diff --git a/lld/include/lld/Core/DefinedAtom.h b/lld/include/lld/Core/DefinedAtom.h
index e855d6a457e4..9ba2428a9a6c 100644
--- a/lld/include/lld/Core/DefinedAtom.h
+++ b/lld/include/lld/Core/DefinedAtom.h
@@ -253,11 +253,6 @@ public:
   /// is R__.
   virtual ContentPermissions permissions() const;
 
-  /// \brief only applicable to ARM code. Tells the linker if the code uses
-  /// thumb or arm instructions.  The linker needs to know this to set the low
-  /// bit of pointers to thumb functions.
-  virtual bool isThumb() const = 0;
-
   /// \brief means this is a zero size atom that exists to provide an alternate
   /// name for another atom.  Alias atoms must have a special Reference to the
   /// atom they alias which the layout engine recognizes and forces the alias
diff --git a/lld/include/lld/ReaderWriter/Simple.h b/lld/include/lld/ReaderWriter/Simple.h
index 2baa114bdfba..af105bb2fbfa 100644
--- a/lld/include/lld/ReaderWriter/Simple.h
+++ b/lld/include/lld/ReaderWriter/Simple.h
@@ -128,8 +128,6 @@ public:
     return DefinedAtom::deadStripNormal;
   }
 
-  virtual bool isThumb() const { return false; }
-
   virtual bool isAlias() const { return false; }
 
   virtual DefinedAtom::reference_iterator begin() const {
diff --git a/lld/lib/ReaderWriter/CoreTargetInfo.cpp b/lld/lib/ReaderWriter/CoreTargetInfo.cpp
index 3cc58db22299..17f60cce18af 100644
--- a/lld/lib/ReaderWriter/CoreTargetInfo.cpp
+++ b/lld/lib/ReaderWriter/CoreTargetInfo.cpp
@@ -84,10 +84,6 @@ public:
     return DefinedAtom::permR_X;
   }
 
-  virtual bool isThumb() const {
-    return false;
-  }
-
   virtual bool isAlias() const {
     return false;
   }
@@ -180,10 +176,6 @@ public:
     return DefinedAtom::permRW_;
   }
 
-  virtual bool isThumb() const {
-    return false;
-  }
-
   virtual bool isAlias() const {
     return false;
   }
diff --git a/lld/lib/ReaderWriter/ELF/Atoms.h b/lld/lib/ReaderWriter/ELF/Atoms.h
index 93de82c3e622..18933f648d10 100644
--- a/lld/lib/ReaderWriter/ELF/Atoms.h
+++ b/lld/lib/ReaderWriter/ELF/Atoms.h
@@ -439,12 +439,6 @@ public:
     }
   }
 
-  // Many non ARM architectures use ELF file format This not really a place to
-  // put a architecture specific method in an atom. A better approach is needed.
-  virtual bool isThumb() const {
-    return false;
-  }
-
   // FIXME: Not Sure if ELF supports alias atoms. Find out more.
   virtual bool isAlias() const {
     return false;
diff --git a/lld/lib/ReaderWriter/Native/ReaderNative.cpp b/lld/lib/ReaderWriter/Native/ReaderNative.cpp
index 41fc0eee7ce2..9df490e7bef1 100644
--- a/lld/lib/ReaderWriter/Native/ReaderNative.cpp
+++ b/lld/lib/ReaderWriter/Native/ReaderNative.cpp
@@ -94,10 +94,6 @@ public:
      return (DefinedAtom::ContentPermissions)(attributes().permissions);
   }
 
-  virtual bool isThumb() const {
-     return false; //(attributes().thumb != 0);
-  }
-
   virtual bool isAlias() const {
      return (attributes().alias != 0);
   }
diff --git a/lld/lib/ReaderWriter/Native/WriterNative.cpp b/lld/lib/ReaderWriter/Native/WriterNative.cpp
index c968a751128d..93869da4e368 100644
--- a/lld/lib/ReaderWriter/Native/WriterNative.cpp
+++ b/lld/lib/ReaderWriter/Native/WriterNative.cpp
@@ -441,7 +441,6 @@ private:
                           = atom.sectionChoice() << 4 | atom.sectionPosition();
     attrs.deadStrip         = atom.deadStrip();
     attrs.permissions       = atom.permissions();
-    //attrs.thumb             = atom.isThumb();
     attrs.alias             = atom.isAlias();
   }
 
diff --git a/lld/lib/ReaderWriter/PECOFF/ReaderCOFF.cpp b/lld/lib/ReaderWriter/PECOFF/ReaderCOFF.cpp
index 2a5d542f3afd..159a6f9d18a6 100644
--- a/lld/lib/ReaderWriter/PECOFF/ReaderCOFF.cpp
+++ b/lld/lib/ReaderWriter/PECOFF/ReaderCOFF.cpp
@@ -176,10 +176,6 @@ public:
     return perm___;
   }
 
-  virtual bool isThumb() const {
-    return false;
-  }
-
   virtual bool isAlias() const {
     return false;
   }
diff --git a/lld/lib/ReaderWriter/YAML/ReaderWriterYAML.cpp b/lld/lib/ReaderWriter/YAML/ReaderWriterYAML.cpp
index 747d16156739..1852ec98b155 100644
--- a/lld/lib/ReaderWriter/YAML/ReaderWriterYAML.cpp
+++ b/lld/lib/ReaderWriter/YAML/ReaderWriterYAML.cpp
@@ -933,7 +933,6 @@ struct MappingTraits<const lld::DefinedAtom*> {
     virtual SectionPosition    sectionPosition() const{return _sectionPosition;}
     virtual DeadStripKind      deadStrip() const     { return _deadStrip;  }
     virtual ContentPermissions permissions() const   { return _permissions; }
-    virtual bool               isThumb() const       { return false; }
     virtual bool               isAlias() const       { return false; }
     ArrayRef<uint8_t>          rawContent() const    {
       return ArrayRef<uint8_t>(