Index: llvm/trunk/test/tools/llvm-objdump/ARM/reg-names.s
===================================================================
--- llvm/trunk/test/tools/llvm-objdump/ARM/reg-names.s
+++ llvm/trunk/test/tools/llvm-objdump/ARM/reg-names.s
@@ -12,6 +12,24 @@
 @ RUN:   | FileCheck -check-prefix=ERR %s
 @ ERR: Unrecognized disassembler option: unknown
 
+@ Test that the -M alias can be used flexibly. Create a baseline and ensure
+@ all other combinations are identical.
+@ RUN: llvm-objdump -d --disassembler-options=reg-names-raw %t > %t.raw
+@ RUN: llvm-objdump -d -M reg-names-raw %t > %t.1
+@ RUN: llvm-objdump -d -Mreg-names-raw %t > %t.2
+@ RUN: llvm-objdump -d -Mreg-names-std -Mreg-names-raw %t > %t.3
+@ RUN: llvm-objdump -d -Mreg-names-std,reg-names-raw %t > %t.4
+@ RUN: llvm-objdump -dM reg-names-std,reg-names-raw %t > %t.5
+@ RUN: llvm-objdump -dMreg-names-std,reg-names-raw %t > %t.6
+@ RUN: llvm-objdump -dMreg-names-std -Mreg-names-raw %t > %t.7
+@ RUN: cmp %t.raw %t.1
+@ RUN: cmp %t.raw %t.2
+@ RUN: cmp %t.raw %t.3
+@ RUN: cmp %t.raw %t.4
+@ RUN: cmp %t.raw %t.5
+@ RUN: cmp %t.raw %t.6
+@ RUN: cmp %t.raw %t.7
+
 .text
   add r13, r14, r15
 @ STD: add sp, lr, pc
Index: llvm/trunk/test/tools/llvm-objdump/section-filter.test
===================================================================
--- llvm/trunk/test/tools/llvm-objdump/section-filter.test
+++ llvm/trunk/test/tools/llvm-objdump/section-filter.test
@@ -1,7 +1,24 @@
-// This test checks that --section works correctly
+// This test checks that --section works correctly.
 // RUN: llvm-objdump -h %p/Inputs/section-filter.obj -j=.text \
 // RUN: --section=.bss | FileCheck %s
 
-# CHECK: .text
-# CHECK-NOT: .data
-# CHECK: .bss
\ No newline at end of file
+// CHECK: .text
+// CHECK-NOT: .data
+// CHECK: .bss
+
+// Test that the -j alias can be used flexibly. Create a baseline and ensure
+// all other combinations are identical.
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -h -s --section .symtab > %t.full
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -h -s -j .symtab > %t.1
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -h -s -j=.symtab > %t.2
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -h -s -j.symtab > %t.3
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -hsj .symtab > %t.4
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -hsj=.symtab > %t.5
+// RUN: llvm-objdump %p/Inputs/section-filter.obj -hsj.symtab > %t.6
+
+// RUN: cmp %t.full %t.1
+// RUN: cmp %t.full %t.2
+// RUN: cmp %t.full %t.3
+// RUN: cmp %t.full %t.4
+// RUN: cmp %t.full %t.5
+// RUN: cmp %t.full %t.6
Index: llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
===================================================================
--- llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
+++ llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
@@ -197,7 +197,7 @@
 llvm::FilterSections("section", cl::desc("Operate on the specified sections only. "
                                          "With -macho dump segment,section"));
 cl::alias static FilterSectionsj("j", cl::desc("Alias for --section"),
-                                 cl::NotHidden,
+                                 cl::NotHidden, cl::Grouping, cl::Prefix,
                                  cl::aliasopt(llvm::FilterSections));
 
 cl::list<std::string>
@@ -299,7 +299,8 @@
                         cl::value_desc("options"), cl::CommaSeparated);
 static cl::alias
     DisassemblerOptionsShort("M", cl::desc("Alias for --disassembler-options"),
-                             cl::NotHidden, cl::Prefix, cl::CommaSeparated,
+                             cl::NotHidden, cl::Grouping, cl::Prefix,
+                             cl::CommaSeparated,
                              cl::aliasopt(DisassemblerOptions));
 
 static StringRef ToolName;