diff --git a/llvm/test/CMakeLists.txt b/llvm/test/CMakeLists.txt
--- a/llvm/test/CMakeLists.txt
+++ b/llvm/test/CMakeLists.txt
@@ -131,7 +131,7 @@
           llvm-strip
           llvm-symbolizer
           llvm-tblgen
-          llvm-tapi-diff
+          llvm-readtapi
           llvm-tli-checker
           llvm-undname
           llvm-windres
diff --git a/llvm/test/lit.cfg.py b/llvm/test/lit.cfg.py
--- a/llvm/test/lit.cfg.py
+++ b/llvm/test/lit.cfg.py
@@ -225,7 +225,7 @@
         "llvm-strings",
         "llvm-strip",
         "llvm-tblgen",
-        "llvm-tapi-diff",
+        "llvm-readtapi",
         "llvm-undname",
         "llvm-windres",
         "llvm-c-test",
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/macho.yaml b/llvm/test/tools/llvm-readtapi/Inputs/macho.yaml
rename from llvm/test/tools/llvm-tapi-diff/Inputs/macho.yaml
rename to llvm/test/tools/llvm-readtapi/Inputs/macho.yaml
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/v4A.tbd b/llvm/test/tools/llvm-readtapi/Inputs/v4A.tbd
rename from llvm/test/tools/llvm-tapi-diff/Inputs/v4A.tbd
rename to llvm/test/tools/llvm-readtapi/Inputs/v4A.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/v4B.tbd b/llvm/test/tools/llvm-readtapi/Inputs/v4B.tbd
rename from llvm/test/tools/llvm-tapi-diff/Inputs/v4B.tbd
rename to llvm/test/tools/llvm-readtapi/Inputs/v4B.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/v4C.tbd b/llvm/test/tools/llvm-readtapi/Inputs/v4C.tbd
rename from llvm/test/tools/llvm-tapi-diff/Inputs/v4C.tbd
rename to llvm/test/tools/llvm-readtapi/Inputs/v4C.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/v4D.tbd b/llvm/test/tools/llvm-readtapi/Inputs/v4D.tbd
rename from llvm/test/tools/llvm-tapi-diff/Inputs/v4D.tbd
rename to llvm/test/tools/llvm-readtapi/Inputs/v4D.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/Inputs/v4E.tbd b/llvm/test/tools/llvm-readtapi/Inputs/v4E.tbd
rename from llvm/test/tools/llvm-tapi-diff/Inputs/v4E.tbd
rename to llvm/test/tools/llvm-readtapi/Inputs/v4E.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/incorrect-format.test b/llvm/test/tools/llvm-readtapi/compare-incorrect-format.test
rename from llvm/test/tools/llvm-tapi-diff/incorrect-format.test
rename to llvm/test/tools/llvm-readtapi/compare-incorrect-format.test
--- a/llvm/test/tools/llvm-tapi-diff/incorrect-format.test
+++ b/llvm/test/tools/llvm-readtapi/compare-incorrect-format.test
@@ -1,6 +1,6 @@
 ; RUN: mkdir -p %t
 ; RUN: yaml2obj %S/Inputs/macho.yaml -o %t/macho.dylib
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %t/macho.dylib 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4A.tbd %t/macho.dylib 2>&1 | FileCheck %s
 
 ; CHECK: error: {{.*}}macho.dylib' unsupported file format
 ; CHECK-NOT: error:
diff --git a/llvm/test/tools/llvm-tapi-diff/same-num-inlines.test b/llvm/test/tools/llvm-readtapi/compare-inlines.test
rename from llvm/test/tools/llvm-tapi-diff/same-num-inlines.test
rename to llvm/test/tools/llvm-readtapi/compare-inlines.test
--- a/llvm/test/tools/llvm-tapi-diff/same-num-inlines.test
+++ b/llvm/test/tools/llvm-readtapi/compare-inlines.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4B.tbd %S/Inputs/v4E.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4B.tbd %S/Inputs/v4E.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4B.tbd
 ; CHECK:> {{.*}}/Inputs/v4E.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/left-single-inline.test b/llvm/test/tools/llvm-readtapi/compare-left-single-inline.test
rename from llvm/test/tools/llvm-tapi-diff/left-single-inline.test
rename to llvm/test/tools/llvm-readtapi/compare-left-single-inline.test
--- a/llvm/test/tools/llvm-tapi-diff/left-single-inline.test
+++ b/llvm/test/tools/llvm-readtapi/compare-left-single-inline.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4B.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4A.tbd %S/Inputs/v4B.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4A.tbd
 ; CHECK:> {{.*}}/Inputs/v4B.tbd
diff --git a/llvm/test/tools/llvm-readtapi/compare-matching-tapi-files.test b/llvm/test/tools/llvm-readtapi/compare-matching-tapi-files.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-readtapi/compare-matching-tapi-files.test
@@ -0,0 +1,4 @@
+; RUN: llvm-readtapi --compare %S/Inputs/v4A.tbd %S/Inputs/v4A.tbd 2>&1 | FileCheck %s --allow-empty
+
+; CHECK-NOT: error:
+; CHECK-NOT: warning:
diff --git a/llvm/test/tools/llvm-tapi-diff/mismatched-number-of-inlines.test b/llvm/test/tools/llvm-readtapi/compare-mismatched-inlines.test
rename from llvm/test/tools/llvm-tapi-diff/mismatched-number-of-inlines.test
rename to llvm/test/tools/llvm-readtapi/compare-mismatched-inlines.test
--- a/llvm/test/tools/llvm-tapi-diff/mismatched-number-of-inlines.test
+++ b/llvm/test/tools/llvm-readtapi/compare-mismatched-inlines.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4B.tbd %S/Inputs/v4D.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4B.tbd %S/Inputs/v4D.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4B.tbd
 ; CHECK:> {{.*}}/Inputs/v4D.tbd
diff --git a/llvm/test/tools/llvm-readtapi/compare-misspelled-files.test b/llvm/test/tools/llvm-readtapi/compare-misspelled-files.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-readtapi/compare-misspelled-files.test
@@ -0,0 +1,3 @@
+; RUN: not llvm-readtapi --compare %S/Inputs/v4A.tbd %S/Inputs/v4.tbd 2>&1 | FileCheck -DMSG=%errc_ENOENT %s
+
+; CHECK: error: {{.*}}v4.tbd' [[MSG]]
diff --git a/llvm/test/tools/llvm-tapi-diff/multiple-inlines.test b/llvm/test/tools/llvm-readtapi/compare-multiple-inlines.test
rename from llvm/test/tools/llvm-tapi-diff/multiple-inlines.test
rename to llvm/test/tools/llvm-readtapi/compare-multiple-inlines.test
--- a/llvm/test/tools/llvm-tapi-diff/multiple-inlines.test
+++ b/llvm/test/tools/llvm-readtapi/compare-multiple-inlines.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4D.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4A.tbd %S/Inputs/v4D.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4A.tbd
 ; CHECK:> {{.*}}/Inputs/v4D.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/no-inlines.test b/llvm/test/tools/llvm-readtapi/compare-no-inlines.test
rename from llvm/test/tools/llvm-tapi-diff/no-inlines.test
rename to llvm/test/tools/llvm-readtapi/compare-no-inlines.test
--- a/llvm/test/tools/llvm-tapi-diff/no-inlines.test
+++ b/llvm/test/tools/llvm-readtapi/compare-no-inlines.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4C.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4A.tbd %S/Inputs/v4C.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4A.tbd
 ; CHECK:> {{.*}}/Inputs/v4C.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/right-single-inlines.test b/llvm/test/tools/llvm-readtapi/compare-right-single-inline.test
rename from llvm/test/tools/llvm-tapi-diff/right-single-inlines.test
rename to llvm/test/tools/llvm-readtapi/compare-right-single-inline.test
--- a/llvm/test/tools/llvm-tapi-diff/right-single-inlines.test
+++ b/llvm/test/tools/llvm-readtapi/compare-right-single-inline.test
@@ -1,4 +1,4 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4B.tbd %S/Inputs/v4C.tbd 2>&1 | FileCheck %s
+; RUN: not llvm-readtapi --compare %S/Inputs/v4B.tbd %S/Inputs/v4C.tbd 2>&1 | FileCheck %s
 
 ; CHECK:< {{.*}}/Inputs/v4B.tbd
 ; CHECK:> {{.*}}/Inputs/v4C.tbd
diff --git a/llvm/test/tools/llvm-tapi-diff/v5.test b/llvm/test/tools/llvm-readtapi/compare-v5.test
rename from llvm/test/tools/llvm-tapi-diff/v5.test
rename to llvm/test/tools/llvm-readtapi/compare-v5.test
--- a/llvm/test/tools/llvm-tapi-diff/v5.test
+++ b/llvm/test/tools/llvm-readtapi/compare-v5.test
@@ -1,7 +1,7 @@
 ; RUN: rm -rf %t
 ; RUN: split-file %s %t  
-; RUN: llvm-tapi-diff %t/Simple_v5.tbd  %t/Simple_v5.tbd 2>&1 | FileCheck %s --allow-empty
-; RUN: llvm-tapi-diff %t/Simple_v5.tbd  %t/Simple_v4.tbd 2>&1 | FileCheck %s --allow-empty
+; RUN: llvm-readtapi --compare %t/Simple_v5.tbd  %t/Simple_v5.tbd 2>&1 | FileCheck %s --allow-empty
+; RUN: llvm-readtapi --compare %t/Simple_v5.tbd  %t/Simple_v4.tbd 2>&1 | FileCheck %s --allow-empty
 
 ; CHECK-NOT: error:
 ; CHECK-NOT: warning:
diff --git a/llvm/test/tools/llvm-tapi-diff/matching-tbd.test b/llvm/test/tools/llvm-tapi-diff/matching-tbd.test
deleted file mode 100644
--- a/llvm/test/tools/llvm-tapi-diff/matching-tbd.test
+++ /dev/null
@@ -1,4 +0,0 @@
-; RUN: llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4A.tbd 2>&1 | FileCheck %s --allow-empty
-
-; CHECK-NOT: error:
-; CHECK-NOT: warning:
diff --git a/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test b/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test
deleted file mode 100644
--- a/llvm/test/tools/llvm-tapi-diff/misspelled-tbd.test
+++ /dev/null
@@ -1,3 +0,0 @@
-; RUN: not llvm-tapi-diff %S/Inputs/v4A.tbd %S/Inputs/v4.tbd 2>&1 | FileCheck -DMSG=%errc_ENOENT %s
-
-; CHECK: error: {{.*}}v4.tbd' [[MSG]]
diff --git a/llvm/tools/llvm-tapi-diff/CMakeLists.txt b/llvm/tools/llvm-readtapi/CMakeLists.txt
rename from llvm/tools/llvm-tapi-diff/CMakeLists.txt
rename to llvm/tools/llvm-readtapi/CMakeLists.txt
--- a/llvm/tools/llvm-tapi-diff/CMakeLists.txt
+++ b/llvm/tools/llvm-readtapi/CMakeLists.txt
@@ -4,7 +4,7 @@
   TextAPI
   )
 
-add_llvm_tool(llvm-tapi-diff
-  llvm-tapi-diff.cpp
+add_llvm_tool(llvm-readtapi
+  llvm-readtapi.cpp
   DiffEngine.cpp
   )
diff --git a/llvm/tools/llvm-tapi-diff/DiffEngine.h b/llvm/tools/llvm-readtapi/DiffEngine.h
rename from llvm/tools/llvm-tapi-diff/DiffEngine.h
rename to llvm/tools/llvm-readtapi/DiffEngine.h
diff --git a/llvm/tools/llvm-tapi-diff/DiffEngine.cpp b/llvm/tools/llvm-readtapi/DiffEngine.cpp
rename from llvm/tools/llvm-tapi-diff/DiffEngine.cpp
rename to llvm/tools/llvm-readtapi/DiffEngine.cpp
diff --git a/llvm/tools/llvm-readtapi/llvm-readtapi.cpp b/llvm/tools/llvm-readtapi/llvm-readtapi.cpp
new file mode 100644
--- /dev/null
+++ b/llvm/tools/llvm-readtapi/llvm-readtapi.cpp
@@ -0,0 +1,90 @@
+//===-- llvm-readtapi.cpp - tapi file reader and manipulator -----*- C++-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the command-line driver for llvm-readtapi.
+//
+//===----------------------------------------------------------------------===//
+#include "DiffEngine.h"
+#include "llvm/Object/TapiUniversal.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/WithColor.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstdlib>
+
+using namespace llvm;
+using namespace MachO;
+using namespace object;
+
+namespace {
+cl::OptionCategory TapiCat("llvm-readtapi options");
+cl::OptionCategory CompareCat("llvm-readtapi --compare options");
+
+cl::opt<std::string> InputFileName(cl::Positional, cl::desc("<tapi file>"),
+                                   cl::Required, cl::cat(TapiCat));
+cl::opt<std::string> CompareInputFileName(cl::Positional,
+                                          cl::desc("<comparison file>"),
+                                          cl::Required, cl::cat(CompareCat));
+enum OutputKind {
+  Compare,
+};
+
+cl::opt<OutputKind>
+    Output(cl::desc("choose command action:"),
+           cl::values(clEnumValN(Compare, "compare",
+                                 "compare tapi file for library differences")),
+           cl::init(OutputKind::Compare), cl::cat(TapiCat));
+} // anonymous namespace
+
+Expected<std::unique_ptr<Binary>> convertFileToBinary(std::string &Filename) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
+      MemoryBuffer::getFileOrSTDIN(Filename);
+  if (BufferOrErr.getError())
+    return errorCodeToError(BufferOrErr.getError());
+  return createBinary(BufferOrErr.get()->getMemBufferRef());
+}
+
+int main(int Argc, char **Argv) {
+  InitLLVM X(Argc, Argv);
+  cl::HideUnrelatedOptions(TapiCat);
+  cl::ParseCommandLineOptions(Argc, Argv,
+                              "TAPI File Reader and Manipulator Tool");
+
+  if (Output == OutputKind::Compare) {
+    if (InputFileName.empty() || CompareInputFileName.empty()) {
+      cl::PrintHelpMessage();
+      return EXIT_FAILURE;
+    }
+
+    ExitOnError ExitOnErr("error: '" + InputFileName + "' ",
+                          /*DefaultErrorExitCode=*/2);
+    auto BinLHS = ExitOnErr(convertFileToBinary(InputFileName));
+
+    TapiUniversal *FileLHS = dyn_cast<TapiUniversal>(BinLHS.get());
+    if (!FileLHS) {
+      ExitOnErr(createStringError(std::errc::executable_format_error,
+                                  "unsupported file format"));
+    }
+
+    ExitOnErr.setBanner("error: '" + CompareInputFileName + "' ");
+    auto BinRHS = ExitOnErr(convertFileToBinary(CompareInputFileName));
+
+    TapiUniversal *FileRHS = dyn_cast<TapiUniversal>(BinRHS.get());
+    if (!FileRHS) {
+      ExitOnErr(createStringError(std::errc::executable_format_error,
+                                  "unsupported file format"));
+    }
+
+    raw_ostream &OS = outs();
+    return DiffEngine(FileLHS, FileRHS).compareFiles(OS);
+  }
+
+  return 0;
+}
diff --git a/llvm/tools/llvm-tapi-diff/llvm-tapi-diff.cpp b/llvm/tools/llvm-tapi-diff/llvm-tapi-diff.cpp
deleted file mode 100644
--- a/llvm/tools/llvm-tapi-diff/llvm-tapi-diff.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-//===-- llvm-tapi-diff.cpp - tbd comparator command-line driver --*- C++-*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the command-line driver for the llvm-tapi difference
-// engine.
-//
-//===----------------------------------------------------------------------===//
-#include "DiffEngine.h"
-#include "llvm/Object/TapiUniversal.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/InitLLVM.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/WithColor.h"
-#include "llvm/Support/raw_ostream.h"
-#include <cstdlib>
-
-using namespace llvm;
-using namespace MachO;
-using namespace object;
-
-namespace {
-cl::OptionCategory NMCat("llvm-tapi-diff Options");
-cl::opt<std::string> InputFileNameLHS(cl::Positional, cl::desc("<first file>"),
-                                      cl::cat(NMCat));
-cl::opt<std::string> InputFileNameRHS(cl::Positional, cl::desc("<second file>"),
-                                      cl::cat(NMCat));
-} // anonymous namespace
-
-Expected<std::unique_ptr<Binary>> convertFileToBinary(std::string &Filename) {
-  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
-      MemoryBuffer::getFileOrSTDIN(Filename);
-  if (BufferOrErr.getError())
-    return errorCodeToError(BufferOrErr.getError());
-  return createBinary(BufferOrErr.get()->getMemBufferRef());
-}
-
-int main(int Argc, char **Argv) {
-  InitLLVM X(Argc, Argv);
-  cl::HideUnrelatedOptions(NMCat);
-  cl::ParseCommandLineOptions(Argc, Argv, "Text-based Stubs Comparison Tool");
-  if (InputFileNameLHS.empty() || InputFileNameRHS.empty()) {
-    cl::PrintHelpMessage();
-    return EXIT_FAILURE;
-  }
-
-  ExitOnError ExitOnErr("error: '" + InputFileNameLHS + "' ",
-                        /*DefaultErrorExitCode=*/2);
-  auto BinLHS = ExitOnErr(convertFileToBinary(InputFileNameLHS));
-
-  TapiUniversal *FileLHS = dyn_cast<TapiUniversal>(BinLHS.get());
-  if (!FileLHS) {
-    ExitOnErr(createStringError(std::errc::executable_format_error,
-                                "unsupported file format"));
-  }
-
-  ExitOnErr.setBanner("error: '" + InputFileNameRHS + "' ");
-  auto BinRHS = ExitOnErr(convertFileToBinary(InputFileNameRHS));
-
-  TapiUniversal *FileRHS = dyn_cast<TapiUniversal>(BinRHS.get());
-  if (!FileRHS) {
-    ExitOnErr(createStringError(std::errc::executable_format_error,
-                                "unsupported file format"));
-  }
-
-  raw_ostream &OS = outs();
-
-  return DiffEngine(FileLHS, FileRHS).compareFiles(OS);
-}