Index: lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
===================================================================
--- lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
+++ lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
@@ -37,6 +37,8 @@
   // different.
   bool hasNOP() const { return STI.getFeatureBits()[ARM::HasV6T2Ops]; }
 
+  Optional<MCFixupKind> getFixupKind(StringRef Name) const override;
+
   const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
 
   bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
Index: lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
===================================================================
--- lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
+++ lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
@@ -46,12 +46,19 @@
 };
 } // end anonymous namespace
 
+Optional<MCFixupKind> ARMAsmBackend::getFixupKind(StringRef Name) const {
+  if (Name == "R_ARM_NONE")
+    return (MCFixupKind)ARM::fixup_arm_NONE;
+  return MCAsmBackend::getFixupKind(Name);
+}
+
 const MCFixupKindInfo &ARMAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
   const static MCFixupKindInfo InfosLE[ARM::NumTargetFixupKinds] = {
       // This table *must* be in the order that the fixup_* kinds are defined in
       // ARMFixupKinds.h.
       //
       // Name                      Offset (bits) Size (bits)     Flags
+      {"fixup_arm_NONE", 0, 0, 0},
       {"fixup_arm_ldst_pcrel_12", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
       {"fixup_t2_ldst_pcrel_12", 0, 32,
        MCFixupKindInfo::FKF_IsPCRel |
@@ -103,6 +110,7 @@
       // ARMFixupKinds.h.
       //
       // Name                      Offset (bits) Size (bits)     Flags
+      {"fixup_arm_NONE", 0, 0, 0},
       {"fixup_arm_ldst_pcrel_12", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
       {"fixup_t2_ldst_pcrel_12", 0, 32,
        MCFixupKindInfo::FKF_IsPCRel |
@@ -383,6 +391,8 @@
   default:
     Ctx.reportError(Fixup.getLoc(), "bad relocation fixup type");
     return 0;
+  case ARM::fixup_arm_NONE:
+    return 0;
   case FK_Data_1:
   case FK_Data_2:
   case FK_Data_4:
@@ -803,6 +813,9 @@
   default:
     llvm_unreachable("Unknown fixup kind!");
 
+  case ARM::fixup_arm_NONE:
+    return 0;
+
   case FK_Data_1:
   case ARM::fixup_arm_thumb_bcc:
   case ARM::fixup_arm_thumb_cp:
Index: lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
===================================================================
--- lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
+++ lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
@@ -196,6 +196,8 @@
     case MCSymbolRefExpr::VK_ARM_TLSDESCSEQ:
       return ELF::R_ARM_TLS_DESCSEQ;
     }
+  case ARM::fixup_arm_NONE:
+    return ELF::R_ARM_NONE;
   case ARM::fixup_arm_condbranch:
   case ARM::fixup_arm_uncondbranch:
     return ELF::R_ARM_JUMP24;
Index: lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h
===================================================================
--- lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h
+++ lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h
@@ -14,8 +14,11 @@
 namespace llvm {
 namespace ARM {
 enum Fixups {
+  // Fixup resulting in R_ARM_NONE.
+  fixup_arm_NONE = FirstTargetFixupKind,
+
   // 12-bit PC relative relocation for symbol addresses
-  fixup_arm_ldst_pcrel_12 = FirstTargetFixupKind,
+  fixup_arm_ldst_pcrel_12,
 
   // Equivalent to fixup_arm_ldst_pcrel_12, with the 16-bit halfwords reordered.
   fixup_t2_ldst_pcrel_12,
Index: test/MC/ARM/reloc-directive.s
===================================================================
--- /dev/null
+++ test/MC/ARM/reloc-directive.s
@@ -0,0 +1,18 @@
+# RUN: llvm-mc -filetype=obj -triple=armv7-linux-gnueabi %s -o %t
+# RUN: llvm-readobj -r %t | FileCheck %s
+# RUN: llvm-readelf -x .data %t | FileCheck --check-prefix=HEX %s
+
+# RUN: llvm-mc -filetype=obj -triple=armv7eb-linux-gnueabi %s -o %t
+# RUN: llvm-readobj -r %t | FileCheck %s
+# RUN: llvm-readelf -x .data %t | FileCheck --check-prefix=HEX %s
+
+.data
+  .reloc 4, R_ARM_NONE, .data
+  .reloc 0, R_ARM_NONE, .data+4
+  .space 8
+
+# Addends are ignored.
+# CHECK:      0x4 R_ARM_NONE .data 0x0
+# CHECK-NEXT: 0x0 R_ARM_NONE .data 0x0
+
+# HEX: 0x00000000 00000000 00000000