diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -4967,8 +4967,8 @@
   HelpText<"The string to embed in the .LLVM.command.line section.">,
   MarshallingInfoString<CodeGenOpts<"RecordCommandLine">>;
 def compress_debug_sections_EQ : Joined<["-", "--"], "compress-debug-sections=">,
-    HelpText<"DWARF debug sections compression type">, Values<"none,zlib,zlib-gnu">,
-    NormalizedValuesScope<"llvm::DebugCompressionType">, NormalizedValues<["None", "Z", "GNU"]>,
+    HelpText<"DWARF debug sections compression type">, Values<"none,zlib">,
+    NormalizedValuesScope<"llvm::DebugCompressionType">, NormalizedValues<["None", "Z"]>,
     MarshallingInfoEnum<CodeGenOpts<"CompressDebugSections">, "None">;
 def compress_debug_sections : Flag<["-", "--"], "compress-debug-sections">,
   Alias<compress_debug_sections_EQ>, AliasArgs<["zlib"]>;
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1115,7 +1115,7 @@
     StringRef Value = A->getValue();
     if (Value == "none") {
       CmdArgs.push_back("--compress-debug-sections=none");
-    } else if (Value == "zlib" || Value == "zlib-gnu") {
+    } else if (Value == "zlib") {
       if (llvm::zlib::isAvailable()) {
         CmdArgs.push_back(
             Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -286,13 +286,13 @@
     const ToolChain &TC, const llvm::opt::ArgList &Args,
     llvm::opt::ArgStringList &CmdArgs) {
   // GNU ld supports --compress-debug-sections=none|zlib|zlib-gnu|zlib-gabi
-  // whereas zlib is an alias to zlib-gabi. Therefore -gz=none|zlib|zlib-gnu
-  // are translated to --compress-debug-sections=none|zlib|zlib-gnu.
-  // -gz is not translated since ld --compress-debug-sections option requires an
+  // whereas zlib is an alias to zlib-gabi and zlib-gabi is obsoleted. Therefore
+  // -gz=none|zlib are translated to --compress-debug-sections=none|zlib. -gz
+  // is not translated since ld --compress-debug-sections option requires an
   // argument.
   if (const Arg *A = Args.getLastArg(options::OPT_gz_EQ)) {
     StringRef V = A->getValue();
-    if (V == "none" || V == "zlib" || V == "zlib-gnu")
+    if (V == "none" || V == "zlib")
       CmdArgs.push_back(Args.MakeArgString("--compress-debug-sections=" + V));
     else
       TC.getDriver().Diag(diag::err_drv_unsupported_option_argument)
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -694,7 +694,7 @@
       CmdArgs.push_back("--compress-debug-sections");
     } else {
       StringRef Value = A->getValue();
-      if (Value == "none" || Value == "zlib" || Value == "zlib-gnu") {
+      if (Value == "none" || Value == "zlib") {
         CmdArgs.push_back(
             Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
       } else {
diff --git a/clang/test/Driver/amdgcn-gz-options.cl b/clang/test/Driver/amdgcn-gz-options.cl
--- a/clang/test/Driver/amdgcn-gz-options.cl
+++ b/clang/test/Driver/amdgcn-gz-options.cl
@@ -9,8 +9,3 @@
 // RUN: %clang -### -target amdgcn-amd-amdhsa -gz=zlib %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB %s
 // CHECK-OPT_GZ_EQ_ZLIB: {{.* "-cc1(as)?".* "--compress-debug-sections=zlib"}}
 // CHECK-OPT_GZ_EQ_ZLIB: "--compress-debug-sections=zlib"
-
-// RUN: %clang -### -target amdgcn-amd-amdhsa -gz=zlib-gnu -x assembler %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// RUN: %clang -### -target amdgcn-amd-amdhsa -gz=zlib-gnu %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// CHECK-OPT_GZ_EQ_ZLIB_GNU: {{.* "-cc1(as)?".* "--compress-debug-sections=zlib-gnu"}}
-// CHECK-OPT_GZ_EQ_ZLIB_GNU: "--compress-debug-sections=zlib-gnu"
diff --git a/clang/test/Driver/compress-noias.c b/clang/test/Driver/compress-noias.c
--- a/clang/test/Driver/compress-noias.c
+++ b/clang/test/Driver/compress-noias.c
@@ -27,10 +27,6 @@
 // RUN: %clang -### -target i686-unknown-linux-gnu -fno-integrated-as -gz=zlib -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB %s
 // CHECK-OPT_GZ_EQ_ZLIB: "--compress-debug-sections=zlib"
 
-// RUN: %clang -### -target i686-unknown-linux-gnu -fno-integrated-as -gz=zlib-gnu -x assembler -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// RUN: %clang -### -target i686-unknown-linux-gnu -fno-integrated-as -gz=zlib-gnu -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// CHECK-OPT_GZ_EQ_ZLIB_GNU: "--compress-debug-sections=zlib-gnu"
-
 // RUN: %clang -### -target i686-unknown-linux-gnu -fno-integrated-as -gz=invalid -x assembler -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_INVALID %s
 // RUN: %clang -### -target i686-unknown-linux-gnu -fno-integrated-as -gz=invalid -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_INVALID %s
 // CHECK-OPT_GZ_EQ_INVALID: error: unsupported argument 'invalid' to option 'gz='
diff --git a/clang/test/Driver/compress.c b/clang/test/Driver/compress.c
--- a/clang/test/Driver/compress.c
+++ b/clang/test/Driver/compress.c
@@ -29,11 +29,6 @@
 // CHECK-OPT_GZ_EQ_ZLIB: {{.* "-cc1(as)?".* "--compress-debug-sections=zlib"}}
 // CHECK-OPT_GZ_EQ_ZLIB: "--compress-debug-sections=zlib"
 
-// RUN: %clang -### -target x86_64-unknown-linux-gnu -gz=zlib-gnu -x assembler %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// RUN: %clang -### -target x86_64-unknown-linux-gnu -gz=zlib-gnu %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_ZLIB_GNU %s
-// CHECK-OPT_GZ_EQ_ZLIB_GNU: {{.* "-cc1(as)?".* "--compress-debug-sections=zlib-gnu"}}
-// CHECK-OPT_GZ_EQ_ZLIB_GNU: "--compress-debug-sections=zlib-gnu"
-
 // RUN: %clang -### -fintegrated-as -gz=invalid -x assembler -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_INVALID %s
 // RUN: %clang -### -fintegrated-as -gz=invalid -c %s 2>&1 | FileCheck -check-prefix CHECK-OPT_GZ_EQ_INVALID %s
 // CHECK-OPT_GZ_EQ_INVALID: error: unsupported argument 'invalid' to option 'gz='
diff --git a/clang/tools/driver/cc1as_main.cpp b/clang/tools/driver/cc1as_main.cpp
--- a/clang/tools/driver/cc1as_main.cpp
+++ b/clang/tools/driver/cc1as_main.cpp
@@ -228,7 +228,6 @@
         llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
             .Case("none", llvm::DebugCompressionType::None)
             .Case("zlib", llvm::DebugCompressionType::Z)
-            .Case("zlib-gnu", llvm::DebugCompressionType::GNU)
             .Default(llvm::DebugCompressionType::None);
   }