __llvm_profile_get_size_for_buffer_internal(
       __llvm_profile_begin_data(), __llvm_profile_end_data(),
       __llvm_profile_begin_counters(), __llvm_profile_end_counters(),
-      __llvm_profile_begin_names(), __llvm_profile_end_names());
+      __llvm_profile_begin_names(), __llvm_profile_end_names(), NULL, NULL,
+      NULL, NULL);
+
+  // printf("buffer size is %lld\n", bufsize);
+  //uint64_t aligned_bufsize = ((bufsize + 32) >> 6) << 6;
 
   char *buf = malloc(bufsize);
   int ret = __llvm_profile_write_buffer_internal(buf,
diff --git a/llvm/include/llvm/Analysis/IndirectCallVisitor.h b/llvm/include/llvm/Analysis/IndirectCallVisitor.h
index 0825e19ecd2d240..52d4ff04d3d4ecc 100644
--- a/llvm/include/llvm/Analysis/IndirectCallVisitor.h
+++ b/llvm/include/llvm/Analysis/IndirectCallVisitor.h
@@ -19,20 +19,38 @@ namespace llvm {
 // Visitor class that finds all indirect call.
 struct PGOIndirectCallVisitor : public InstVisitor<PGOIndirectCallVisitor> {
   std::vector<CallBase *> IndirectCalls;
+  std::vector<Instruction *> VTableAddrs;
   PGOIndirectCallVisitor() = default;
 
   void visitCallBase(CallBase &Call) {
     if (Call.isIndirectCall())
-      IndirectCalls.push_back(&Call);
+      if (Call.isIndirectCall()) {
+        IndirectCalls.push_back(&Call);
+
+        LoadInst *LI = dyn_cast<LoadInst>(Call.getCalledOperand());
+        if (LI != nullptr) {
+          Value *Ptr = LI->getPointerOperand();
+          Value *VTablePtr = Ptr->stripInBoundsConstantOffsets();
+          if (VTablePtr != nullptr && isa<Instruction>(VTablePtr)) {
+            VTableAddrs.push_back(cast<Instruction>(VTablePtr));
+          }
+        }
+      }
   }
 };
 
-// Helper function that finds all indirect call sites.
 inline std::vector<CallBase *> findIndirectCalls(Function &F) {
   PGOIndirectCallVisitor ICV;
   ICV.visit(F);
   return ICV.IndirectCalls;
 }
+
+inline std::vector<Instruction *> findVTableAddrs(Function &F) {
+  PGOIndirectCallVisitor ICV;
+  ICV.visit(F);
+  return ICV.VTableAddrs;
+}
+
 } // namespace llvm
 
 #endif
diff --git a/llvm/include/llvm/ProfileData/InstrProf.h b/llvm/include/llvm/ProfileData/InstrProf.h
index f9096b46157200b..e5af3767fb746a4 100644
--- a/llvm/include/llvm/ProfileData/InstrProf.h
+++ b/llvm/include/llvm/ProfileData/InstrProf.h
@@ -90,6 +90,9 @@ inline StringRef getInstrProfValueProfMemOpFuncName() {
 /// Return the name prefix of variables containing instrumented function names.
 inline StringRef getInstrProfNameVarPrefix() { return "__profn_"; }
 
+/// Return the name prefix of variables containing virtual table profile data.
+inline StringRef getInstrProfVTableVarPrefix() { return "__profvt_"; }
+
 /// Return the name prefix of variables containing per-function control data.
 inline StringRef getInstrProfDataVarPrefix() { return "__profd_"; }
 
@@ -108,6 +111,8 @@ inline StringRef getInstrProfNamesVarName() {
   return "__llvm_prf_nm";
 }
 
+inline StringRef getInstrProfVTableNamesVarName() { return "__llvm_prf_vnm"; }
+
 /// Return the name of a covarage mapping variable (internal linkage)
 /// for each instrumented source module. Such variables are allocated
 /// in the __llvm_covmap section.
@@ -237,11 +242,16 @@ Error collectPGOFuncNameStrings(ArrayRef<std::string> NameStrs,
 Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
                                 std::string &Result, bool doCompression = true);
 
+Error collectVTableStrings(ArrayRef<GlobalVariable *> VTables,
+                           std::string &Result, bool doCompression);
+
 /// \c NameStrings is a string composed of one of more sub-strings encoded in
 /// the format described above. The substrings are separated by 0 or more zero
 /// bytes. This method decodes the string and populates the \c Symtab.
 Error readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab);
 
+Error readVTableNames(StringRef NameStrings, InstrProfSymtab &Symtab);
+
 /// Check if INSTR_PROF_RAW_VERSION_VAR is defined. This global is only being
 /// set in IR PGO compilation.
 bool isIRPGOFlagSet(const Module *M);
@@ -291,7 +301,7 @@ void createPGOFuncNameMetadata(Function &F, StringRef PGOFuncName);
 
 /// Check if we can use Comdat for profile variables. This will eliminate
 /// the duplicated profile variables for Comdat functions.
-bool needsComdatForCounter(const Function &F, const Module &M);
+bool needsComdatForCounter(const GlobalValue &GV, const Module &M);
 
 /// An enum describing the attributes of an instrumented profile.
 enum class InstrProfKind {
@@ -429,14 +439,24 @@ class InstrProfSymtab {
   uint64_t Address = 0;
   // Unique name strings.
   StringSet<> NameTab;
+  // Unique virtual table names.
+  StringSet<> VTableNames;
   // A map from MD5 keys to function name strings.
   std::vector<std::pair<uint64_t, StringRef>> MD5NameMap;
+  // A map from MD5 keys to virtual table definitions. Only populated when
+  // building the Symtab from a module.
+  std::vector<std::pair<uint64_t, GlobalVariable *>> MD5VTableMap;
   // A map from MD5 keys to function define. We only populate this map
   // when build the Symtab from a Module.
   std::vector<std::pair<uint64_t, Function *>> MD5FuncMap;
   // A map from function runtime address to function name MD5 hash.
   // This map is only populated and used by raw instr profile reader.
   AddrHashMap AddrToMD5Map;
+  // A map from virtual table runtime address to function name MD5 hash.
+  // This map is only populated and used by raw instr profile reader.
+  // This is a different map from 'AddrToMD5Map' for readability and
+  // debuggability.
+  AddrHashMap VTableAddrToMD5Map;
   bool Sorted = false;
 
   static StringRef getExternalSymbol() {
@@ -471,6 +491,8 @@ class InstrProfSymtab {
   /// This method is a wrapper to \c readPGOFuncNameStrings method.
   inline Error create(StringRef NameStrings);
 
+  inline Error create(StringRef FuncNameStrings, StringRef VTableNameStrings);
+
   /// A wrapper interface to populate the PGO symtab with functions
   /// decls from module \c M. This interface is used by transformation
   /// passes such as indirect function call promotion. Variable \c InLTO
@@ -481,6 +503,13 @@ class InstrProfSymtab {
   /// \p IterRange. This interface is used by IndexedProfReader.
   template <typename NameIterRange> Error create(const NameIterRange &IterRange);
 
+  /// Create InstrProfSymtab from a set of function names and vtable
+  /// names iteratable from \p IterRange. This interface is used by
+  /// IndexedProfReader.
+  template <typename FuncNameIterRange, typename VTableNameIterRange>
+  Error create(const FuncNameIterRange &FuncIterRange,
+               const VTableNameIterRange &VTableIterRange);
+
   /// Update the symtab by adding \p FuncName to the table. This interface
   /// is used by the raw and text profile readers.
   Error addFuncName(StringRef FuncName) {
@@ -496,15 +525,49 @@ class InstrProfSymtab {
     return Error::success();
   }
 
+  Error addVTableName(StringRef VTableName) {
+    if (VTableName.empty())
+      return make_error<InstrProfError>(instrprof_error::malformed,
+                                        "invalid input: VTableName is empty");
+    // Insert into NameTab.
+    auto Ins = NameTab.insert(VTableName);
+
+    // Insert into VTableNames.
+    VTableNames.insert(VTableName);
+
+    // If this is newly added, update MD5NameMap.
+    if (Ins.second) {
+      // printf("VTableName %s\n", VTableName.str().c_str());
+      // printf("AddVTableName hash %"PRIu64" to %s\n",
+      // IndexedInstrProf::ComputeHash(VTableName), Ins.first->getKey());
+      MD5NameMap.push_back(std::make_pair(
+          IndexedInstrProf::ComputeHash(VTableName), Ins.first->getKey()));
+      Sorted = false;
+    }
+    return Error::success();
+  }
+
+  const StringSet<> &getVTableNames() const { return VTableNames; }
+
   /// Map a function address to its name's MD5 hash. This interface
   /// is only used by the raw profiler reader.
   void mapAddress(uint64_t Addr, uint64_t MD5Val) {
     AddrToMD5Map.push_back(std::make_pair(Addr, MD5Val));
   }
 
+  // Map the start and end address of a variable to its names' MD5 hash.
+  // This interface is only used by the raw profile header.
+  void mapVTableAddress(uint64_t StartAddr, uint64_t EndAddr, uint64_t MD5Val) {
+    VTableAddrToMD5Map.push_back(std::make_pair(StartAddr, MD5Val));
+    VTableAddrToMD5Map.push_back(std::make_pair(EndAddr, MD5Val));
+  }
+
   /// Return a function's hash, or 0, if the function isn't in this SymTab.
   uint64_t getFunctionHashFromAddress(uint64_t Address);
 
+  /// Return a vtable's hash, or 0 if the vtable doesn't exist in this SymTab.
+  uint64_t getVTableHashFromAddress(uint64_t Address);
+
   /// Return function's PGO name from the function name's symbol
   /// address in the object file. If an error occurs, return
   /// an empty string.
@@ -519,6 +582,11 @@ class InstrProfSymtab {
   /// will be represented using the same StringRef value.
   inline StringRef getFuncNameOrExternalSymbol(uint64_t FuncMD5Hash);
 
+  /// Just like getFuncName, except that it will return a non-empty StringRef
+  /// if the function is external to this symbol table. All such cases
+  /// will be represented using the same StringRef value.
+  // inline StringRef getVTableNameOrExternalSymbol(uint64_t VTableMD5Hash);
+
   /// True if Symbol is the value used to represent external symbols.
   static bool isExternalSymbol(const StringRef &Symbol) {
     return Symbol == InstrProfSymtab::getExternalSymbol();
@@ -526,6 +594,8 @@ class InstrProfSymtab {
 
   /// Return function from the name's md5 hash. Return nullptr if not found.
   inline Function *getFunction(uint64_t FuncMD5Hash);
+  // Return vtable from the name's MD5 hash. Return nullptr if not found.
+  inline GlobalVariable *getGlobalVariable(uint64_t GlobalVariableMD5Hash);
 
   /// Return the name section data.
   inline StringRef getNameData() const { return Data; }
@@ -544,6 +614,16 @@ Error InstrProfSymtab::create(StringRef NameStrings) {
   return readPGOFuncNameStrings(NameStrings, *this);
 }
 
+Error InstrProfSymtab::create(StringRef FuncNameStrings,
+                              StringRef VTableNameStrings) {
+  if (Error E = readPGOFuncNameStrings(FuncNameStrings, *this))
+    return E;
+
+  // FIXME: Add test coverage that this returns success when VTableNameStrings
+  // is empty.
+  return readVTableNames(VTableNameStrings, *this);
+}
+
 template <typename NameIterRange>
 Error InstrProfSymtab::create(const NameIterRange &IterRange) {
   for (auto Name : IterRange)
@@ -554,6 +634,23 @@ Error InstrProfSymtab::create(const NameIterRange &IterRange) {
   return Error::success();
 }
 
+template <typename FuncNameIterRange, typename VTableNameIterRange>
+Error InstrProfSymtab::create(const FuncNameIterRange &FuncIterRange,
+                              const VTableNameIterRange &VTableIterRange) {
+  for (auto Name : FuncIterRange)
+    if (Error E = addFuncName(Name))
+      return E;
+
+  for (auto VTableName : VTableIterRange) {
+    if (Error E = addVTableName(VTableName)) {
+      return E;
+    }
+  }
+
+  finalizeSymtab();
+  return Error::success();
+}
+
 void InstrProfSymtab::finalizeSymtab() {
   if (Sorted)
     return;
@@ -592,6 +689,19 @@ Function* InstrProfSymtab::getFunction(uint64_t FuncMD5Hash) {
   return nullptr;
 }
 
+GlobalVariable *
+InstrProfSymtab::getGlobalVariable(uint64_t GlobalVariableMD5Hash) {
+  finalizeSymtab();
+  auto Result =
+      llvm::lower_bound(MD5VTableMap, GlobalVariableMD5Hash,
+                        [](const std::pair<uint64_t, GlobalVariable *> &LHS,
+                           uint64_t RHS) { return LHS.first < RHS; });
+
+  if (Result != MD5VTableMap.end() && Result->first == GlobalVariableMD5Hash)
+    return Result->second;
+  return nullptr;
+}
+
 // To store the sums of profile count values, or the percentage of
 // the sums of the total count values.
 struct CountSumOrPercent {
@@ -813,6 +923,7 @@ struct InstrProfRecord {
   struct ValueProfData {
     std::vector<InstrProfValueSiteRecord> IndirectCallSites;
     std::vector<InstrProfValueSiteRecord> MemOPSizes;
+    std::vector<InstrProfValueSiteRecord> VTableTargets;
   };
   std::unique_ptr<ValueProfData> ValueData;
 
@@ -835,6 +946,8 @@ struct InstrProfRecord {
       return ValueData->IndirectCallSites;
     case IPVK_MemOPSize:
       return ValueData->MemOPSizes;
+    case IPVK_VTableTarget:
+      return ValueData->VTableTargets;
     default:
       llvm_unreachable("Unknown value kind!");
     }
@@ -849,6 +962,8 @@ struct InstrProfRecord {
       return ValueData->IndirectCallSites;
     case IPVK_MemOPSize:
       return ValueData->MemOPSizes;
+    case IPVK_VTableTarget:
+      return ValueData->VTableTargets;
     default:
       llvm_unreachable("Unknown value kind!");
     }
@@ -1015,6 +1130,8 @@ enum ProfVersion {
   Version9 = 9,
   // An additional (optional) temporal profile traces section is added.
   Version10 = 10,
+  // VTable profiling,
+  Version11 = 11,
   // The current version is 10.
   CurrentVersion = INSTR_PROF_INDEX_VERSION
 };
@@ -1035,6 +1152,7 @@ struct Header {
   uint64_t MemProfOffset;
   uint64_t BinaryIdOffset;
   uint64_t TemporalProfTracesOffset;
+  uint64_t VTableNamesOffset; // Organize virtual table names.
   // New fields should only be added at the end to ensure that the size
   // computation is correct. The methods below need to be updated to ensure that
   // the new field is read correctly.
@@ -1174,6 +1292,11 @@ template <class IntPtrT> struct alignas(8) ProfileData {
   #include "llvm/ProfileData/InstrProfData.inc"
 };
 
+template <class IntPtrT> struct alignas(8) VTableProfileData {
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Init) Type Name;
+#include "llvm/ProfileData/InstrProfData.inc"
+};
+
 // File header structure of the LLVM profile data in raw format.
 // The definition should match the header referenced in
 // compiler-rt/lib/profile/InstrProfilingFile.c  and
diff --git a/llvm/include/llvm/ProfileData/InstrProfData.inc b/llvm/include/llvm/ProfileData/InstrProfData.inc
index 4456bf1ab176325..af2532ffd4844f4 100644
--- a/llvm/include/llvm/ProfileData/InstrProfData.inc
+++ b/llvm/include/llvm/ProfileData/InstrProfData.inc
@@ -91,6 +91,18 @@ INSTR_PROF_DATA(const uint16_t, Int16ArrayTy, NumValueSites[IPVK_Last+1], \
 #undef INSTR_PROF_DATA
 /* INSTR_PROF_DATA end. */
 
+#ifndef INSTR_PROF_VTABLE_DATA
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Initializer)
+#else
+#define INSTR_PROF_VTABLE_DATA_DEFINED
+#endif
+INSTR_PROF_VTABLE_DATA(const uint64_t, llvm::Type::getInt64Ty(Ctx), VTableNameHash, \
+                      ConstantInt::get(llvm::Type::getInt64Ty(Ctx), IndexedInstrProf::ComputeHash(VTableName)))
+INSTR_PROF_VTABLE_DATA(const IntPtrT, llvm::Type::getInt8PtrTy(Ctx), VTablePointer, VTableAddr)
+INSTR_PROF_VTABLE_DATA(const uint32_t, llvm::Type::getInt32Ty(Ctx), VTableSize, \
+                      ConstantInt::get(llvm::Type::getInt32Ty(Ctx), VTableSizeVal))
+#undef INSTR_PROF_VTABLE_DATA
+/* INSTR_PROF_VTABLE_DATA end. */
 
 /* This is an internal data structure used by value profiler. It
  * is defined here to allow serialization code sharing by LLVM
@@ -136,6 +148,8 @@ INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta,
                       (uintptr_t)CountersBegin - (uintptr_t)DataBegin)
 INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 #undef INSTR_PROF_RAW_HEADER
 /* INSTR_PROF_RAW_HEADER  end */
@@ -177,13 +191,14 @@ VALUE_PROF_FUNC_PARAM(uint32_t, CounterIndex, Type::getInt32Ty(Ctx))
 VALUE_PROF_KIND(IPVK_IndirectCallTarget, 0, "indirect call target")
 /* For memory intrinsic functions size profiling. */
 VALUE_PROF_KIND(IPVK_MemOPSize, 1, "memory intrinsic functions size")
+VALUE_PROF_KIND(IPVK_VTableTarget, 2, "vtable target")
 /* These two kinds must be the last to be
  * declared. This is to make sure the string
  * array created with the template can be
  * indexed with the kind value.
  */
 VALUE_PROF_KIND(IPVK_First, IPVK_IndirectCallTarget, "first")
-VALUE_PROF_KIND(IPVK_Last, IPVK_MemOPSize, "last")
+VALUE_PROF_KIND(IPVK_Last, IPVK_VTableTarget, "last")
 
 #undef VALUE_PROF_KIND
 /* VALUE_PROF_KIND end */
@@ -270,12 +285,18 @@ INSTR_PROF_SECT_ENTRY(IPSK_cnts, \
 INSTR_PROF_SECT_ENTRY(IPSK_name, \
                       INSTR_PROF_QUOTE(INSTR_PROF_NAME_COMMON), \
                       INSTR_PROF_NAME_COFF, "__DATA,")
+INSTR_PROF_SECT_ENTRY(IPSK_vname, \
+                      INSTR_PROF_QUOTE(INSTR_PROF_VNAME_COMMON), \
+                      INSTR_PROF_VNAME_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_vals, \
                       INSTR_PROF_QUOTE(INSTR_PROF_VALS_COMMON), \
                       INSTR_PROF_VALS_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_vnodes, \
                       INSTR_PROF_QUOTE(INSTR_PROF_VNODES_COMMON), \
                       INSTR_PROF_VNODES_COFF, "__DATA,")
+INSTR_PROF_SECT_ENTRY(IPSK_vtab, \
+                      INSTR_PROF_QUOTE(INSTR_PROF_VTAB_COMMON), \
+                      INSTR_PROF_VTAB_COFF, "__DATA,")
 INSTR_PROF_SECT_ENTRY(IPSK_covmap, \
                       INSTR_PROF_QUOTE(INSTR_PROF_COVMAP_COMMON), \
                       INSTR_PROF_COVMAP_COFF, "__LLVM_COV,")
@@ -646,9 +667,9 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
 
 /* FIXME: Please remedy the fixme in the header before bumping the version. */
 /* Raw profile format version (start from 1). */
-#define INSTR_PROF_RAW_VERSION 8
+#define INSTR_PROF_RAW_VERSION 9
 /* Indexed profile format version (start from 1). */
-#define INSTR_PROF_INDEX_VERSION 10
+#define INSTR_PROF_INDEX_VERSION 11
 /* Coverage mapping format version (start from 0). */
 #define INSTR_PROF_COVMAP_VERSION 5
 
@@ -686,9 +707,11 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
    than WIN32 */
 #define INSTR_PROF_DATA_COMMON __llvm_prf_data
 #define INSTR_PROF_NAME_COMMON __llvm_prf_names
+#define INSTR_PROF_VNAME_COMMON __llvm_prf_vnames
 #define INSTR_PROF_CNTS_COMMON __llvm_prf_cnts
 #define INSTR_PROF_VALS_COMMON __llvm_prf_vals
 #define INSTR_PROF_VNODES_COMMON __llvm_prf_vnds
+#define INSTR_PROF_VTAB_COMMON __llvm_prf_vtab
 #define INSTR_PROF_COVMAP_COMMON __llvm_covmap
 #define INSTR_PROF_COVFUN_COMMON __llvm_covfun
 #define INSTR_PROF_ORDERFILE_COMMON __llvm_orderfile
@@ -697,9 +720,11 @@ serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
  */
 #define INSTR_PROF_DATA_COFF ".lprfd$M"
 #define INSTR_PROF_NAME_COFF ".lprfn$M"
+#define INSTR_PROF_VNAME_COFF ".lprfvn$M"
 #define INSTR_PROF_CNTS_COFF ".lprfc$M"
 #define INSTR_PROF_VALS_COFF ".lprfv$M"
 #define INSTR_PROF_VNODES_COFF ".lprfnd$M"
+#define INSTR_PROF_VTAB_COFF ".lprfvt$M"
 #define INSTR_PROF_COVMAP_COFF ".lcovmap$M"
 #define INSTR_PROF_COVFUN_COFF ".lcovfun$M"
 #define INSTR_PROF_ORDERFILE_COFF ".lorderfile$M"
diff --git a/llvm/include/llvm/ProfileData/InstrProfReader.h b/llvm/include/llvm/ProfileData/InstrProfReader.h
index 74e921e10c47b9a..bc5abf27385fc7e 100644
--- a/llvm/include/llvm/ProfileData/InstrProfReader.h
+++ b/llvm/include/llvm/ProfileData/InstrProfReader.h
@@ -326,10 +326,14 @@ class RawInstrProfReader : public InstrProfReader {
   uint64_t NamesDelta;
   const RawInstrProf::ProfileData<IntPtrT> *Data;
   const RawInstrProf::ProfileData<IntPtrT> *DataEnd;
+  const RawInstrProf::VTableProfileData<IntPtrT> *VTableBegin = nullptr;
+  const RawInstrProf::VTableProfileData<IntPtrT> *VTableEnd = nullptr;
   const char *CountersStart;
   const char *CountersEnd;
   const char *NamesStart;
   const char *NamesEnd;
+  const char *VNamesStart = nullptr;
+  const char *VNamesEnd = nullptr;
   // After value profile is all read, this pointer points to
   // the header of next profile data (if exists)
   const uint8_t *ValueDataStart;
@@ -469,6 +473,46 @@ enum class HashT : uint32_t;
 
 } // end namespace IndexedInstrProf
 
+class InstrProfVTableLookupTrait {
+  char val;
+  IndexedInstrProf::HashT HashType;
+  unsigned FormatVersion;
+
+public:
+  InstrProfVTableLookupTrait(IndexedInstrProf::HashT HashType,
+                             unsigned FormatVersion)
+      : HashType(HashType), FormatVersion(FormatVersion) {}
+
+  using data_type = char;
+
+  using internal_key_type = StringRef;
+  using external_key_type = StringRef;
+
+  using hash_value_type = uint64_t;
+  using offset_type = uint64_t;
+
+  static bool EqualKey(StringRef A, StringRef B) { return A == B; }
+  static StringRef GetInternalKey(StringRef K) { return K; }
+  static StringRef GetExternalKey(StringRef K) { return K; }
+
+  hash_value_type ComputeHash(StringRef K);
+
+  static std::pair<offset_type, offset_type>
+  ReadKeyDataLength(const unsigned char *&D) {
+    using namespace support;
+
+    offset_type KeyLen = endian::readNext<offset_type, little, unaligned>(D);
+    offset_type DataLen = endian::readNext<offset_type, little, unaligned>(D);
+    return std::make_pair(KeyLen, DataLen);
+  }
+
+  StringRef ReadKey(const unsigned char *D, offset_type N) {
+    return StringRef((const char *)D, N);
+  }
+
+  data_type ReadData(StringRef K, const unsigned char *D, offset_type N);
+};
+
 /// Trait for lookups into the on-disk hash table for the binary instrprof
 /// format.
 class InstrProfLookupTrait {
@@ -520,6 +564,9 @@ class InstrProfLookupTrait {
   }
 };
 
+using VirtualTableNamesHashTable =
+    OnDiskIterableChainedHashTable<InstrProfVTableLookupTrait>;
+
 struct InstrProfReaderIndexBase {
   virtual ~InstrProfReaderIndexBase() = default;
 
@@ -542,7 +589,10 @@ struct InstrProfReaderIndexBase {
   virtual bool hasMemoryProfile() const = 0;
   virtual bool hasTemporalProfile() const = 0;
   virtual InstrProfKind getProfileKind() const = 0;
-  virtual Error populateSymtab(InstrProfSymtab &) = 0;
+  // The pointer VirtualTableIndex is not owned.
+  virtual Error
+  populateSymtab(InstrProfSymtab &,
+                 VirtualTableNamesHashTable *VirtualTableIndex) = 0;
 };
 
 using OnDiskHashTableImplV3 =
@@ -617,7 +667,10 @@ class InstrProfReaderIndex : public InstrProfReaderIndexBase {
 
   InstrProfKind getProfileKind() const override;
 
-  Error populateSymtab(InstrProfSymtab &Symtab) override {
+  Error populateSymtab(InstrProfSymtab &Symtab,
+                       VirtualTableNamesHashTable *VirtualTableIndex) override {
+    if (VirtualTableIndex != nullptr)
+      return Symtab.create(HashTable->keys(), VirtualTableIndex->keys());
     return Symtab.create(HashTable->keys());
   }
 };
@@ -652,6 +705,8 @@ class IndexedInstrProfReader : public InstrProfReader {
   std::unique_ptr<MemProfRecordHashTable> MemProfRecordTable;
   /// MemProf frame profile data on-disk indexed via frame id.
   std::unique_ptr<MemProfFrameHashTable> MemProfFrameTable;
+  /// Virtual table profile data indexed .
+  std::unique_ptr<VirtualTableNamesHashTable> VirtualTableIndex = nullptr;
   /// Total size of binary ids.
   uint64_t BinaryIdsSize{0};
   /// Start address of binary id length and data pairs.
diff --git a/llvm/include/llvm/ProfileData/InstrProfWriter.h b/llvm/include/llvm/ProfileData/InstrProfWriter.h
index e50705ee053eea8..c38bc621469ede0 100644
--- a/llvm/include/llvm/ProfileData/InstrProfWriter.h
+++ b/llvm/include/llvm/ProfileData/InstrProfWriter.h
@@ -64,6 +64,9 @@ class InstrProfWriter {
   // List of binary ids.
   std::vector<llvm::object::BuildID> BinaryIds;
 
+  // Read the vtable names from raw instr profile reader.
+  StringSet<> VTableNames;
+
   // An enum describing the attributes of the profile.
   InstrProfKind ProfileKind = InstrProfKind::Unknown;
   // Use raw pointer here for the incomplete type object.
@@ -85,6 +88,7 @@ class InstrProfWriter {
   void addRecord(NamedInstrProfRecord &&I, function_ref<void(Error)> Warn) {
     addRecord(std::move(I), 1, Warn);
   }
+  void addVTableName(StringRef VTableName) { VTableNames.insert(VTableName); }
 
   /// Add \p SrcTraces using reservoir sampling where \p SrcStreamSize is the
   /// total number of temporal profiling traces the source has seen.
diff --git a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
index cb0c055dcb74ae8..9af090c0c2e6825 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
@@ -56,12 +56,18 @@ class InstrProfiling : public PassInfoMixin<InstrProfiling> {
     }
   };
   DenseMap<GlobalVariable *, PerFunctionProfileData> ProfileDataMap;
+  // Key is virtual table variable, value is 'VTableProfData' in the form of
+  // GlobalVariable.
+  DenseMap<GlobalVariable *, GlobalVariable *> VTableDataMap;
   /// If runtime relocation is enabled, this maps functions to the load
   /// instruction that produces the profile relocation bias.
   DenseMap<const Function *, LoadInst *> FunctionToProfileBiasMap;
   std::vector<GlobalValue *> CompilerUsedVars;
   std::vector<GlobalValue *> UsedVars;
   std::vector<GlobalVariable *> ReferencedNames;
+  // The list of virtual table variables of which the VTableProfData is
+  // collected.
+  std::vector<GlobalVariable *> ReferencedVTableNames;
   GlobalVariable *NamesVar;
   size_t NamesSize;
 
@@ -115,6 +121,9 @@ class InstrProfiling : public PassInfoMixin<InstrProfiling> {
   /// referring to them will also be created.
   GlobalVariable *getOrCreateRegionCounters(InstrProfInstBase *Inc);
 
+  /// Get the counters for virtual table values, creating them if necessary.
+  void getOrCreateVTableProfData(GlobalVariable *GV);
+
   /// Create the region counters.
   GlobalVariable *createRegionCounters(InstrProfInstBase *Inc, StringRef Name,
                                        GlobalValue::LinkageTypes Linkage);
@@ -122,6 +131,9 @@ class InstrProfiling : public PassInfoMixin<InstrProfiling> {
   /// Emit the section with compressed function names.
   void emitNameData();
 
+  /// Emit the section with compressed vtable names.
+  void emitVTableNames();
+
   /// Emit value nodes section for value profiling.
   void emitVNodes();
 
diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index 835dd697bc7b6aa..62a155b01e313a5 100644
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -436,6 +436,18 @@ Error InstrProfSymtab::create(Module &M, bool InLTO) {
     if (Error E = addFuncWithName(F, getPGOFuncName(F, InLTO)))
       return E;
   }
+
+  SmallVector<MDNode *, 2> Types;
+  for (GlobalVariable &G : M.globals()) {
+    if (!G.hasName())
+      continue;
+    Types.clear();
+    G.getMetadata(LLVMContext::MD_type, Types);
+    if (!Types.empty()) {
+      // errs() << "Insert " << G.getGUID() << "\t into MD5VTableMap\n";
+      MD5VTableMap.emplace_back(G.getGUID(), &G);
+    }
+  }
   Sorted = false;
   finalizeSymtab();
   return Error::success();
@@ -473,6 +485,26 @@ Error InstrProfSymtab::addFuncWithName(Function &F, StringRef PGOFuncName) {
   return Error::success();
 }
 
+uint64_t InstrProfSymtab::getVTableHashFromAddress(uint64_t Address) {
+  finalizeSymtab();
+  // printf("look up key 0x%llx\n", Address);
+  // for (auto iter = VTableAddrToMD5Map.begin(); iter !=
+  // VTableAddrToMD5Map.end(); iter++) {
+  //   printf("<key, val> is <0x%llx, %"PRIu64"\n", iter->first, iter->second);
+  // }
+  auto It =
+      partition_point(VTableAddrToMD5Map, [=](std::pair<uint64_t, uint64_t> A) {
+        return A.first < Address;
+      });
+  // FIXME: Does the raw function pointers point apply here?
+  if (It != VTableAddrToMD5Map.end()) {
+    // printf("InstrProfSymtab::getVTableHashFromAddress map addr 0x%llx to hash
+    // value %"PRIu64"\n", Address, (uint64_t)It->second);
+    return (uint64_t)It->second;
+  }
+  return 0;
+}
+
 uint64_t InstrProfSymtab::getFunctionHashFromAddress(uint64_t Address) {
   finalizeSymtab();
   auto It = partition_point(AddrToMD5Map, [=](std::pair<uint64_t, uint64_t> A) {
@@ -549,42 +581,112 @@ Error collectPGOFuncNameStrings(ArrayRef<GlobalVariable *> NameVars,
       NameStrs, compression::zlib::isAvailable() && doCompression, Result);
 }
 
+Error collectVTableStrings(ArrayRef<GlobalVariable *> VTables,
+                           std::string &Result, bool doCompression) {
+  std::vector<std::string> VTableNameStrs;
+  for (auto *VTable : VTables) {
+    // printf("VTable name %s added\n", VTable->getName().str().c_str());
+    VTableNameStrs.push_back(std::string(VTable->getName()));
+  }
+  return collectPGOFuncNameStrings(
+      VTableNameStrs, compression::zlib::isAvailable() && doCompression,
+      Result);
+}
+
+instrprof_error decodeAndSplitStrings(
+    const uint8_t *Input, SmallVector<uint8_t, 128> &UncompressedNameStrings,
+    StringRef &NameStrings, uint32_t &Dist, bool &isCompressed) {
+  Dist = 0;
+  const uint8_t *Start = Input;
+  uint32_t UncompressedSizeLen = 0;
+  uint64_t UncompressedSize = decodeULEB128(Start, &UncompressedSizeLen);
+  Start += UncompressedSizeLen;
+  Dist += UncompressedSizeLen;
+  uint32_t CompressedSizeLen = 0;
+  uint64_t CompressedSize = decodeULEB128(Start, &CompressedSizeLen);
+  Start += CompressedSizeLen;
+  Dist += CompressedSizeLen;
+  isCompressed = (CompressedSize != 0);
+  if (isCompressed) {
+    if (!llvm::compression::zlib::isAvailable())
+      return instrprof_error::zlib_unavailable;
+
+    if (Error E = compression::zlib::decompress(ArrayRef(Start, CompressedSize),
+                                                UncompressedNameStrings,
+                                                UncompressedSize)) {
+      consumeError(std::move(E));
+      return instrprof_error::uncompress_failed;
+    }
+    Dist += CompressedSize;
+  } else {
+    NameStrings =
+        StringRef(reinterpret_cast<const char *>(Start), UncompressedSize);
+    Dist += UncompressedSize;
+  }
+
+  return instrprof_error::success;
+}
+
 Error readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab) {
   const uint8_t *P = NameStrings.bytes_begin();
   const uint8_t *EndP = NameStrings.bytes_end();
   while (P < EndP) {
-    uint32_t N;
-    uint64_t UncompressedSize = decodeULEB128(P, &N);
-    P += N;
-    uint64_t CompressedSize = decodeULEB128(P, &N);
-    P += N;
-    bool isCompressed = (CompressedSize != 0);
-    SmallVector<uint8_t, 128> UncompressedNameStrings;
+    // Now parse the name strings.
+    uint32_t Dist = 0;
     StringRef NameStrings;
+    SmallVector<uint8_t, 128> UncompressedNameStrings;
+    SmallVector<StringRef, 0> Names;
+    bool isCompressed = false;
+    instrprof_error E = decodeAndSplitStrings(P, UncompressedNameStrings,
+                                              NameStrings, Dist, isCompressed);
+    if (E != instrprof_error::success)
+      return make_error<InstrProfError>(E);
+
     if (isCompressed) {
-      if (!llvm::compression::zlib::isAvailable())
-        return make_error<InstrProfError>(instrprof_error::zlib_unavailable);
-
-      if (Error E = compression::zlib::decompress(ArrayRef(P, CompressedSize),
-                                                  UncompressedNameStrings,
-                                                  UncompressedSize)) {
-        consumeError(std::move(E));
-        return make_error<InstrProfError>(instrprof_error::uncompress_failed);
-      }
-      P += CompressedSize;
       NameStrings = toStringRef(UncompressedNameStrings);
-    } else {
-      NameStrings =
-          StringRef(reinterpret_cast<const char *>(P), UncompressedSize);
-      P += UncompressedSize;
     }
+
+    NameStrings.split(Names, getInstrProfNameSeparator());
+    for (StringRef &Name : Names) {
+      if (Error E = Symtab.addFuncName(Name))
+        return E;
+    }
+
+    P += Dist;
+    // Skip padding?
+    while (P < EndP && *P == 0)
+      P++;
+  }
+  return Error::success();
+}
+
+Error readVTableNames(StringRef NameStrings, InstrProfSymtab &Symtab) {
+  const uint8_t *P = NameStrings.bytes_begin();
+  const uint8_t *EndP = NameStrings.bytes_end();
+  while (P < EndP) {
     // Now parse the name strings.
+    uint32_t Dist = 0;
+    StringRef NameStrings;
+    SmallVector<uint8_t, 128> UncompressedNameStrings;
     SmallVector<StringRef, 0> Names;
+    bool isCompressed = false;
+    instrprof_error E = decodeAndSplitStrings(P, UncompressedNameStrings,
+                                              NameStrings, Dist, isCompressed);
+    if (E != instrprof_error::success)
+      return make_error<InstrProfError>(E);
+
+    if (isCompressed) {
+      NameStrings = toStringRef(UncompressedNameStrings);
+    }
     NameStrings.split(Names, getInstrProfNameSeparator());
-    for (StringRef &Name : Names)
-      if (Error E = Symtab.addFuncName(Name))
+    for (StringRef &Name : Names) {
+      // printf("Read back vtable name %s\n", Name.str().c_str());
+      if (Error E = Symtab.addVTableName(Name))
         return E;
+    }
 
+    P += Dist;
+    // Skip padding?
     while (P < EndP && *P == 0)
       P++;
   }
@@ -841,6 +943,11 @@ uint64_t InstrProfRecord::remapValue(uint64_t Value, uint32_t ValueKind,
   if (ValueKind == IPVK_IndirectCallTarget)
     return SymTab->getFunctionHashFromAddress(Value);
 
+  if (ValueKind == IPVK_VTableTarget) {
+    uint64_t VTableHash = SymTab->getVTableHashFromAddress(Value);
+    return VTableHash;
+  }
+
   return Value;
 }
 
@@ -1232,8 +1339,8 @@ void createPGOFuncNameMetadata(Function &F, StringRef PGOFuncName) {
   F.setMetadata(getPGOFuncNameMetadataName(), N);
 }
 
-bool needsComdatForCounter(const Function &F, const Module &M) {
-  if (F.hasComdat())
+bool needsComdatForCounter(const GlobalValue &GV, const Module &M) {
+  if (GV.hasComdat())
     return true;
 
   if (!Triple(M.getTargetTriple()).supportsCOMDAT())
@@ -1249,7 +1356,7 @@ bool needsComdatForCounter(const Function &F, const Module &M) {
   // available_externally functions will end up being duplicated in raw profile
   // data. This can result in distorted profile as the counts of those dups
   // will be accumulated by the profile merger.
-  GlobalValue::LinkageTypes Linkage = F.getLinkage();
+  GlobalValue::LinkageTypes Linkage = GV.getLinkage();
   if (Linkage != GlobalValue::ExternalWeakLinkage &&
       Linkage != GlobalValue::AvailableExternallyLinkage)
     return false;
@@ -1413,6 +1520,9 @@ void OverlapStats::dump(raw_fd_ostream &OS) const {
     case IPVK_MemOPSize:
       strncpy(ProfileKindName, "MemOP", 19);
       break;
+    case IPVK_VTableTarget:
+      strncpy(ProfileKindName, "VTable", 19);
+      break;
     default:
       snprintf(ProfileKindName, 19, "VP[%d]", I);
       break;
@@ -1476,9 +1586,12 @@ Expected<Header> Header::readFromBuffer(const unsigned char *Buffer) {
     // When a new field is added in the header add a case statement here to
     // populate it.
     static_assert(
-        IndexedInstrProf::ProfVersion::CurrentVersion == Version10,
+        IndexedInstrProf::ProfVersion::CurrentVersion == Version11,
         "Please update the reading code below if a new field has been added, "
         "if not add a case statement to fall through to the latest version.");
+  case 11ull:
+    H.VTableNamesOffset = read(Buffer, offsetOf(&Header::VTableNamesOffset));
+    [[fallthrough]];
   case 10ull:
     H.TemporalProfTracesOffset =
         read(Buffer, offsetOf(&Header::TemporalProfTracesOffset));
@@ -1502,10 +1615,13 @@ size_t Header::size() const {
     // When a new field is added to the header add a case statement here to
     // compute the size as offset of the new field + size of the new field. This
     // relies on the field being added to the end of the list.
-    static_assert(IndexedInstrProf::ProfVersion::CurrentVersion == Version10,
+    static_assert(IndexedInstrProf::ProfVersion::CurrentVersion == Version11,
                   "Please update the size computation below if a new field has "
                   "been added to the header, if not add a case statement to "
                   "fall through to the latest version.");
+  case 11ull:
+    return offsetOf(&Header::VTableNamesOffset) +
+           sizeof(Header::VTableNamesOffset);
   case 10ull:
     return offsetOf(&Header::TemporalProfTracesOffset) +
            sizeof(Header::TemporalProfTracesOffset);
diff --git a/llvm/lib/ProfileData/InstrProfReader.cpp b/llvm/lib/ProfileData/InstrProfReader.cpp
index db20441b712cd24..11951f20780c1eb 100644
--- a/llvm/lib/ProfileData/InstrProfReader.cpp
+++ b/llvm/lib/ProfileData/InstrProfReader.cpp
@@ -372,6 +372,14 @@ TextInstrProfReader::readValueProfileData(InstrProfRecord &Record) {
               return E;
             Value = IndexedInstrProf::ComputeHash(VD.first);
           }
+        } else if (ValueKind == IPVK_VTableTarget) {
+          if (InstrProfSymtab::isExternalSymbol(VD.first)) {
+            Value = 0;
+          } else {
+            if (Error E = Symtab->addVTableName(VD.first))
+              return E;
+            Value = IndexedInstrProf::ComputeHash(VD.first);
+          }
         } else {
           READ_NUM(VD.first, Value);
         }
@@ -516,14 +524,31 @@ Error RawInstrProfReader<IntPtrT>::readNextHeader(const char *CurrentPos) {
 
 template <class IntPtrT>
 Error RawInstrProfReader<IntPtrT>::createSymtab(InstrProfSymtab &Symtab) {
-  if (Error E = Symtab.create(StringRef(NamesStart, NamesEnd - NamesStart)))
+  if (Error E =
+          Symtab.create(StringRef(NamesStart, NamesEnd - NamesStart),
+                        StringRef(VNamesStart, VNamesEnd - VNamesStart))) {
     return error(std::move(E));
+  }
   for (const RawInstrProf::ProfileData<IntPtrT> *I = Data; I != DataEnd; ++I) {
     const IntPtrT FPtr = swap(I->FunctionPointer);
     if (!FPtr)
       continue;
     Symtab.mapAddress(FPtr, I->NameRef);
   }
+
+  if (VTableBegin != nullptr && VTableEnd != nullptr) {
+    for (const RawInstrProf::VTableProfileData<IntPtrT> *I = VTableBegin;
+         I != VTableEnd; ++I) {
+      const IntPtrT VPtr = I->VTablePointer;
+      if (!VPtr)
+        continue;
+      // Map both begin and end address to the name hash, since the instrumented
+      // address could be somewhere in the middle.
+      // VPtr is of type uint32_t or uint64_t so 'VPtr + I->VTableSize' marks
+      // the end of vtable address.
+      Symtab.mapVTableAddress(VPtr, VPtr + I->VTableSize, I->VTableNameHash);
+    }
+  }
   return success();
 }
 
@@ -555,17 +580,29 @@ Error RawInstrProfReader<IntPtrT>::readHeader(
   auto CountersSize = swap(Header.NumCounters) * getCounterTypeSize();
   auto PaddingBytesAfterCounters = swap(Header.PaddingBytesAfterCounters);
   auto NamesSize = swap(Header.NamesSize);
+  auto VTableNameSize = Header.VNamesSize;
+  auto NumVTables = Header.NumVTables;
   ValueKindLast = swap(Header.ValueKindLast);
 
   auto DataSize = NumData * sizeof(RawInstrProf::ProfileData<IntPtrT>);
-  auto PaddingSize = getNumPaddingBytes(NamesSize);
+  auto PaddingBytesAfterNames = getNumPaddingBytes(NamesSize);
+  auto PaddingBytesAfterVTableNames = getNumPaddingBytes(VTableNameSize);
+
+  auto VTableSectionSize =
+      Header.NumVTables * sizeof(RawInstrProf::VTableProfileData<IntPtrT>);
+  auto PaddingBytesAfterVTableProfData = getNumPaddingBytes(VTableSectionSize);
 
   // Profile data starts after profile header and binary ids if exist.
   ptrdiff_t DataOffset = sizeof(RawInstrProf::Header) + BinaryIdsSize;
   ptrdiff_t CountersOffset = DataOffset + DataSize + PaddingBytesBeforeCounters;
   ptrdiff_t NamesOffset =
       CountersOffset + CountersSize + PaddingBytesAfterCounters;
-  ptrdiff_t ValueDataOffset = NamesOffset + NamesSize + PaddingSize;
+  ptrdiff_t VTableProfDataOffset =
+      NamesOffset + NamesSize + PaddingBytesAfterNames;
+  ptrdiff_t VTableNameOffset = VTableProfDataOffset + VTableSectionSize +
+                               PaddingBytesAfterVTableProfData;
+  ptrdiff_t ValueDataOffset =
+      VTableNameOffset + VTableNameSize + PaddingBytesAfterVTableNames;
 
   auto *Start = reinterpret_cast<const char *>(&Header);
   if (Start + ValueDataOffset > DataBuffer->getBufferEnd())
@@ -584,8 +621,14 @@ Error RawInstrProfReader<IntPtrT>::readHeader(
     Data = reinterpret_cast<const RawInstrProf::ProfileData<IntPtrT> *>(
         Start + DataOffset);
     DataEnd = Data + NumData;
+    VTableBegin =
+        reinterpret_cast<const RawInstrProf::VTableProfileData<IntPtrT> *>(
+            Start + VTableProfDataOffset);
+    VTableEnd = VTableBegin + NumVTables;
     NamesStart = Start + NamesOffset;
     NamesEnd = NamesStart + NamesSize;
+    VNamesStart = Start + VTableNameOffset;
+    VNamesEnd = VNamesStart + VTableNameSize;
   }
 
   // Binary ids start just after the header.
@@ -831,6 +874,19 @@ data_type InstrProfLookupTrait::ReadData(StringRef K, const unsigned char *D,
   return DataBuffer;
 }
 
+InstrProfVTableLookupTrait::hash_value_type
+InstrProfVTableLookupTrait::ComputeHash(StringRef K) {
+  return IndexedInstrProf::ComputeHash(HashType, K);
+}
+
+InstrProfVTableLookupTrait::data_type
+InstrProfVTableLookupTrait::ReadData(StringRef K, const unsigned char *D,
+                                     offset_type N) {
+  char v =
+      support::endian::readNext<char, support::little, support::unaligned>(D);
+  return v;
+}
+
 template <typename HashTableImpl>
 Error InstrProfReaderIndex<HashTableImpl>::getRecords(
     StringRef FuncName, ArrayRef<NamedInstrProfRecord> &Data) {
@@ -1150,6 +1206,21 @@ Error IndexedInstrProfReader::readHeader() {
                                         "corrupted binary ids");
   }
 
+  if (GET_VERSION(Header->formatVersion()) >= 11) {
+    uint64_t VTableNamesOffset =
+        endian::byte_swap<uint64_t, little>(Header->VTableNamesOffset);
+    const unsigned char *Ptr = Start + VTableNamesOffset;
+
+    const uint64_t HashTableMetadataOffset =
+        support::endian::readNext<uint64_t, little, unaligned>(Ptr);
+
+    VirtualTableIndex.reset(VirtualTableNamesHashTable::Create(
+        /*Bucket=*/Start + HashTableMetadataOffset,
+        /*Payload=*/Ptr,
+        /*Base=*/Start,
+        InstrProfVTableLookupTrait(HashType, Header->formatVersion())));
+  }
+
   if (GET_VERSION(Header->formatVersion()) >= 10 &&
       Header->formatVersion() & VARIANT_MASK_TEMPORAL_PROF) {
     uint64_t TemporalProfTracesOffset =
@@ -1204,7 +1275,7 @@ InstrProfSymtab &IndexedInstrProfReader::getSymtab() {
     return *Symtab;
 
   std::unique_ptr<InstrProfSymtab> NewSymtab = std::make_unique<InstrProfSymtab>();
-  if (Error E = Index->populateSymtab(*NewSymtab)) {
+  if (Error E = Index->populateSymtab(*NewSymtab, VirtualTableIndex.get())) {
     auto [ErrCode, Msg] = InstrProfError::take(std::move(E));
     consumeError(error(ErrCode, Msg));
   }
diff --git a/llvm/lib/ProfileData/InstrProfWriter.cpp b/llvm/lib/ProfileData/InstrProfWriter.cpp
index b74d5c3862d803d..786993153a8b376 100644
--- a/llvm/lib/ProfileData/InstrProfWriter.cpp
+++ b/llvm/lib/ProfileData/InstrProfWriter.cpp
@@ -170,6 +170,47 @@ class InstrProfRecordWriterTrait {
   }
 };
 
+class InstrProfRecordVTableTrait {
+public:
+  using key_type = StringRef;
+  using key_type_ref = StringRef;
+
+  using data_type = char;
+  using data_type_ref = char;
+
+  using hash_value_type = uint64_t;
+  using offset_type = uint64_t;
+
+  InstrProfRecordVTableTrait() = default;
+
+  static hash_value_type ComputeHash(key_type_ref K) {
+    return IndexedInstrProf::ComputeHash(K);
+  }
+
+  static std::pair<offset_type, offset_type>
+  EmitKeyDataLength(raw_ostream &Out, key_type_ref K, data_type_ref V) {
+    using namespace support;
+
+    endian::Writer LE(Out, little);
+
+    offset_type N = K.size();
+    LE.write<offset_type>(N);
+
+    offset_type M = 1;
+    LE.write<offset_type>(M);
+
+    return std::make_pair(N, M);
+  }
+
+  void EmitKey(raw_ostream &Out, key_type_ref K, offset_type N) {
+    Out.write(K.data(), N);
+  }
+
+  void EmitData(raw_ostream &Out, key_type_ref, data_type_ref V, offset_type) {
+    Out.write(&V, 1);
+  }
+};
+
 } // end namespace llvm
 
 InstrProfWriter::InstrProfWriter(bool Sparse,
@@ -447,12 +488,13 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
   Header.MemProfOffset = 0;
   Header.BinaryIdOffset = 0;
   Header.TemporalProfTracesOffset = 0;
+  Header.VTableNamesOffset = 0;
   int N = sizeof(IndexedInstrProf::Header) / sizeof(uint64_t);
 
   // Only write out all the fields except 'HashOffset', 'MemProfOffset',
-  // 'BinaryIdOffset' and `TemporalProfTracesOffset`. We need to remember the
-  // offset of these fields to allow back patching later.
-  for (int I = 0; I < N - 4; I++)
+  // 'BinaryIdOffset', `TemporalProfTracesOffset` and `VTableNamesOffset`. We
+  // need to remember the offset of these fields to allow back patching later.
+  for (int I = 0; I < N - 5; I++)
     OS.write(reinterpret_cast<uint64_t *>(&Header)[I]);
 
   // Save the location of Header.HashOffset field in \c OS.
@@ -476,6 +518,9 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
   uint64_t TemporalProfTracesOffset = OS.tell();
   OS.write(0);
 
+  uint64_t VTableNamesOffset = OS.tell();
+  OS.write(0);
+
   // Reserve space to write profile summary data.
   uint32_t NumEntries = ProfileSummaryBuilder::DefaultCutoffs.size();
   uint32_t SummarySize = Summary::getSize(Summary::NumKinds, NumEntries);
@@ -589,6 +634,36 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
       OS.writeByte(0);
   }
 
+  // if version >= the version with vtable profile metadata
+  // Intentionally put vtable names before temporal profile section.
+  uint64_t VTableNamesSectionStart = 0;
+  if (IndexedInstrProf::ProfVersion::CurrentVersion >= 11) {
+    VTableNamesSectionStart = OS.tell();
+
+    // Reserve space for vtable record table offset.
+    OS.write(0ULL);
+
+    OnDiskChainedHashTableGenerator<llvm::InstrProfRecordVTableTrait>
+        VTableNamesGenerator;
+    for (const auto &kv : VTableNames) {
+      // printf("InstrProfWriter.cpp key is %s\n", kv.getKey().str().c_str());
+      VTableNamesGenerator.insert(kv.getKey(), '0');
+    }
+
+    auto VTableNamesWriter =
+        std::make_unique<llvm::InstrProfRecordVTableTrait>();
+
+    uint64_t VTableNamesTableOffset =
+        VTableNamesGenerator.Emit(OS.OS, *VTableNamesWriter);
+
+    // printf("InstrProfWriter.cpp:VTableNamesSectionStart is %"PRIu64"\n",
+    // VTableNamesSectionStart); printf("\tVTableNamesTableOffset is
+    // %"PRIu64"\n", VTableNamesTableOffset);
+    PatchItem PatchItems[] = {
+        {VTableNamesSectionStart, &VTableNamesTableOffset, 1}};
+    OS.patch(PatchItems, 1);
+  }
+
   uint64_t TemporalProfTracesSectionStart = 0;
   if (static_cast<bool>(ProfileKind & InstrProfKind::TemporalProfile)) {
     TemporalProfTracesSectionStart = OS.tell();
@@ -632,6 +707,7 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
       // Patch the Header.TemporalProfTracesOffset (=0 for profiles without
       // traces).
       {TemporalProfTracesOffset, &TemporalProfTracesSectionStart, 1},
+      {VTableNamesOffset, &VTableNamesSectionStart, 1},
       // Patch the summary data.
       {SummaryOffset, reinterpret_cast<uint64_t *>(TheSummary.get()),
        (int)(SummarySize / sizeof(uint64_t))},
@@ -684,7 +760,8 @@ Error InstrProfWriter::validateRecord(const InstrProfRecord &Func) {
       std::unique_ptr<InstrProfValueData[]> VD = Func.getValueForSite(VK, S);
       DenseSet<uint64_t> SeenValues;
       for (uint32_t I = 0; I < ND; I++)
-        if ((VK != IPVK_IndirectCallTarget) && !SeenValues.insert(VD[I].Value).second)
+        if ((VK != IPVK_IndirectCallTarget && VK != IPVK_VTableTarget) &&
+            !SeenValues.insert(VD[I].Value).second)
           return make_error<InstrProfError>(instrprof_error::invalid_prof);
     }
   }
@@ -721,7 +798,7 @@ void InstrProfWriter::writeRecordInText(StringRef Name, uint64_t Hash,
       OS << ND << "\n";
       std::unique_ptr<InstrProfValueData[]> VD = Func.getValueForSite(VK, S);
       for (uint32_t I = 0; I < ND; I++) {
-        if (VK == IPVK_IndirectCallTarget)
+        if (VK == IPVK_IndirectCallTarget || VK == IPVK_VTableTarget)
           OS << Symtab.getFuncNameOrExternalSymbol(VD[I].Value) << ":"
              << VD[I].Count << "\n";
         else
@@ -758,6 +835,11 @@ Error InstrProfWriter::writeText(raw_fd_ostream &OS) {
     }
   }
 
+  for (const auto &VTableName : VTableNames) {
+    if (Error E = Symtab.addVTableName(VTableName.getKey()))
+      return E;
+  }
+
   if (static_cast<bool>(ProfileKind & InstrProfKind::TemporalProfile))
     writeTextTemporalProfTraceData(OS, Symtab);
 
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index c90692980d86ac5..9c94df86e4bf923 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -559,6 +559,13 @@ bool InstrProfiling::run(
       static_cast<void>(getOrCreateRegionCounters(FirstProfInst));
   }
 
+  for (GlobalVariable &GV : M.globals()) {
+    // Global variables with type metadata are virtual table variables.
+    if (GV.hasMetadata(LLVMContext::MD_type)) {
+      getOrCreateVTableProfData(&GV);
+    }
+  }
+
   for (Function &F : M)
     MadeChange |= lowerIntrinsics(&F);
 
@@ -572,6 +579,7 @@ bool InstrProfiling::run(
 
   emitVNodes();
   emitNameData();
+  emitVTableNames();
 
   // Emit runtime hook for the cases where the target does not unconditionally
   // require pulling in profile runtime, and coverage is enabled on code that is
@@ -977,6 +985,135 @@ InstrProfiling::createRegionCounters(InstrProfInstBase *Inc, StringRef Name,
   return GV;
 }
 
+static inline bool shouldRecordVTableAddr(GlobalVariable *GV) {
+  if (!profDataReferencedByCode(*GV->getParent()))
+    return false;
+
+  if (!GV->hasLinkOnceLinkage() && !GV->hasLocalLinkage() &&
+      !GV->hasAvailableExternallyLinkage())
+    return true;
+
+  // This avoids the profile data from referencing internal symbols in
+  // COMDAT.
+  if (GV->hasLocalLinkage() && GV->hasComdat())
+    return false;
+
+  return true;
+}
+
+// FIXME: Does symbollic relocation from 'getFuncAddrForProfData' matter here?
+static inline Constant *getVTableAddrForProfData(GlobalVariable *GV) {
+  // Store a nullptr in __profvt_ if a real address shouldn't be used.
+  auto *Int8PtrTy = Type::getInt8PtrTy(GV->getContext());
+
+  if (!shouldRecordVTableAddr(GV))
+    return ConstantPointerNull::get(Int8PtrTy);
+
+  return ConstantExpr::getBitCast(GV, Int8PtrTy);
+}
+
+/// Get the name of a profiling variable for a particular variable.
+static std::string getVarName(GlobalVariable *GV, StringRef Prefix) {
+  StringRef Name = GV->getName();
+  return (Prefix + Name).str();
+}
+
+void InstrProfiling::getOrCreateVTableProfData(GlobalVariable *GV) {
+  assert(!DebugInfoCorrelate &&
+         "Value profiling is not supported with lightweight instrumentation");
+  if (GV->isDeclaration() || GV->hasAvailableExternallyLinkage())
+    return;
+
+  if (GV->getName().starts_with("llvm.") ||
+      GV->getName().starts_with("__llvm") ||
+      GV->getName().starts_with("__prof"))
+    return;
+
+  // VTableProfData already created
+  auto It = VTableDataMap.find(GV);
+  if (It != VTableDataMap.end() && It->second)
+    return;
+
+  GlobalValue::LinkageTypes Linkage = GV->getLinkage();
+  GlobalValue::VisibilityTypes Visibility = GV->getVisibility();
+
+  // This is to keep consistent with per-function profile data
+  // for correctness.
+  if (TT.isOSBinFormatXCOFF()) {
+    Linkage = GlobalValue::InternalLinkage;
+    Visibility = GlobalValue::DefaultVisibility;
+  }
+
+  LLVMContext &Ctx = M->getContext();
+  Type *DataTypes[] = {
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Init) LLVMType,
+#include "llvm/ProfileData/InstrProfData.inc"
+  };
+
+  auto *DataTy = StructType::get(Ctx, ArrayRef(DataTypes));
+
+  // Used by INSTR_PROF_VTABLE_DATA MACRO
+  Constant *VTableAddr = getVTableAddrForProfData(GV);
+  StringRef VTableName = GV->getName();
+  // Record the length of the vtable. This is needed since vtable pointers
+  // loaded from C++ objects might be from the middle of a vtable definition.
+  uint32_t VTableSizeVal =
+      M->getDataLayout().getTypeAllocSize(GV->getValueType());
+
+  Constant *DataVals[] = {
+#define INSTR_PROF_VTABLE_DATA(Type, LLVMType, Name, Init) Init,
+#include "llvm/ProfileData/InstrProfData.inc"
+  };
+
+  auto *Data =
+      new GlobalVariable(*M, DataTy, false /* constant */, Linkage,
+                         ConstantStruct::get(DataTy, DataVals),
+                         getVarName(GV, getInstrProfVTableVarPrefix()));
+
+  Data->setVisibility(Visibility);
+  Data->setSection(getInstrProfSectionName(IPSK_vtab, TT.getObjectFormat()));
+  Data->setAlignment(Align(8));
+
+  const bool NeedComdat = needsComdatForCounter(*GV, *M);
+
+  // GV is the data structure to record vtable information.
+  // Place the global variable for per-vtable profile data in a comdat group
+  // if the associated vtable definition is a COMDAT. This makes sure only one
+  // copy of the variable for the vtable will be emitted after linking.
+  auto MaybeSetComdat = [&](GlobalVariable *GV, StringRef GroupName) {
+    bool UseComdat = (NeedComdat || TT.isOSBinFormatELF());
+    if (UseComdat) {
+      // Create a new comdat group using the name of the global variable as
+      // opposed to using the comdat group of the vtable.
+      Comdat *C = M->getOrInsertComdat(GroupName);
+      // For ELF, when not using COMDAT, put the vtable profile data into a
+      // nodeduplicate COMDAT which is lowered to a zero-flag zero group.
+      // This allows -z -start-top-gc to discard the entire group when the
+      // vtable def is discarded.
+      if (!NeedComdat)
+        C->setSelectionKind(Comdat::NoDeduplicate);
+      GV->setComdat(C);
+      // COFF doesn't allow the comdat group leader to have private linkage, so
+      // upgrade private linkage to internal linkage to produce a symbol table
+      // entry.
+      if (TT.isOSBinFormatCOFF() && GV->hasPrivateLinkage()) {
+        GV->setLinkage(GlobalValue::InternalLinkage);
+      }
+      return;
+    }
+  };
+
+  MaybeSetComdat(Data, Data->getName());
+
+  VTableDataMap[GV] = Data;
+
+  ReferencedVTableNames.push_back(GV);
+
+  // VTable <Hash, Addr> is used by runtime but not referenced by other
+  // sections. Conservatively mark it linker retained.
+  UsedVars.push_back(Data);
+}
+
 GlobalVariable *
 InstrProfiling::getOrCreateRegionCounters(InstrProfInstBase *Inc) {
   GlobalVariable *NamePtr = Inc->getName();
@@ -1264,6 +1401,34 @@ void InstrProfiling::emitNameData() {
     NamePtr->eraseFromParent();
 }
 
+void InstrProfiling::emitVTableNames() {
+  if (ReferencedVTableNames.empty())
+    return;
+
+  // Collect VTable
+  std::string CompressedVTableNames;
+  if (Error E =
+          collectVTableStrings(ReferencedVTableNames, CompressedVTableNames,
+                               DoInstrProfNameCompression)) {
+    report_fatal_error(Twine(toString(std::move(E))), false);
+  }
+
+  auto &Ctx = M->getContext();
+  auto *VTableNamesVal = ConstantDataArray::getString(
+      Ctx, StringRef(CompressedVTableNames), false /* AddNull */);
+  GlobalVariable *VTableNamesVar =
+      new GlobalVariable(*M, VTableNamesVal->getType(), true /* constant */,
+                         GlobalValue::PrivateLinkage, VTableNamesVal,
+                         getInstrProfVTableNamesVarName());
+  VTableNamesVar->setSection(
+      getInstrProfSectionName(IPSK_vname, TT.getObjectFormat()));
+  VTableNamesVar->setAlignment(Align(1));
+  // Make VTableNames linker retained.
+  UsedVars.push_back(VTableNamesVar);
+
+  // FIXME: Why emitNames call erase method?
+}
+
 void InstrProfiling::emitRegistration() {
   if (!needsRuntimeRegistrationOfSectionRange(TT))
     return;
diff --git a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
index 1fe9c57e550a412..3b2c78eebf40d9e 100644
--- a/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
@@ -585,6 +585,7 @@ template <class Edge, class BBInfo> class FuncPGOInstrumentation {
       NumOfPGOMemIntrinsics += ValueSites[IPVK_MemOPSize].size();
       NumOfPGOBB += MST.BBInfos.size();
       ValueSites[IPVK_IndirectCallTarget] = VPC.get(IPVK_IndirectCallTarget);
+      ValueSites[IPVK_VTableTarget] = VPC.get(IPVK_VTableTarget);
     } else {
       NumOfCSPGOSelectInsts += SIVisitor.getNumOfSelectInsts();
       NumOfCSPGOMemIntrinsics += ValueSites[IPVK_MemOPSize].size();
diff --git a/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc b/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
index 3a129de1acd02d6..59d51a59c48b735 100644
--- a/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
+++ b/llvm/lib/Transforms/Instrumentation/ValueProfilePlugins.inc
@@ -90,9 +90,33 @@ public:
   }
 };
 
+///------------------------ VirtualTableValueProfilingPlugin ------------------------
+class VTableProfilingPlugin {
+  Function &F;
+
+public:
+  static constexpr InstrProfValueKind Kind = IPVK_VTableTarget;
+
+  VTableProfilingPlugin(Function &Fn, TargetLibraryInfo &TLI) : F(Fn) {}
+
+  void run(std::vector<CandidateInfo> &Candidates) {
+    std::vector<Instruction *> Result = findVTableAddrs(F);
+    for (Instruction* I : Result) {
+      Instruction* InsertPt = I->getNextNonDebugInstruction();
+      while(InsertPt && dyn_cast<PHINode>(InsertPt))
+        InsertPt = InsertPt->getNextNonDebugInstruction();
+      assert(InsertPt);
+
+      Instruction *AnnotatedInst = I;
+      Candidates.emplace_back(CandidateInfo{I, InsertPt, AnnotatedInst});
+    }
+  }
+};
+
 ///----------------------- Registration of the plugins -------------------------
 /// For now, registering a plugin with the ValueProfileCollector is done by
 /// adding the plugin type to the VP_PLUGIN_LIST macro.
 #define VP_PLUGIN_LIST           \
     MemIntrinsicPlugin,          \
-    IndirectCallPromotionPlugin
+    IndirectCallPromotionPlugin, \
+    VTableProfilingPlugin 
diff --git a/llvm/test/Transforms/PGOProfile/Inputs/update_vtable_value_prof_inputs.sh b/llvm/test/Transforms/PGOProfile/Inputs/update_vtable_value_prof_inputs.sh
new file mode 100644
index 000000000000000..1b35ea0303d15d2
--- /dev/null
+++ b/llvm/test/Transforms/PGOProfile/Inputs/update_vtable_value_prof_inputs.sh
@@ -0,0 +1,84 @@
+#!/bin/bash
+
+if [ $# -lt 2 ]; then
+  echo "Path to clang++ and llvm-profdata required!"
+  echo "Usage: update_vtable_value_prof_inputs.sh /path/to/updated/clang++ /path/to/updated/llvm-profdata"
+  exit 1
+else
+  CLANG=$1
+  LLVMPROFDATA=$2
+fi
+
+OUTDIR=$(dirname $(realpath -s $0))
+
+echo "Outdir is $OUTDIR"
+
+cat > ${OUTDIR}/vtable_prof.cc << EOF
+#include <cstdlib>
+#include <cstdio>
+
+class Base {
+ public:
+  virtual int func1(int a, int b) = 0;
+  virtual int func2(int a, int b) = 0;
+};
+
+class Derived1 : public Base {
+    public:
+    __attribute__((noinline))
+    int func1(int a, int b) override
+    {
+        return a + b;
+    }
+
+    __attribute__((noinline))
+    int func2(int a, int b) override {
+        return a * b;
+    }
+};
+
+class Derived2 : public Base {
+    public:
+    
+    __attribute__((noinline))
+    int func1(int a, int b) override {
+        return a - b;
+    }
+
+    __attribute__((noinline))
+    int func2(int a, int b) override {
+        return a * (a - b);
+    }
+};
+
+__attribute__((noinline)) Base* createType(int a) {
+    Base* base = nullptr;
+    if (a % 4 == 0)
+      base = new Derived1();
+    else
+      base = new Derived2();
+    return base;
+}
+
+
+int main(int argc, char** argv) {
+    int sum = 0;
+    for (int i = 0; i < 1000; i++) {
+        int a = rand();
+        int b = rand();
+        Base* ptr = createType(i);
+        sum += ptr->func1(a, b) + ptr->func2(b, a);
+    }
+    printf("sum is %d\n", sum);
+    return 0;
+}
+EOF
+
+FLAGS="-fuse-ld=lld -O2 -g -fprofile-generate=. -flto=thin -Xclang -fwhole-program-vtables -Wl,--lto-whole-program-visibility"
+
+${CLANG} ${FLAGS} ${OUTDIR}/vtable_prof.cc -o ${OUTDIR}/vtable_prof
+env LLVM_PROFILE_FILE=${OUTDIR}/vtable_prof.profraw ${OUTDIR}/vtable_prof
+
+rm ${OUTDIR}/vtable_prof
+rm ${OUTDIR}/vtable_prof.cc
+
diff --git a/llvm/test/Transforms/PGOProfile/comdat_internal.ll b/llvm/test/Transforms/PGOProfile/comdat_internal.ll
index 1c44a274f3c0471..990b246ce07a8c1 100644
--- a/llvm/test/Transforms/PGOProfile/comdat_internal.ll
+++ b/llvm/test/Transforms/PGOProfile/comdat_internal.ll
@@ -13,9 +13,9 @@ $foo = comdat any
 ; CHECK: @__llvm_profile_raw_version = hidden constant i64 {{[0-9]+}}, comdat
 ; CHECK-NOT: __profn__stdin__foo
 ; CHECK: @__profc__stdin__foo.[[#FOO_HASH]] = private global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", comdat, align 8
-; CHECK: @__profd__stdin__foo.[[#FOO_HASH]] = private global { i64, i64, i64, ptr, ptr, i32, [2 x i16] } { i64 {{.*}}, i64 [[#FOO_HASH]], i64 sub (i64 ptrtoint (ptr @__profc__stdin__foo.742261418966908927 to i64), i64 ptrtoint (ptr @__profd__stdin__foo.742261418966908927 to i64)), ptr null
+; CHECK: @__profd__stdin__foo.[[#FOO_HASH]] = private global { i64, i64, i64, ptr, ptr, i32, [3 x i16] } { i64 {{.*}}, i64 [[#FOO_HASH]], i64 sub (i64 ptrtoint (ptr @__profc__stdin__foo.742261418966908927 to i64), i64 ptrtoint (ptr @__profd__stdin__foo.742261418966908927 to i64)), ptr null
 ; CHECK-NOT: @foo
-; CHECK-SAME: , ptr null, i32 1, [2 x i16] zeroinitializer }, section "__llvm_prf_data", comdat($__profc__stdin__foo.[[#FOO_HASH]]), align 8
+; CHECK-SAME: , ptr null, i32 1, [3 x i16] zeroinitializer }, section "__llvm_prf_data", comdat($__profc__stdin__foo.[[#FOO_HASH]]), align 8
 ; CHECK: @__llvm_prf_nm
 ; CHECK: @llvm.compiler.used
 
diff --git a/llvm/test/Transforms/PGOProfile/indirect_call_profile_funclet.ll b/llvm/test/Transforms/PGOProfile/indirect_call_profile_funclet.ll
index 42018e4d5e54dd2..63173ab59b28ba2 100644
--- a/llvm/test/Transforms/PGOProfile/indirect_call_profile_funclet.ll
+++ b/llvm/test/Transforms/PGOProfile/indirect_call_profile_funclet.ll
@@ -54,11 +54,12 @@ try.cont:                                         ; preds = %catch, %entry
 }
 
 ; GEN: catch:
-; GEN: call void @llvm.instrprof.value.profile(
+; GEN: call void @llvm.instrprof.value.profile({{.*}} i32 2, i32 0)
+; GEN: call void @llvm.instrprof.value.profile({{.*}} i32 0, i32 0)
 ; GEN-SAME: [ "funclet"(token %tmp1) ]
 
 ; LOWER: catch:
-; LOWER: call void @__llvm_profile_instrument_target(
+; LOWER: call void @__llvm_profile_instrument_target({{.*}} i32 0)
 ; LOWER-SAME: [ "funclet"(token %tmp1) ]
 
 declare dso_local void @"?may_throw@@YAXH at Z"(i32)
diff --git a/llvm/test/Transforms/PGOProfile/vtable_profile.ll b/llvm/test/Transforms/PGOProfile/vtable_profile.ll
new file mode 100644
index 000000000000000..0c6bd3c064d35fc
--- /dev/null
+++ b/llvm/test/Transforms/PGOProfile/vtable_profile.ll
@@ -0,0 +1,139 @@
+; RUN: opt < %s -passes=pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
+; RUN: opt < %s -passes=pgo-instr-gen,instrprof -S | FileCheck %s --check-prefix=LOWER
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+$_ZTV7Derived = comdat any
+
+ at _ZTV7Derived = constant { [3 x ptr], [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI7Derived, ptr @_ZN5Base15func1Eii], [3 x ptr] [ptr inttoptr (i64 -8 to ptr), ptr @_ZTI7Derived, ptr @_ZN5Base25func2Eii] }, comdat, align 8, !type !0, !type !1, !type !2, !type !3, !type !4, !type !5, !type !6, !type !7, !type !8
+ at _ZTVN10__cxxabiv121__vmi_class_type_infoE = external global [0 x ptr]
+ at _ZTS7Derived = constant [9 x i8] c"7Derived\00", align 1
+ at _ZTI5Base1 = external constant ptr
+ at _ZTI5Base2 = external constant ptr
+ at _ZTI7Derived =  constant { ptr, ptr, i32, i32, ptr, i64, ptr, i64 } { ptr getelementptr inbounds (ptr, ptr @_ZTVN10__cxxabiv121__vmi_class_type_infoE, i64 2), ptr @_ZTS7Derived, i32 0, i32 2, ptr @_ZTI5Base1, i64 2, ptr @_ZTI5Base2, i64 2050 }, align 8
+ at _ZTV5Base1 = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI5Base1, ptr @_ZN5Base15func1Eii] }, align 8, !type !0, !type !1
+ at _ZTV5Base2 = constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI5Base2, ptr @_ZN5Base25func2Eii] }, align 8, !type !9, !type !4
+ at llvm.compiler.used = appending global [2 x ptr] [ptr @_ZTV5Base1, ptr @_ZTV5Base2], section "llvm.metadata"
+
+declare ptr @_Z10createTypei(i32)
+declare i32 @_ZN5Base15func1Eii(ptr, i32, i32)
+declare i32 @_ZN5Base25func2Eii(ptr, i32, i32)
+
+; GEN: @__llvm_profile_raw_version = hidden constant i64 72057594037927945, comdat
+; GEN: @__profn_test_vtable_value_profiling = private constant [27 x i8] c"test_vtable_value_profiling"
+
+; LOWER: $__profvt__ZTV7Derived = comdat any
+; LOWER: $__profvt__ZTV5Base1 = comdat nodeduplicate
+; LOWER: $__profvt__ZTV5Base2 = comdat nodeduplicate
+; LOWER: @__llvm_profile_raw_version = hidden constant i64 72057594037927945, comdat
+; LOWER: @__profc_test_vtable_value_profiling = private global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", comdat, align 8
+; LOWER: @__profvp_test_vtable_value_profiling = private global [4 x i64] zeroinitializer, section "__llvm_prf_vals", comdat($__profc_test_vtable_value_profiling), align 8
+; LOWER: @__profd_test_vtable_value_profiling = private global { i64, i64, i64, ptr, ptr, i32, [3 x i16] } { i64 1593873508557585901, i64 567090795815895039, i64 sub (i64 ptrtoint (ptr @__profc_test_vtable_value_profiling to i64), i64 ptrtoint (ptr @__profd_test_vtable_value_profiling to i64)), ptr @test_vtable_value_profiling.local, ptr @__profvp_test_vtable_value_profiling, i32 1, [3 x i16] [i16 2, i16 0, i16 2] }, section "__llvm_prf_data", comdat($__profc_test_vtable_value_profiling), align 8
+; LOWER: @__profvt__ZTV7Derived = global { i64, ptr, i32 } { i64 -4576307468236080025, ptr @_ZTV7Derived, i32 48 }, section "__llvm_prf_vtab", comdat, align 8
+; LOWER: @__profvt__ZTV5Base1 = global { i64, ptr, i32 } { i64 3215870116411581797, ptr @_ZTV5Base1, i32 24 }, section "__llvm_prf_vtab", comdat, align 8
+; LOWER: @__profvt__ZTV5Base2 = global { i64, ptr, i32 } { i64 8378219803387680050, ptr @_ZTV5Base2, i32 24 }, section "__llvm_prf_vtab", comdat, align 8
+; LOWER: @__llvm_prf_vnodes = private global [10 x { i64, i64, ptr }] zeroinitializer, section "__llvm_prf_vnds", align 8
+; LOWER: @__llvm_prf_nm = private constant [37 x i8] c"\1B#x\DA+I-.\89/+IL\CAI\8D/K\CC)M\8D/(\CAO\CB\CC\C9\CCK\07\00\9Ea\0BC", section "__llvm_prf_names", align 1
+; LOWER: @__llvm_prf_vnm = private constant [34 x i8] c"\22 x\DA\8B\8F\0A\093wI-\CA,KMa\8C\07rL\9D\12\8BS\0D\11L#\00\C3\A2\0A\E9", section "__llvm_prf_vnames", align 1
+; LOWER: @llvm.used = appending global [6 x ptr] [ptr @__profvt__ZTV7Derived, ptr @__profvt__ZTV5Base1, ptr @__profvt__ZTV5Base2, ptr @__llvm_prf_vnodes, ptr @__llvm_prf_nm, ptr @__llvm_prf_vnm], section "llvm.metadata"
+
+define i32 @test_vtable_value_profiling(i32 %a, i32 %b, i32 %c) {
+; GEN-LABEL: define i32 @test_vtable_value_profiling(
+; GEN-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i32 [[C:%.*]]) {
+; GEN-NEXT:  entry:
+; GEN-NEXT:    call void @llvm.instrprof.increment(ptr @__profn_test_vtable_value_profiling, i64 567090795815895039, i32 1, i32 0)
+; GEN-NEXT:    [[CALL:%.*]] = tail call ptr @_Z10createTypei(i32 [[C]])
+; GEN-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[CALL]], i64 8
+; GEN-NEXT:    [[VTABLE:%.*]] = load ptr, ptr [[ADD_PTR]], align 8
+; GEN-NEXT:    [[TMP0:%.*]] = ptrtoint ptr [[VTABLE]] to i64
+; GEN-NEXT:    call void @llvm.instrprof.value.profile(ptr @__profn_test_vtable_value_profiling, i64 567090795815895039, i64 [[TMP0]], i32 2, i32 0)
+; GEN-NEXT:    [[VFUNC:%.*]] = load ptr, ptr [[VTABLE]], align 8
+; GEN-NEXT:    [[TMP1:%.*]] = ptrtoint ptr [[VFUNC]] to i64
+; GEN-NEXT:    call void @llvm.instrprof.value.profile(ptr @__profn_test_vtable_value_profiling, i64 567090795815895039, i64 [[TMP1]], i32 0, i32 0)
+; GEN-NEXT:    [[CALL1:%.*]] = tail call i32 [[VFUNC]](ptr [[ADD_PTR]], i32 [[A]], i32 [[B]])
+; GEN-NEXT:    [[VTABLE2:%.*]] = load ptr, ptr [[CALL]], align 8
+; GEN-NEXT:    [[TMP2:%.*]] = ptrtoint ptr [[VTABLE2]] to i64
+; GEN-NEXT:    call void @llvm.instrprof.value.profile(ptr @__profn_test_vtable_value_profiling, i64 567090795815895039, i64 [[TMP2]], i32 2, i32 1)
+; GEN-NEXT:    [[VFUNC2:%.*]] = load ptr, ptr [[VTABLE2]], align 8
+; GEN-NEXT:    [[TMP3:%.*]] = ptrtoint ptr [[VFUNC2]] to i64
+; GEN-NEXT:    call void @llvm.instrprof.value.profile(ptr @__profn_test_vtable_value_profiling, i64 567090795815895039, i64 [[TMP3]], i32 0, i32 1)
+; GEN-NEXT:    [[CALL4:%.*]] = tail call i32 [[VFUNC2]](ptr [[CALL]], i32 [[B]], i32 [[A]])
+; GEN-NEXT:    [[ADD:%.*]] = add nsw i32 [[CALL4]], [[CALL1]]
+; GEN-NEXT:    ret i32 [[ADD]]
+;
+; LOWER-LABEL: define i32 @test_vtable_value_profiling(
+; LOWER-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i32 [[C:%.*]]) {
+; LOWER-NEXT:  entry:
+; LOWER-NEXT:    [[PGOCOUNT:%.*]] = load i64, ptr @__profc_test_vtable_value_profiling, align 8
+; LOWER-NEXT:    [[TMP0:%.*]] = add i64 [[PGOCOUNT]], 1
+; LOWER-NEXT:    store i64 [[TMP0]], ptr @__profc_test_vtable_value_profiling, align 8
+; LOWER-NEXT:    [[CALL:%.*]] = tail call ptr @_Z10createTypei(i32 [[C]])
+; LOWER-NEXT:    [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[CALL]], i64 8
+; LOWER-NEXT:    [[VTABLE:%.*]] = load ptr, ptr [[ADD_PTR]], align 8
+; LOWER-NEXT:    [[TMP1:%.*]] = ptrtoint ptr [[VTABLE]] to i64
+; LOWER-NEXT:    call void @__llvm_profile_instrument_target(i64 [[TMP1]], ptr @__profd_test_vtable_value_profiling, i32 2)
+; LOWER-NEXT:    [[VFUNC:%.*]] = load ptr, ptr [[VTABLE]], align 8
+; LOWER-NEXT:    [[TMP2:%.*]] = ptrtoint ptr [[VFUNC]] to i64
+; LOWER-NEXT:    call void @__llvm_profile_instrument_target(i64 [[TMP2]], ptr @__profd_test_vtable_value_profiling, i32 0)
+; LOWER-NEXT:    [[CALL1:%.*]] = tail call i32 [[VFUNC]](ptr [[ADD_PTR]], i32 [[A]], i32 [[B]])
+; LOWER-NEXT:    [[VTABLE2:%.*]] = load ptr, ptr [[CALL]], align 8
+; LOWER-NEXT:    [[TMP3:%.*]] = ptrtoint ptr [[VTABLE2]] to i64
+; LOWER-NEXT:    call void @__llvm_profile_instrument_target(i64 [[TMP3]], ptr @__profd_test_vtable_value_profiling, i32 3)
+; LOWER-NEXT:    [[VFUNC2:%.*]] = load ptr, ptr [[VTABLE2]], align 8
+; LOWER-NEXT:    [[TMP4:%.*]] = ptrtoint ptr [[VFUNC2]] to i64
+; LOWER-NEXT:    call void @__llvm_profile_instrument_target(i64 [[TMP4]], ptr @__profd_test_vtable_value_profiling, i32 1)
+; LOWER-NEXT:    [[CALL4:%.*]] = tail call i32 [[VFUNC2]](ptr [[CALL]], i32 [[B]], i32 [[A]])
+; LOWER-NEXT:    [[ADD:%.*]] = add nsw i32 [[CALL4]], [[CALL1]]
+; LOWER-NEXT:    ret i32 [[ADD]]
+;
+entry:
+  %call = tail call ptr @_Z10createTypei(i32 %c)
+  %add.ptr = getelementptr inbounds i8, ptr %call, i64 8
+  %vtable = load ptr, ptr %add.ptr, align 8
+  %vfunc = load ptr, ptr %vtable, align 8
+  %call1 = tail call i32 %vfunc(ptr %add.ptr, i32 %a, i32 %b)
+  %vtable2 = load ptr, ptr %call, align 8
+  %vfunc2 = load ptr, ptr %vtable2, align 8
+  %call4 = tail call i32 %vfunc2(ptr %call, i32 %b, i32 %a)
+  %add = add nsw i32 %call4, %call1
+  ret i32 %add
+}
+
+!0 = !{i64 16, !"_ZTS5Base1"}
+!1 = !{i64 16, !"_ZTSM5Base1FiiiE.virtual"}
+!2 = !{i64 40, !"_ZTSM5Base1FiiiE.virtual"}
+!3 = !{i64 40, !"_ZTS5Base2"}
+!4 = !{i64 16, !"_ZTSM5Base2FiiiE.virtual"}
+!5 = !{i64 40, !"_ZTSM5Base2FiiiE.virtual"}
+!6 = !{i64 16, !"_ZTS7Derived"}
+!7 = !{i64 16, !"_ZTSM7DerivedFiiiE.virtual"}
+!8 = !{i64 40, !"_ZTSM7DerivedFiiiE.virtual"}
+!9 = !{i64 16, !"_ZTS5Base2"}
+;.
+; GEN: attributes #[[ATTR0:[0-9]+]] = { nounwind }
+;.
+; LOWER: attributes #[[ATTR0:[0-9]+]] = { nounwind }
+;.
+; GEN: [[META0:![0-9]+]] = !{i64 16, !"_ZTS5Base1"}
+; GEN: [[META1:![0-9]+]] = !{i64 16, !"_ZTSM5Base1FiiiE.virtual"}
+; GEN: [[META2:![0-9]+]] = !{i64 40, !"_ZTSM5Base1FiiiE.virtual"}
+; GEN: [[META3:![0-9]+]] = !{i64 40, !"_ZTS5Base2"}
+; GEN: [[META4:![0-9]+]] = !{i64 16, !"_ZTSM5Base2FiiiE.virtual"}
+; GEN: [[META5:![0-9]+]] = !{i64 40, !"_ZTSM5Base2FiiiE.virtual"}
+; GEN: [[META6:![0-9]+]] = !{i64 16, !"_ZTS7Derived"}
+; GEN: [[META7:![0-9]+]] = !{i64 16, !"_ZTSM7DerivedFiiiE.virtual"}
+; GEN: [[META8:![0-9]+]] = !{i64 40, !"_ZTSM7DerivedFiiiE.virtual"}
+; GEN: [[META9:![0-9]+]] = !{i64 16, !"_ZTS5Base2"}
+;.
+; LOWER: [[META0:![0-9]+]] = !{i64 16, !"_ZTS5Base1"}
+; LOWER: [[META1:![0-9]+]] = !{i64 16, !"_ZTSM5Base1FiiiE.virtual"}
+; LOWER: [[META2:![0-9]+]] = !{i64 40, !"_ZTSM5Base1FiiiE.virtual"}
+; LOWER: [[META3:![0-9]+]] = !{i64 40, !"_ZTS5Base2"}
+; LOWER: [[META4:![0-9]+]] = !{i64 16, !"_ZTSM5Base2FiiiE.virtual"}
+; LOWER: [[META5:![0-9]+]] = !{i64 40, !"_ZTSM5Base2FiiiE.virtual"}
+; LOWER: [[META6:![0-9]+]] = !{i64 16, !"_ZTS7Derived"}
+; LOWER: [[META7:![0-9]+]] = !{i64 16, !"_ZTSM7DerivedFiiiE.virtual"}
+; LOWER: [[META8:![0-9]+]] = !{i64 40, !"_ZTSM7DerivedFiiiE.virtual"}
+; LOWER: [[META9:![0-9]+]] = !{i64 16, !"_ZTS5Base2"}
+;.
diff --git a/llvm/test/tools/llvm-profdata/Inputs/c-general.profraw b/llvm/test/tools/llvm-profdata/Inputs/c-general.profraw
index bc8fc5db1cb154d98ca962e84313463e3298cb92..a065c4dd7b9ce20f631c1228147c97dc46dae8bb 100644
GIT binary patch
delta 184
zcmeC+`@zTASd^AuRFLzZb0Vib$GLNibNIp-7$!F`Nlc6|nB2g^F|k8{QDNdtc}9kb
z8^sv|CY}Vb9*Q$2O#BICO%`MnXS^|4lM%#r1hOqAM}pafKz7IEPB42Rqd3!nzY}N4
z0o7b&6zBZ#_dgggOg_jgKbeC`fa${DiCJ<W+a_Bu32^R!%NGLWGnfQ`CRH-YPmW*`
K*t~!#g9QKz%0Qq1

delta 226
zcmeyt*TKixSd^AuRFLzZV<M+LCwGqn0|+oqOf(m4Udy`lqjO(I&}GvIF&jY_jforO
zC*BZXOqjS)d=evvVCa+zP1gCUanf@<V@;ADUZ|L?$S6PAgHeF-2T;Z20-zFmUzxmw
zcE{>#|HF2)MP+VFm^=}vWCu{m4j at Z>@&llnuTyPVyaQr|<1ZS8=|7iS^J6k2ll){2
zCIKdcf0M14<b-NpJU>z}?X}aSS0831wSTCP_&2diZt at JE0*-%^S24*6MxEwya$o3I
Va?uU!c!md)A2P{r=3p*h0RV;ZQW5|F

diff --git a/llvm/test/tools/llvm-profdata/Inputs/vtable-prof.proftext b/llvm/test/tools/llvm-profdata/Inputs/vtable-prof.proftext
new file mode 100644
index 000000000000000..bf0ad6beb9825b8
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/vtable-prof.proftext
@@ -0,0 +1,73 @@
+# IR level Instrumentation Flag
+:ir
+_Z10createTypei
+# Func Hash:
+146835647075900052
+# Num Counters:
+2
+# Counter Values:
+750
+250
+
+_ZN8Derived15func1Eii
+# Func Hash:
+742261418966908927
+# Num Counters:
+1
+# Counter Values:
+250
+
+_ZN8Derived15func2Eii
+# Func Hash:
+742261418966908927
+# Num Counters:
+1
+# Counter Values:
+250
+
+_ZN8Derived25func1Eii
+# Func Hash:
+742261418966908927
+# Num Counters:
+1
+# Counter Values:
+750
+
+_ZN8Derived25func2Eii
+# Func Hash:
+742261418966908927
+# Num Counters:
+1
+# Counter Values:
+750
+
+main
+# Func Hash:
+1124236338992350536
+# Num Counters:
+2
+# Counter Values:
+1000
+1
+# Num Value Kinds:
+2
+# ValueKind = IPVK_IndirectCallTarget:
+0
+# NumValueSites:
+2
+2
+_ZN8Derived25func1Eii:750
+_ZN8Derived15func1Eii:250
+2
+_ZN8Derived25func2Eii:750
+_ZN8Derived15func2Eii:250
+# ValueKind = IPVK_VTableTarget:
+2
+# NumValueSites:
+2
+2
+_ZTV8Derived2:750
+_ZTV8Derived1:250
+2
+_ZTV8Derived2:750
+_ZTV8Derived1:250
\ No newline at end of file
diff --git a/llvm/test/tools/llvm-profdata/Inputs/vtable_prof.profraw b/llvm/test/tools/llvm-profdata/Inputs/vtable_prof.profraw
new file mode 100644
index 0000000000000000000000000000000000000000..bc52463abfb388a4bb7873ebc503726d0ef78ccd
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/llvm/test/tools/llvm-profdata/binary-ids-padding.test b/llvm/test/tools/llvm-profdata/binary-ids-padding.test
index 67db5c98ef323a7..891aac0be4c6033 100644
--- a/llvm/test/tools/llvm-profdata/binary-ids-padding.test
+++ b/llvm/test/tools/llvm-profdata/binary-ids-padding.test
@@ -8,10 +8,12 @@
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 // INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta, (uintptr_t)CountersBegin)
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 // INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 // There will be 2 20-byte binary IDs, so the total Binary IDs size will be 64 bytes.
 //   2 * 8  binary ID sizes
 // + 2 * 20 binary IDs (of size 20)
@@ -27,6 +29,8 @@ RUN: printf '\20\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\2\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Binary IDs - There are only two in this case that are 20 bytes.
 RUN: printf '\24\0\0\0\0\0\0\0' >> %t.profraw
@@ -52,13 +56,15 @@ RUN: printf '\0\0\4\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 RUN: printf '\067\265\035\031\112\165\023\344' >> %t.profraw
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
-RUN: printf '\xd8\xff\3\0\1\0\0\0' >> %t.profraw
+RUN: printf '\xd0\xff\3\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 RUN: printf '\023\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\067\0\0\0\0\0\0\0' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/large-binary-id-size.test b/llvm/test/tools/llvm-profdata/large-binary-id-size.test
index 2394431e94de482..3362186e1011583 100644
--- a/llvm/test/tools/llvm-profdata/large-binary-id-size.test
+++ b/llvm/test/tools/llvm-profdata/large-binary-id-size.test
@@ -1,5 +1,5 @@
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\40\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
@@ -9,6 +9,8 @@ RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Check for a corrupted size being too large past the end of the file.
 RUN: printf '\7\7\7\7\7\7\7\7' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/malformed-not-space-for-another-header.test b/llvm/test/tools/llvm-profdata/malformed-not-space-for-another-header.test
index 06f418d0235d260..bfcf91a36f9403d 100644
--- a/llvm/test/tools/llvm-profdata/malformed-not-space-for-another-header.test
+++ b/llvm/test/tools/llvm-profdata/malformed-not-space-for-another-header.test
@@ -8,10 +8,12 @@
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 // INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta, (uintptr_t)CountersBegin)
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 // INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
@@ -21,6 +23,8 @@ RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\2\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Data Section
 //
@@ -36,6 +40,7 @@ RUN: printf '\0\0\4\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 RUN: printf '\023\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\3\0foo\0\0\0' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/malformed-num-counters-zero.test b/llvm/test/tools/llvm-profdata/malformed-num-counters-zero.test
index b718cf0fd8e9723..70ddca3dfd7de07 100644
--- a/llvm/test/tools/llvm-profdata/malformed-num-counters-zero.test
+++ b/llvm/test/tools/llvm-profdata/malformed-num-counters-zero.test
@@ -8,10 +8,12 @@
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 // INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta, (uintptr_t)CountersBegin)
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 // INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
@@ -21,6 +23,8 @@ RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\4\0\2\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Data Section
 //
@@ -37,6 +41,7 @@ RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 // Make NumCounters = 0 so that we get "number of counters is zero" error message
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 RUN: printf '\023\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\3\0foo\0\0\0' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test b/llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
index 38e40334a6a690d..54f861e08970da1 100644
--- a/llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
+++ b/llvm/test/tools/llvm-profdata/malformed-ptr-to-counter-array.test
@@ -8,10 +8,12 @@
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesSize,  NamesSize)
 // INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta, (uintptr_t)CountersBegin)
 // INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
+// INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
+// INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
 // INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
@@ -21,6 +23,8 @@ RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\6\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\6\0\2\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Data Section
 //
@@ -42,6 +46,7 @@ RUN: printf '\11\0\6\0\1\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Counter Section
 
diff --git a/llvm/test/tools/llvm-profdata/misaligned-binary-ids-size.test b/llvm/test/tools/llvm-profdata/misaligned-binary-ids-size.test
index 171b5cc60878f4c..489e06468ac7d82 100644
--- a/llvm/test/tools/llvm-profdata/misaligned-binary-ids-size.test
+++ b/llvm/test/tools/llvm-profdata/misaligned-binary-ids-size.test
@@ -1,5 +1,5 @@
 RUN: printf '\201rforpl\377' > %t.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t.profraw
 // We should fail on this because the binary IDs is not a multiple of 8 bytes.
 RUN: printf '\77\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
@@ -10,6 +10,8 @@ RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t.profraw
 
 // Binary IDs - There are only two in this case that are 20 bytes.
 RUN: printf '\24\0\0\0\0\0\0\0' >> %t.profraw
diff --git a/llvm/test/tools/llvm-profdata/mismatched-raw-profile-header.test b/llvm/test/tools/llvm-profdata/mismatched-raw-profile-header.test
index 24f3f563e9689d6..0c9c046682ded84 100644
--- a/llvm/test/tools/llvm-profdata/mismatched-raw-profile-header.test
+++ b/llvm/test/tools/llvm-profdata/mismatched-raw-profile-header.test
@@ -12,6 +12,8 @@ RUN: printf '\0\0\0\0\0\0\0\20' >> %t
 RUN: printf '\0\0\0\1\0\4\0\0' >> %t
 RUN: printf '\0\0\0\2\0\4\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
 RUN: not llvm-profdata show %t -o /dev/null 2>&1 | FileCheck %s
 
diff --git a/llvm/test/tools/llvm-profdata/raw-32-bits-be.test b/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
index c8e862009ef0284..f7ded4b2ed82497 100644
--- a/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
+++ b/llvm/test/tools/llvm-profdata/raw-32-bits-be.test
@@ -1,5 +1,6 @@
+// Header
 RUN: printf '\377lprofR\201' > %t
-RUN: printf '\0\0\0\0\0\0\0\10' >> %t
+RUN: printf '\0\0\0\0\0\0\0\11' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\2' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
@@ -9,6 +10,10 @@ RUN: printf '\0\0\0\0\0\0\0\20' >> %t
 RUN: printf '\0\0\0\0\1\0\0\0' >> %t
 RUN: printf '\0\0\0\0\2\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumVTables
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// ValueKindLast
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
 RUN: printf '\134\370\302\114\333\030\275\254' >> %t
 RUN: printf '\0\0\0\0\0\0\0\1' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-32-bits-le.test b/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
index 523ff1ceb4807a3..2d95f5ba9cbd979 100644
--- a/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
+++ b/llvm/test/tools/llvm-profdata/raw-32-bits-le.test
@@ -1,5 +1,5 @@
 RUN: printf '\201Rforpl\377' > %t
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\2\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
@@ -9,6 +9,10 @@ RUN: printf '\20\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\1\0\0\0\0' >> %t
 RUN: printf '\0\0\0\2\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumVTables
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// ValueKindLast
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
 RUN: printf '\254\275\030\333\114\302\370\134' >> %t
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-64-bits-be.test b/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
index b2b8b31dafbf5ac..05ca0cf98d7beb2 100644
--- a/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
+++ b/llvm/test/tools/llvm-profdata/raw-64-bits-be.test
@@ -1,5 +1,6 @@
+// Header
 RUN: printf '\377lprofr\201' > %t
-RUN: printf '\0\0\0\0\0\0\0\10' >> %t
+RUN: printf '\0\0\0\0\0\0\0\11' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\2' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
@@ -9,20 +10,28 @@ RUN: printf '\0\0\0\0\0\0\0\20' >> %t
 RUN: printf '\0\0\0\1\0\4\0\0' >> %t
 RUN: printf '\0\0\0\2\0\4\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumVTables
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// ValueKindLast
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
+// InstrProfData
 RUN: printf '\134\370\302\114\333\030\275\254' >> %t
 RUN: printf '\0\0\0\0\0\0\0\1' >> %t
 RUN: printf '\0\0\0\1\0\4\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\1\0\0\0\0' >> %t
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
+// InstrProfData
 RUN: printf '\344\023\165\112\031\035\265\067' >> %t
 RUN: printf '\0\0\0\0\0\0\0\02' >> %t
-RUN: printf '\0\0\0\1\0\3\xff\xd8' >> %t
+RUN: printf '\0\0\0\1\0\3\xff\xd0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\02\0\0\0\0' >> %t
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
 RUN: printf '\0\0\0\0\0\0\0\023' >> %t
 RUN: printf '\0\0\0\0\0\0\0\067' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-64-bits-le.test b/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
index 4e95798bc0afbda..d8e12ef705a2582 100644
--- a/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
+++ b/llvm/test/tools/llvm-profdata/raw-64-bits-le.test
@@ -1,28 +1,53 @@
 RUN: printf '\201rforpl\377' > %t
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t
+// Version
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t
+// BinaryIdsSize
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumData
 RUN: printf '\2\0\0\0\0\0\0\0' >> %t
+// PaddingBytesBeforeCounters
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumCounters
 RUN: printf '\3\0\0\0\0\0\0\0' >> %t
+// PaddingBytesAfterCounters
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NamesSize
 RUN: printf '\20\0\0\0\0\0\0\0' >> %t
+// CountersDelta
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t
+// NamesDelta
 RUN: printf '\0\0\4\0\2\0\0\0' >> %t
+// VNamesSize
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumVTables
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// ValueKindLast
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
+// InstrProfData
+// NameRef
 RUN: printf '\254\275\030\333\114\302\370\134' >> %t
+// FuncHash
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t
+// RelativeCounterPtr
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t
+// FunctionPointer
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// Values
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
+// NumCounters + Int16ArrayTy
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t
+// Int16ArrayTy + padding
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
+// InstrProfData
 RUN: printf '\067\265\035\031\112\165\023\344' >> %t
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t
-RUN: printf '\xd8\xff\3\0\1\0\0\0' >> %t
+RUN: printf '\xd0\xff\3\0\1\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t
 
 RUN: printf '\023\0\0\0\0\0\0\0' >> %t
 RUN: printf '\067\0\0\0\0\0\0\0' >> %t
diff --git a/llvm/test/tools/llvm-profdata/raw-two-profiles.test b/llvm/test/tools/llvm-profdata/raw-two-profiles.test
index 8d46c91e2732cd9..5038b6af9232d39 100644
--- a/llvm/test/tools/llvm-profdata/raw-two-profiles.test
+++ b/llvm/test/tools/llvm-profdata/raw-two-profiles.test
@@ -1,5 +1,5 @@
 RUN: printf '\201rforpl\377' > %t-foo.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t-foo.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
@@ -9,6 +9,8 @@ RUN: printf '\10\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\4\0\1\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\4\0\2\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
 
 RUN: printf '\254\275\030\333\114\302\370\134' >> %t-foo.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t-foo.profraw
@@ -16,12 +18,13 @@ RUN: printf '\0\0\4\0\1\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t-foo.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-foo.profraw
 
 RUN: printf '\023\0\0\0\0\0\0\0' >> %t-foo.profraw
 RUN: printf '\3\0foo\0\0\0' >> %t-foo.profraw
 
 RUN: printf '\201rforpl\377' > %t-bar.profraw
-RUN: printf '\10\0\0\0\0\0\0\0' >> %t-bar.profraw
+RUN: printf '\11\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\1\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
@@ -31,6 +34,8 @@ RUN: printf '\10\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\6\0\1\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\6\0\2\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
 
 RUN: printf '\067\265\035\031\112\165\023\344' >> %t-bar.profraw
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t-bar.profraw
@@ -38,6 +43,7 @@ RUN: printf '\0\0\6\0\1\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\02\0\0\0\0\0\0\0' >> %t-bar.profraw
+RUN: printf '\0\0\0\0\0\0\0\0' >> %t-bar.profraw
 
 RUN: printf '\067\0\0\0\0\0\0\0' >> %t-bar.profraw
 RUN: printf '\101\0\0\0\0\0\0\0' >> %t-bar.profraw
diff --git a/llvm/test/tools/llvm-profdata/vtable-prof.proftext b/llvm/test/tools/llvm-profdata/vtable-prof.proftext
new file mode 100644
index 000000000000000..6ebe9b44266b6f2
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/vtable-prof.proftext
@@ -0,0 +1,16 @@
+RUN: llvm-profdata show --function=main --show-vtables %p/Inputs/vtable-prof.proftext | FileCheck %s --check-prefix=VTABLE
+
+VTABLE: Counters:
+VTABLE:  main:
+VTABLE:    Hash: 0x0f9a16fe6d398548
+VTABLE:    Counters: 2
+VTABLE:    VTable Results:
+VTABLE:	       [  0, _ZTV8Derived2,        750 ] (75.00%)
+VTABLE:	       [  0, _ZTV8Derived1,        250 ] (25.00%)
+VTABLE:	       [  1, _ZTV8Derived2,        750 ] (75.00%)
+VTABLE:	       [  1, _ZTV8Derived1,        250 ] (25.00%)
+VTABLE: Instrumentation level: IR  entry_first = 0
+VTABLE: Functions shown: 1
+VTABLE: Total functions: 6
+VTABLE: Maximum function count: 1000
+VTABLE: Maximum internal block count: 250
\ No newline at end of file
diff --git a/llvm/test/tools/llvm-profdata/vtable-value-prof-basic.test b/llvm/test/tools/llvm-profdata/vtable-value-prof-basic.test
new file mode 100644
index 000000000000000..9dd7fa288969075
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/vtable-value-prof-basic.test
@@ -0,0 +1,100 @@
+To update the inputs used below, run Inputs/update_vtable_value_prof_inputs.sh /path/to/updated/clang++ /path/to/updated/llvm-profdata
+
+Show profile data from raw profiles.
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables %p/Inputs/vtable_prof.profraw | FileCheck %s --check-prefix=RAW
+
+Generate indexed profile from raw profile and show the data.
+RUN: llvm-profdata merge %p/Inputs/vtable_prof.profraw -o %t_indexed.profdata
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables %t_indexed.profdata | FileCheck %s --check-prefix=INDEXED
+
+Generate text profile from raw profile and show the data.
+RUN: llvm-profdata merge --text %p/Inputs/vtable_prof.profraw -o %t.proftext
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables --text %t.proftext | FileCheck %s --check-prefix=ICTEXT 
+
+RAW: Counters:
+RAW-NEXT:  main:
+RAW-NEXT:  Hash: 0x0f9a16fe6d398548
+RAW-NEXT:  Counters: 2
+RAW-NEXT:  Indirect Call Site Count: 2
+RAW-NEXT:  VTable Results:
+RAW-NEXT:	     [  0, _ZTV8Derived1,        250 ] (25.00%)
+RAW-NEXT:      [  0, _ZTV8Derived2,        750 ] (75.00%)
+RAW-NEXT:      [  1, _ZTV8Derived1,        250 ] (25.00%)
+RAW-NEXT:	     [  1, _ZTV8Derived2,        750 ] (75.00%)
+RAW-NEXT:  Indirect Target Results:
+RAW-NEXT:	     [  0, _ZN8Derived15func1Eii,        250 ] (25.00%)
+RAW-NEXT:	     [  0, _ZN8Derived25func1Eii,        750 ] (75.00%)
+RAW-NEXT:	     [  1, _ZN8Derived15func2Eii,        250 ] (25.00%)
+RAW-NEXT:	     [  1, _ZN8Derived25func2Eii,        750 ] (75.00%)
+RAW-NEXT: Instrumentation level: IR  entry_first = 0
+RAW-NEXT: Functions shown: 1
+RAW-NEXT: Total functions: 6
+RAW-NEXT: Maximum function count: 1000
+RAW-NEXT: Maximum internal block count: 250
+RAW-NEXT: Statistics for indirect call sites profile:
+RAW-NEXT:   Total number of sites: 2
+RAW-NEXT:   Total number of sites with values: 2
+RAW-NEXT:   Total number of profiled values: 4
+RAW-NEXT:   Value sites histogram:
+RAW-NEXT:         NumTargets, SiteCount
+RAW-NEXT:         2, 2
+
+INDEXED:      Counters:
+INDEXED-NEXT:   main:
+INDEXED-NEXT:     Hash: 0x0f9a16fe6d398548
+INDEXED-NEXT:     Counters: 2
+INDEXED-NEXT:     Indirect Call Site Count: 2
+INDEXED-NEXT:     VTable Results:
+INDEXED-NEXT:	      [  0, _ZTV8Derived2,        750 ] (75.00%)
+INDEXED-NEXT:     	  [  0, _ZTV8Derived1,        250 ] (25.00%)
+INDEXED-NEXT:         [  1, _ZTV8Derived2,        750 ] (75.00%)
+INDEXED-NEXT:         [  1, _ZTV8Derived1,        250 ] (25.00%)
+INDEXED-NEXT:     Indirect Target Results:
+INDEXED-NEXT:         [  0, _ZN8Derived25func1Eii,        750 ] (75.00%)
+INDEXED-NEXT:         [  0, _ZN8Derived15func1Eii,        250 ] (25.00%)
+INDEXED-NEXT:         [  1, _ZN8Derived25func2Eii,        750 ] (75.00%)
+INDEXED-NEXT:         [  1, _ZN8Derived15func2Eii,        250 ] (25.00%)
+INDEXED-NEXT: Instrumentation level: IR  entry_first = 0
+INDEXED-NEXT: Functions shown: 1
+INDEXED-NEXT: Total functions: 6
+INDEXED-NEXT: Maximum function count: 1000
+INDEXED-NEXT: Maximum internal block count: 250
+INDEXED-NEXT: Statistics for indirect call sites profile:
+INDEXED-NEXT:   Total number of sites: 2
+INDEXED-NEXT:   Total number of sites with values: 2
+INDEXED-NEXT:   Total number of profiled values: 4
+INDEXED-NEXT:   Value sites histogram:
+INDEXED-NEXT:       NumTargets, SiteCount
+INDEXED-NEXT:       2, 2
+
+ICTEXT: :ir
+ICTEXT: main
+ICTEXT: # Func Hash:
+ICTEXT: 1124236338992350536
+ICTEXT: # Num Counters:
+ICTEXT: 2
+ICTEXT: # Counter Values:
+ICTEXT: 1000
+ICTEXT: 1
+ICTEXT: # Num Value Kinds:
+ICTEXT: 2
+ICTEXT: # ValueKind = IPVK_IndirectCallTarget:
+ICTEXT: 0
+ICTEXT: # NumValueSites:
+ICTEXT: 2
+ICTEXT: 2
+ICTEXT: _ZN8Derived25func1Eii:750
+ICTEXT: _ZN8Derived15func1Eii:250
+ICTEXT: 2
+ICTEXT: _ZN8Derived25func2Eii:750
+ICTEXT: _ZN8Derived15func2Eii:250
+ICTEXT: # ValueKind = IPVK_VTableTarget:
+ICTEXT: 2
+ICTEXT: # NumValueSites:
+ICTEXT: 2
+ICTEXT: 2
+ICTEXT: _ZTV8Derived2:750
+ICTEXT: _ZTV8Derived1:250
+ICTEXT: 2
+ICTEXT: _ZTV8Derived2:750
+ICTEXT: _ZTV8Derived1:250
diff --git a/llvm/tools/llvm-profdata/llvm-profdata.cpp b/llvm/tools/llvm-profdata/llvm-profdata.cpp
index fdb2c1405f1237f..18fa08e46214c33 100644
--- a/llvm/tools/llvm-profdata/llvm-profdata.cpp
+++ b/llvm/tools/llvm-profdata/llvm-profdata.cpp
@@ -347,6 +347,13 @@ static void loadInput(const WeightedFile &Input, SymbolRemapper *Remapper,
     });
   }
 
+  const InstrProfSymtab &symtab = Reader->getSymtab();
+  const auto &VTableNames = symtab.getVTableNames();
+
+  for (const auto &kv : VTableNames) {
+    WC->Writer.addVTableName(kv.getKey());
+  }
+
   if (Reader->hasTemporalProfile()) {
     auto &Traces = Reader->getTemporalProfTraces(Input.Weight);
     if (!Traces.empty())
@@ -2413,12 +2420,12 @@ static void showValueSitesStats(raw_fd_ostream &OS, uint32_t VK,
 
 static int showInstrProfile(
     const std::string &Filename, bool ShowCounts, uint32_t TopN,
-    bool ShowIndirectCallTargets, bool ShowMemOPSizes, bool ShowDetailedSummary,
-    std::vector<uint32_t> DetailedSummaryCutoffs, bool ShowAllFunctions,
-    bool ShowCS, uint64_t ValueCutoff, bool OnlyListBelow,
-    const std::string &ShowFunction, bool TextFormat, bool ShowBinaryIds,
-    bool ShowCovered, bool ShowProfileVersion, bool ShowTemporalProfTraces,
-    ShowFormat SFormat, raw_fd_ostream &OS) {
+    bool ShowIndirectCallTargets, bool ShowMemOPSizes, bool ShowVTables,
+    bool ShowDetailedSummary, std::vector<uint32_t> DetailedSummaryCutoffs,
+    bool ShowAllFunctions, bool ShowCS, uint64_t ValueCutoff,
+    bool OnlyListBelow, const std::string &ShowFunction, bool TextFormat,
+    bool ShowBinaryIds, bool ShowCovered, bool ShowProfileVersion,
+    bool ShowTemporalProfTraces, ShowFormat SFormat, raw_fd_ostream &OS) {
   if (SFormat == ShowFormat::Json)
     exitWithError("JSON output is not supported for instr profiles");
   if (SFormat == ShowFormat::Yaml)
@@ -2554,6 +2561,13 @@ static int showInstrProfile(
         OS << "    Number of Memory Intrinsics Calls: " << NumMemOPCalls
            << "\n";
 
+      if (ShowVTables) {
+        OS << "    VTable Results:\n";
+        traverseAllValueSites(Func, IPVK_VTableTarget,
+                              VPStats[IPVK_VTableTarget], OS,
+                              &(Reader->getSymtab()));
+      }
+
       if (ShowCounts) {
         OS << "    Block counts: [";
         size_t Start = (IsIRInstr ? 0 : 1);
@@ -2934,6 +2948,9 @@ static int show_main(int argc, const char *argv[]) {
   cl::opt<bool> ShowIndirectCallTargets(
       "ic-targets", cl::init(false),
       cl::desc("Show indirect call site target values for shown functions"));
+  cl::opt<bool> ShowVTables(
+      "show-vtables", cl::init(false),
+      cl::desc("Show virtual table target values for shown functions"));
   cl::opt<bool> ShowMemOPSizes(
       "memop-sizes", cl::init(false),
       cl::desc("Show the profiled sizes of the memory intrinsic calls "
@@ -3036,10 +3053,10 @@ static int show_main(int argc, const char *argv[]) {
   if (ProfileKind == instr)
     return showInstrProfile(
         Filename, ShowCounts, TopNFunctions, ShowIndirectCallTargets,
-        ShowMemOPSizes, ShowDetailedSummary, DetailedSummaryCutoffs,
-        ShowAllFunctions, ShowCS, ValueCutoff, OnlyListBelow, ShowFunction,
-        TextFormat, ShowBinaryIds, ShowCovered, ShowProfileVersion,
-        ShowTemporalProfTraces, SFormat, OS);
+        ShowMemOPSizes, ShowVTables, ShowDetailedSummary,
+        DetailedSummaryCutoffs, ShowAllFunctions, ShowCS, ValueCutoff,
+        OnlyListBelow, ShowFunction, TextFormat, ShowBinaryIds, ShowCovered,
+        ShowProfileVersion, ShowTemporalProfTraces, SFormat, OS);
   if (ProfileKind == sample)
     return showSampleProfile(Filename, ShowCounts, TopNFunctions,
                              ShowAllFunctions, ShowDetailedSummary,



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