diff --git a/llvm/docs/CommandGuide/llvm-objcopy.rst b/llvm/docs/CommandGuide/llvm-objcopy.rst
--- a/llvm/docs/CommandGuide/llvm-objcopy.rst
+++ b/llvm/docs/CommandGuide/llvm-objcopy.rst
@@ -84,6 +84,19 @@
  For MachO objects, ``<section>`` must be formatted as
  ``<segment name>,<section name>``.
 
+.. option:: --redefine-sym <old>=<new>
+
+ Rename symbols called ``<old>`` to ``<new>`` in the output. Can be specified
+ multiple times to rename multiple symbols.
+
+.. option:: --redefine-syms <filename>
+
+ Rename symbols in the output as described in the file ``<filename>``. In the
+ file, each line represents a single symbol to rename, with the old name and new
+ name separated by an equals sign. Leading and trailing whitespace is ignored,
+ as is anything following a '#'. Can be specified multiple times to read names
+ from multiple files.
+
 .. option:: --regex
 
  If specified, symbol and section names specified by other switches are treated
@@ -378,19 +391,6 @@
 
  Preserve access and modification timestamps in the output.
 
-.. option:: --redefine-sym <old>=<new>
-
- Rename symbols called ``<old>`` to ``<new>`` in the output. Can be specified
- multiple times to rename multiple symbols.
-
-.. option:: --redefine-syms <filename>
-
- Rename symbols in the output as described in the file ``<filename>``. In the
- file, each line represents a single symbol to rename, with the old name and new
- name separated by an equals sign. Leading and trailing whitespace is ignored,
- as is anything following a '#'. Can be specified multiple times to read names
- from multiple files.
-
 .. option:: --rename-section <old>=<new>[,<flag>,...]
 
  Rename sections called ``<old>`` to ``<new>`` in the output, and apply any
diff --git a/llvm/test/tools/llvm-objcopy/COFF/redefine-symbol.test b/llvm/test/tools/llvm-objcopy/COFF/redefine-symbol.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-objcopy/COFF/redefine-symbol.test
@@ -0,0 +1,67 @@
+# RUN: yaml2obj %s -o %t
+
+# RUN: llvm-objcopy --redefine-sym func=cnuf --redefine-sym foo=bar %t %t2
+# RUN: llvm-readobj --symbols %t2 | FileCheck %s
+
+# RUN: echo 'func cnuf #rename func' > %t.rename.txt
+# RUN: echo 'foo bar' >> %t.rename.txt
+# RUN: llvm-objcopy --redefine-syms %t.rename.txt %t %t3
+# RUN: cmp %t2 %t3
+
+# CHECK:      Symbol {
+# CHECK:      Symbol {
+# CHECK:      Symbol {
+# CHECK-NEXT:   Name: cnuf
+# CHECK-NEXT:   Value: 0
+# CHECK-NEXT:   Section: .text (1)
+# CHECK-NEXT:   BaseType: Null (0x0)
+# CHECK-NEXT:   ComplexType: Function (0x2)
+# CHECK-NEXT:   StorageClass: External (0x2)
+# CHECK-NEXT:   AuxSymbolCount: 0
+# CHECK-NEXT: }
+# CHECK-NEXT: Symbol {
+# CHECK-NEXT:   Name: bar
+# CHECK-NEXT:   Value: 0
+# CHECK-NEXT:   Section: .rdata (2)
+# CHECK-NEXT:   BaseType: Null (0x0)
+# CHECK-NEXT:   ComplexType: Null (0x0)
+# CHECK-NEXT:   StorageClass: External (0x2)
+# CHECK-NEXT:   AuxSymbolCount: 0
+# CHECK-NEXT: }
+
+--- !COFF
+header:
+  Machine:         IMAGE_FILE_MACHINE_AMD64
+  Characteristics: [  ]
+sections:
+  - Name:            .text
+    Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
+  - Name:            .rdata
+    Characteristics: [  ]
+    Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ ]
+symbols:
+  - Name:            .text
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            .rdata
+    Value:           0
+    SectionNumber:   2
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_STATIC
+  - Name:            func
+    Value:           0
+    SectionNumber:   1
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_FUNCTION
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+  - Name:            foo
+    Value:           0
+    SectionNumber:   2
+    SimpleType:      IMAGE_SYM_TYPE_NULL
+    ComplexType:     IMAGE_SYM_DTYPE_NULL
+    StorageClass:    IMAGE_SYM_CLASS_EXTERNAL
+...
diff --git a/llvm/tools/llvm-objcopy/COFF/COFFObjcopy.cpp b/llvm/tools/llvm-objcopy/COFF/COFFObjcopy.cpp
--- a/llvm/tools/llvm-objcopy/COFF/COFFObjcopy.cpp
+++ b/llvm/tools/llvm-objcopy/COFF/COFFObjcopy.cpp
@@ -131,6 +131,12 @@
     if (Error E = Obj.markSymbols())
       return E;
 
+  for (Symbol &Sym : Obj.getMutableSymbols()) {
+    auto I = Config.SymbolsToRename.find(Sym.Name);
+    if (I != Config.SymbolsToRename.end())
+      Sym.Name = I->getValue();
+  }
+
   // Actually do removals of symbols.
   Obj.removeSymbols([&](const Symbol &Sym) {
     // For StripAll, all relocations have been stripped and we remove all
@@ -200,10 +206,9 @@
       !Config.SymbolsToLocalize.empty() || !Config.SymbolsToWeaken.empty() ||
       !Config.SymbolsToKeepGlobal.empty() || !Config.SectionsToRename.empty() ||
       !Config.SetSectionAlignment.empty() || !Config.SetSectionFlags.empty() ||
-      !Config.SymbolsToRename.empty() || Config.ExtractDWO ||
-      Config.KeepFileSymbols || Config.LocalizeHidden || Config.PreserveDates ||
-      Config.StripDWO || Config.StripNonAlloc || Config.StripSections ||
-      Config.Weaken || Config.DecompressDebugSections ||
+      Config.ExtractDWO || Config.KeepFileSymbols || Config.LocalizeHidden ||
+      Config.PreserveDates || Config.StripDWO || Config.StripNonAlloc ||
+      Config.StripSections || Config.Weaken || Config.DecompressDebugSections ||
       Config.DiscardMode == DiscardType::Locals ||
       !Config.SymbolsToAdd.empty() || Config.EntryExpr) {
     return createStringError(llvm::errc::invalid_argument,