diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 52d161703f965e..62e50a807f4f6e 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -1834,6 +1834,18 @@ def fprofile_selected_function_group :
   Visibility<[ClangOption, CC1Option]>, MetaVarName<"<i>">,
   HelpText<"Partition functions into N groups using -fprofile-function-groups and select only functions in group i to be instrumented. The valid range is 0 to N-1 inclusive">,
   MarshallingInfoInt<CodeGenOpts<"ProfileSelectedFunctionGroup">>;
+def fcodegen_data_generate : Joined<["-"], "fcodegen-data-generate">,
+    Group<f_Group>, Visibility<[ClangOption, CC1Option]>,
+    HelpText<"Emit codegen data into object file. LLD for MachO (for now) merges them into default.cgdata">;
+def fcodegen_data_generate_EQ : Joined<["-"], "fcodegen-data-generate=">,
+    Group<f_Group>, Visibility<[ClangOption, CC1Option]>, MetaVarName<"<directory>">,
+    HelpText<"Emit codegen data into object file. LLD for MachO (for now) merges them into <directory>/default.cgdata">;
+def fcodegen_data_use : Joined<["-"], "fcodegen-data-use">,
+    Group<f_Group>, Visibility<[ClangOption, CC1Option]>,
+    HelpText<"Use codegen data read from default.cgdata to optimize the binary">;
+def fcodegen_data_use_EQ : Joined<["-"], "fcodegen-data-use=">,
+    Group<f_Group>, Visibility<[ClangOption, CC1Option]>, MetaVarName<"<directory>">,
+    HelpText<"Use codegen data read from <directory>/default.cgdata to optimize the binary">;
 def fswift_async_fp_EQ : Joined<["-"], "fswift-async-fp=">,
     Group<f_Group>,
     Visibility<[ClangOption, CC1Option, CC1AsOption, CLOption]>,
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index b65b96db16bd79..8490955a5ae82c 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -2752,6 +2752,33 @@ void tools::addMachineOutlinerArgs(const Driver &D,
       addArg(Twine("-enable-machine-outliner=never"));
     }
   }
+
+  auto *CodeGenDataGenArg =
+      Args.getLastArg(options::OPT_fcodegen_data_generate,
+                      options::OPT_fcodegen_data_generate_EQ);
+  auto *CodeGenDataUseArg = Args.getLastArg(options::OPT_fcodegen_data_use,
+                                            options::OPT_fcodegen_data_use_EQ);
+
+  // We only allow one of them to be specified.
+  if (CodeGenDataGenArg && CodeGenDataUseArg)
+    D.Diag(diag::err_drv_argument_not_allowed_with)
+        << CodeGenDataGenArg->getAsString(Args)
+        << CodeGenDataUseArg->getAsString(Args);
+
+  // For codegen data gen, the output file is passed to the linker
+  // while a boolean flag is passed to the LLVM backend.
+  if (CodeGenDataGenArg)
+    addArg(Twine("-codegen-data-generate"));
+
+  // For codegen data use, the input file is passed to the LLVM backend.
+  if (CodeGenDataUseArg) {
+    SmallString<128> Path(CodeGenDataUseArg->getNumValues() == 0
+                              ? ""
+                              : CodeGenDataUseArg->getValue());
+    if (Path.empty() || llvm::sys::fs::is_directory(Path))
+      llvm::sys::path::append(Path, "default.cgdata");
+    addArg(Twine("-codegen-data-use-path=" + Path.str()));
+  }
 }
 
 void tools::addOpenMPDeviceRTL(const Driver &D,
diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index caf6c4a444fdce..85407ea5c69dfc 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -476,6 +476,19 @@ void darwin::Linker::AddLinkArgs(Compilation &C, const ArgList &Args,
         llvm::sys::path::append(Path, "default.profdata");
       CmdArgs.push_back(Args.MakeArgString(Twine("--cs-profile-path=") + Path));
     }
+
+    auto *CodeGenDataGenArg =
+        Args.getLastArg(options::OPT_fcodegen_data_generate,
+                        options::OPT_fcodegen_data_generate_EQ);
+    if (CodeGenDataGenArg) {
+      SmallString<128> Path(CodeGenDataGenArg->getNumValues() == 0
+                                ? ""
+                                : CodeGenDataGenArg->getValue());
+      if (Path.empty() || llvm::sys::fs::is_directory(Path))
+        llvm::sys::path::append(Path, "default.cgdata");
+      CmdArgs.push_back(
+          Args.MakeArgString(Twine("--codegen-data-generate-path=") + Path));
+    }
   }
 }
 
@@ -633,6 +646,39 @@ void darwin::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   CmdArgs.push_back("-mllvm");
   CmdArgs.push_back("-enable-linkonceodr-outlining");
 
+  // Propagate codegen data flags to the linker for the LLVM backend.
+  auto *CodeGenDataGenArg =
+      Args.getLastArg(options::OPT_fcodegen_data_generate,
+                      options::OPT_fcodegen_data_generate_EQ);
+  auto *CodeGenDataUseArg = Args.getLastArg(options::OPT_fcodegen_data_use,
+                                            options::OPT_fcodegen_data_use_EQ);
+
+  // We only allow one of them to be specified.
+  const Driver &D = getToolChain().getDriver();
+  if (CodeGenDataGenArg && CodeGenDataUseArg)
+    D.Diag(diag::err_drv_argument_not_allowed_with)
+        << CodeGenDataGenArg->getAsString(Args)
+        << CodeGenDataUseArg->getAsString(Args);
+
+  // For codegen data gen, the output file is passed to the linker
+  // while a boolean flag is passed to the LLVM backend.
+  if (CodeGenDataGenArg) {
+    CmdArgs.push_back("-mllvm");
+    CmdArgs.push_back("-codegen-data-generate");
+  }
+
+  // For codegen data use, the input file is passed to the LLVM backend.
+  if (CodeGenDataUseArg) {
+    SmallString<128> Path(CodeGenDataUseArg->getNumValues() == 0
+                              ? ""
+                              : CodeGenDataUseArg->getValue());
+    if (Path.empty() || llvm::sys::fs::is_directory(Path))
+      llvm::sys::path::append(Path, "default.cgdata");
+    CmdArgs.push_back("-mllvm");
+    CmdArgs.push_back(
+        Args.MakeArgString("-codegen-data-use-path=" + Path.str()));
+  }
+
   // Setup statistics file output.
   SmallString<128> StatsFile =
       getStatsFileName(Args, Output, Inputs[0], getToolChain().getDriver());
diff --git a/clang/test/Driver/codegen-data.c b/clang/test/Driver/codegen-data.c
new file mode 100644
index 00000000000000..a72850afc59736
--- /dev/null
+++ b/clang/test/Driver/codegen-data.c
@@ -0,0 +1,42 @@
+// Verify only one of codegen-data flag is passed.
+// RUN: not %clang -### -S --target=aarch64-linux-gnu -fcodegen-data-generate -fcodegen-data-use %s 2>&1 | FileCheck %s --check-prefix=CONFLICT
+// RUN: not %clang -### -S --target=arm64-apple-darwin  -fcodegen-data-generate -fcodegen-data-use %s 2>&1 | FileCheck %s --check-prefix=CONFLICT
+// CONFLICT: error: invalid argument '-fcodegen-data-generate' not allowed with '-fcodegen-data-use'
+
+// Verify the codegen-data-generate (boolean) flag is passed to LLVM
+// RUN: %clang -### -S --target=aarch64-linux-gnu -fcodegen-data-generate %s  2>&1| FileCheck %s --check-prefix=GENERATE
+// RUN: %clang -### -S --target=arm64-apple-darwin -fcodegen-data-generate %s 2>&1| FileCheck %s --check-prefix=GENERATE
+// GENERATE: "-mllvm" "-codegen-data-generate"
+
+// Verify the codegen-data-use-path flag (with a default value) is passed to LLVM.
+// RUN: %clang -### -S --target=aarch64-linux-gnu -fcodegen-data-use %s 2>&1| FileCheck %s --check-prefix=USE
+// RUN: %clang -### -S --target=arm64-apple-darwin -fcodegen-data-use %s 2>&1| FileCheck %s --check-prefix=USE
+// RUN: mkdir -p %t.d/some/dir
+// RUN: %clang -### -S --target=aarch64-linux-gnu -fcodegen-data-use=%t.d/some/dir %s 2>&1 | FileCheck %s --check-prefix=USE-DIR
+// RUN: %clang -### -S --target=arm64-apple-darwin -fcodegen-data-use=%t.d/some/dir %s 2>&1 | FileCheck %s --check-prefix=USE-DIR
+// RUN: %clang -### -S --target=aarch64-linux-gnu -fcodegen-data-use=file %s 2>&1 | FileCheck %s --check-prefix=USE-FILE
+// RUN: %clang -### -S --target=arm64-apple-darwin -fcodegen-data-use=file %s 2>&1 | FileCheck %s --check-prefix=USE-FILE
+// USE: "-mllvm" "-codegen-data-use-path=default.cgdata"
+// USE-DIR: "-mllvm" "-codegen-data-use-path={{.*}}.d/some/dir{{/|\\\\}}default.cgdata"
+// USE-FILE: "-mllvm" "-codegen-data-use-path=file"
+
+// Verify the codegen-data-generate (boolean) flag with a LTO.
+// RUN: %clang -### -flto --target=aarch64-linux-gnu -fcodegen-data-generate %s 2>&1 | FileCheck %s --check-prefix=GENERATE-LTO
+// GENERATE-LTO: {{ld(.exe)?"}}
+// GENERATE-LTO-SAME: "-plugin-opt=-codegen-data-generate"
+// RUN: %clang -### -flto --target=arm64-apple-darwin -fcodegen-data-generate %s 2>&1 | FileCheck %s --check-prefix=GENERATE-LTO-DARWIN
+// GENERATE-LTO-DARWIN: {{ld(.exe)?"}}
+// GENERATE-LTO-DARWIN-SAME: "-mllvm" "-codegen-data-generate"
+
+// Verify the codegen-data-use-path flag with a LTO is passed to LLVM.
+// RUN: %clang -### -flto=thin --target=aarch64-linux-gnu -fcodegen-data-use %s 2>&1 | FileCheck %s --check-prefix=USE-LTO
+// USE-LTO: {{ld(.exe)?"}}
+// USE-LTO-SAME: "-plugin-opt=-codegen-data-use-path=default.cgdata"
+// RUN: %clang -### -flto=thin --target=arm64-apple-darwin -fcodegen-data-use %s 2>&1 | FileCheck %s --check-prefix=USE-LTO-DARWIN
+// USE-LTO-DARWIN: {{ld(.exe)?"}}
+// USE-LTO-DARWIN-SAME: "-mllvm" "-codegen-data-use-path=default.cgdata"
+
+// For now, LLD MachO supports for generating the codegen data at link time.
+// RUN: %clang -### -fuse-ld=lld -B%S/Inputs/lld --target=arm64-apple-darwin -fcodegen-data-generate %s 2>&1 | FileCheck %s --check-prefix=GENERATE-LLD-DARWIN
+// GENERATE-LLD-DARWIN: {{ld(.exe)?"}}
+// GENERATE-LLD-DARWIN-SAME: "--codegen-data-generate-path=default.cgdata"