diff --git a/llvm/test/tools/llvm-objdump/X86/disasm-specific-funcs.test b/llvm/test/tools/llvm-objdump/X86/disasm-specific-funcs.test
--- a/llvm/test/tools/llvm-objdump/X86/disasm-specific-funcs.test
+++ b/llvm/test/tools/llvm-objdump/X86/disasm-specific-funcs.test
@@ -1,5 +1,5 @@
 // RUN: yaml2obj -o %t.out %p/Inputs/simple-executable-x86_64.yaml
-// RUN: llvm-objdump -d %t.out -df=main | FileCheck %s
+// RUN: llvm-objdump -d %t.out -disassemble-functions=main | FileCheck %s
 
 // CHECK:              Disassembly of section .anothertext:
 // CHECK-NEXT:         main:
diff --git a/llvm/test/tools/llvm-objdump/option-grouping.test b/llvm/test/tools/llvm-objdump/option-grouping.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-objdump/option-grouping.test
@@ -0,0 +1,2 @@
+// RUN: llvm-objdump -afxz %p/Inputs/private-headers-x86_64.elf 2>&1 | FileCheck %s
+// CHECK-NOT: Unknown command line argument
diff --git a/llvm/tools/llvm-objdump/MachODump.cpp b/llvm/tools/llvm-objdump/MachODump.cpp
--- a/llvm/tools/llvm-objdump/MachODump.cpp
+++ b/llvm/tools/llvm-objdump/MachODump.cpp
@@ -59,7 +59,7 @@
 using namespace object;
 
 static cl::opt<bool>
-    UseDbg("g",
+    UseDbg("g", cl::Grouping,
            cl::desc("Print line information from debug info if available"));
 
 static cl::opt<std::string> DSYMFile("dsym",
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -79,7 +79,8 @@
     llvm::AllHeaders("all-headers",
                      cl::desc("Display all available header information"));
 static cl::alias AllHeadersShort("x", cl::desc("Alias for --all-headers"),
-                                 cl::NotHidden, cl::aliasopt(AllHeaders));
+                                 cl::NotHidden, cl::Grouping,
+                                 cl::aliasopt(AllHeaders));
 
 static cl::list<std::string>
 InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore);
@@ -88,22 +89,25 @@
 llvm::Disassemble("disassemble",
   cl::desc("Display assembler mnemonics for the machine instructions"));
 static cl::alias Disassembled("d", cl::desc("Alias for --disassemble"),
-                              cl::NotHidden, cl::aliasopt(Disassemble));
+                              cl::NotHidden, cl::Grouping,
+                              cl::aliasopt(Disassemble));
 
 cl::opt<bool>
 llvm::DisassembleAll("disassemble-all",
   cl::desc("Display assembler mnemonics for the machine instructions"));
 static cl::alias DisassembleAlld("D", cl::desc("Alias for --disassemble-all"),
-                                 cl::NotHidden, cl::aliasopt(DisassembleAll));
+                                 cl::NotHidden, cl::Grouping,
+                                 cl::aliasopt(DisassembleAll));
 
 cl::opt<bool> llvm::Demangle("demangle", cl::desc("Demangle symbols names"),
                              cl::init(false));
 
 static cl::alias DemangleShort("C", cl::desc("Alias for --demangle"),
-                               cl::NotHidden, cl::aliasopt(llvm::Demangle));
+                               cl::NotHidden, cl::Grouping,
+                               cl::aliasopt(llvm::Demangle));
 
 static cl::list<std::string>
-DisassembleFunctions("df",
+DisassembleFunctions("disassemble-functions",
                      cl::CommaSeparated,
                      cl::desc("List of functions to disassemble"));
 static StringSet<> DisasmFuncsSet;
@@ -112,14 +116,14 @@
 llvm::Relocations("reloc",
                   cl::desc("Display the relocation entries in the file"));
 static cl::alias RelocationsShort("r", cl::desc("Alias for --reloc"),
-                                  cl::NotHidden,
+                                  cl::NotHidden, cl::Grouping,
                                   cl::aliasopt(llvm::Relocations));
 
 cl::opt<bool>
 llvm::DynamicRelocations("dynamic-reloc",
   cl::desc("Display the dynamic relocation entries in the file"));
 static cl::alias DynamicRelocationsd("R", cl::desc("Alias for --dynamic-reloc"),
-                                     cl::NotHidden,
+                                     cl::NotHidden, cl::Grouping,
                                      cl::aliasopt(DynamicRelocations));
 
 cl::opt<bool>
@@ -127,12 +131,12 @@
                           cl::desc("Display the content of each section"));
 static cl::alias SectionContentsShort("s",
                                       cl::desc("Alias for --full-contents"),
-                                      cl::NotHidden,
+                                      cl::NotHidden, cl::Grouping,
                                       cl::aliasopt(SectionContents));
 
 cl::opt<bool> llvm::SymbolTable("syms", cl::desc("Display the symbol table"));
 static cl::alias SymbolTableShort("t", cl::desc("Alias for --syms"),
-                                  cl::NotHidden,
+                                  cl::NotHidden, cl::Grouping,
                                   cl::aliasopt(llvm::SymbolTable));
 
 cl::opt<bool>
@@ -157,7 +161,7 @@
 static cl::opt<bool>
 MachOOpt("macho", cl::desc("Use MachO specific object file parser"));
 static cl::alias MachOm("m", cl::desc("Alias for --macho"), cl::NotHidden,
-                        cl::aliasopt(MachOOpt));
+                        cl::Grouping, cl::aliasopt(MachOOpt));
 
 cl::opt<std::string>
 llvm::TripleName("triple", cl::desc("Target triple to disassemble for, "
@@ -182,7 +186,7 @@
                                      cl::aliasopt(SectionHeaders));
 static cl::alias SectionHeadersShorter("h",
                                        cl::desc("Alias for --section-headers"),
-                                       cl::NotHidden,
+                                       cl::NotHidden, cl::Grouping,
                                        cl::aliasopt(SectionHeaders));
 
 static cl::opt<bool>
@@ -213,7 +217,8 @@
 llvm::UnwindInfo("unwind-info", cl::desc("Display unwind information"));
 
 static cl::alias UnwindInfoShort("u", cl::desc("Alias for --unwind-info"),
-                                 cl::NotHidden, cl::aliasopt(UnwindInfo));
+                                 cl::NotHidden, cl::Grouping,
+                                 cl::aliasopt(UnwindInfo));
 
 cl::opt<bool>
 llvm::PrivateHeaders("private-headers",
@@ -226,7 +231,7 @@
 
 static cl::alias PrivateHeadersShort("p",
                                      cl::desc("Alias for --private-headers"),
-                                     cl::NotHidden,
+                                     cl::NotHidden, cl::Grouping,
                                      cl::aliasopt(PrivateHeaders));
 
 cl::opt<bool> llvm::FileHeaders(
@@ -234,14 +239,16 @@
     cl::desc("Display the contents of the overall file header"));
 
 static cl::alias FileHeadersShort("f", cl::desc("Alias for --file-headers"),
-                                  cl::NotHidden, cl::aliasopt(FileHeaders));
+                                  cl::NotHidden, cl::Grouping,
+                                  cl::aliasopt(FileHeaders));
 
 cl::opt<bool>
     llvm::ArchiveHeaders("archive-headers",
                          cl::desc("Display archive header information"));
 
 cl::alias ArchiveHeadersShort("a", cl::desc("Alias for --archive-headers"),
-                              cl::NotHidden, cl::aliasopt(ArchiveHeaders));
+                              cl::NotHidden, cl::Grouping,
+                              cl::aliasopt(ArchiveHeaders));
 
 cl::opt<bool>
     llvm::PrintImmHex("print-imm-hex",
@@ -260,14 +267,15 @@
         "Display source inlined with disassembly. Implies disassemble object"));
 
 cl::alias PrintSourceShort("S", cl::desc("Alias for -source"), cl::NotHidden,
-                           cl::aliasopt(PrintSource));
+                           cl::Grouping, cl::aliasopt(PrintSource));
 
 cl::opt<bool> PrintLines("line-numbers",
                          cl::desc("Display source line numbers with "
                                   "disassembly. Implies disassemble object"));
 
 cl::alias PrintLinesShort("l", cl::desc("Alias for -line-numbers"),
-                          cl::NotHidden, cl::aliasopt(PrintLines));
+                          cl::NotHidden, cl::Grouping,
+                          cl::aliasopt(PrintLines));
 
 cl::opt<unsigned long long>
     StartAddress("start-address", cl::desc("Disassemble beginning at address"),
@@ -282,7 +290,7 @@
                 cl::desc("Do not skip blocks of zeroes when disassembling"));
 cl::alias DisassembleZeroesShort("z",
                                  cl::desc("Alias for --disassemble-zeroes"),
-                                 cl::NotHidden,
+                                 cl::NotHidden, cl::Grouping,
                                  cl::aliasopt(DisassembleZeroes));
 
 static StringRef ToolName;