From 61f848360f4c165ca21d34fc765bb68b25203553 Mon Sep 17 00:00:00 2001
From: Logan Chien <tzuhsiang.chien@gmail.com>
Date: Wed, 11 Dec 2013 17:16:25 +0000
Subject: [arm] Implement ARM .arch directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197052 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/MC/MCStreamer.h                   |   1 +
 lib/Target/ARM/AsmParser/ARMAsmParser.cpp      |  15 ++-
 lib/Target/ARM/MCTargetDesc/ARMArchName.def    |  45 ++++++++
 lib/Target/ARM/MCTargetDesc/ARMArchName.h      |  26 +++++
 lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp | 139 ++++++++++++++++++++++++-
 test/MC/ARM/directive-arch-armv2.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv2a.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv3.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv3m.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv4.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv4t.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv5.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv5t.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv5te.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv6-m.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv6.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv6j.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv6t2.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv6z.s            |  30 ++++++
 test/MC/ARM/directive-arch-armv6zk.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv7-a.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv7-m.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv7-r.s           |  30 ++++++
 test/MC/ARM/directive-arch-armv7.s             |  30 ++++++
 test/MC/ARM/directive-arch-armv8-a.s           |  31 ++++++
 test/MC/ARM/directive-arch-iwmmxt.s            |  30 ++++++
 test/MC/ARM/directive-arch-iwmmxt2.s           |  31 ++++++
 27 files changed, 886 insertions(+), 2 deletions(-)
 create mode 100644 lib/Target/ARM/MCTargetDesc/ARMArchName.def
 create mode 100644 lib/Target/ARM/MCTargetDesc/ARMArchName.h
 create mode 100644 test/MC/ARM/directive-arch-armv2.s
 create mode 100644 test/MC/ARM/directive-arch-armv2a.s
 create mode 100644 test/MC/ARM/directive-arch-armv3.s
 create mode 100644 test/MC/ARM/directive-arch-armv3m.s
 create mode 100644 test/MC/ARM/directive-arch-armv4.s
 create mode 100644 test/MC/ARM/directive-arch-armv4t.s
 create mode 100644 test/MC/ARM/directive-arch-armv5.s
 create mode 100644 test/MC/ARM/directive-arch-armv5t.s
 create mode 100644 test/MC/ARM/directive-arch-armv5te.s
 create mode 100644 test/MC/ARM/directive-arch-armv6-m.s
 create mode 100644 test/MC/ARM/directive-arch-armv6.s
 create mode 100644 test/MC/ARM/directive-arch-armv6j.s
 create mode 100644 test/MC/ARM/directive-arch-armv6t2.s
 create mode 100644 test/MC/ARM/directive-arch-armv6z.s
 create mode 100644 test/MC/ARM/directive-arch-armv6zk.s
 create mode 100644 test/MC/ARM/directive-arch-armv7-a.s
 create mode 100644 test/MC/ARM/directive-arch-armv7-m.s
 create mode 100644 test/MC/ARM/directive-arch-armv7-r.s
 create mode 100644 test/MC/ARM/directive-arch-armv7.s
 create mode 100644 test/MC/ARM/directive-arch-armv8-a.s
 create mode 100644 test/MC/ARM/directive-arch-iwmmxt.s
 create mode 100644 test/MC/ARM/directive-arch-iwmmxt2.s

diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 5bf4fb1c7e..fce70dcad9 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -93,6 +93,7 @@ public:
   virtual void emitAttribute(unsigned Attribute, unsigned Value) = 0;
   virtual void emitTextAttribute(unsigned Attribute, StringRef String) = 0;
   virtual void emitFPU(unsigned FPU) = 0;
+  virtual void emitArch(unsigned Arch) = 0;
   virtual void finishAttributeSection() = 0;
 };
 
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 2ad0a51815..bf73ba6ee6 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -12,6 +12,7 @@
 #include "ARMFeatures.h"
 #include "llvm/MC/MCTargetAsmParser.h"
 #include "MCTargetDesc/ARMAddressingModes.h"
+#include "MCTargetDesc/ARMArchName.h"
 #include "MCTargetDesc/ARMBaseInfo.h"
 #include "MCTargetDesc/ARMMCExpr.h"
 #include "llvm/ADT/BitVector.h"
@@ -8006,7 +8007,19 @@ bool ARMAsmParser::parseDirectiveUnreq(SMLoc L) {
 /// parseDirectiveArch
 ///  ::= .arch token
 bool ARMAsmParser::parseDirectiveArch(SMLoc L) {
-  return true;
+  StringRef Arch = getParser().parseStringToEndOfStatement().trim();
+
+  unsigned ID = StringSwitch<unsigned>(Arch)
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+    .Case(NAME, ARM::ID)
+#include "MCTargetDesc/ARMArchName.def"
+    .Default(ARM::INVALID_ARCH);
+
+  if (ID == ARM::INVALID_ARCH)
+    return Error(L, "Unknown arch name");
+
+  getTargetStreamer().emitArch(ID);
+  return false;
 }
 
 /// parseDirectiveEabiAttr
diff --git a/lib/Target/ARM/MCTargetDesc/ARMArchName.def b/lib/Target/ARM/MCTargetDesc/ARMArchName.def
new file mode 100644
index 0000000000..37e814e072
--- /dev/null
+++ b/lib/Target/ARM/MCTargetDesc/ARMArchName.def
@@ -0,0 +1,45 @@
+//===-- ARMArchName.def - List of the ARM arch names ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the list of the supported ARM architecture names,
+// i.e. the supported value for -march= option.
+//
+//===----------------------------------------------------------------------===//
+
+// NOTE: NO INCLUDE GUARD DESIRED!
+
+#ifndef ARM_ARCH_NAME
+#error "You must define ARM_ARCH_NAME before including ARMArchName.def"
+#endif
+
+// ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH)
+ARM_ARCH_NAME("armv2",   ARMV2,   "2",       v4)
+ARM_ARCH_NAME("armv2a",  ARMV2A,  "2A",      v4)
+ARM_ARCH_NAME("armv3",   ARMV3,   "3",       v4)
+ARM_ARCH_NAME("armv3m",  ARMV3M,  "3M",      v4)
+ARM_ARCH_NAME("armv4",   ARMV4,   "4",       v4)
+ARM_ARCH_NAME("armv4t",  ARMV4T,  "4T",      v4T)
+ARM_ARCH_NAME("armv5",   ARMV5,   "5",       v5T)
+ARM_ARCH_NAME("armv5t",  ARMV5T,  "5T",      v5T)
+ARM_ARCH_NAME("armv5te", ARMV5TE, "5TE",     v5TE)
+ARM_ARCH_NAME("armv6",   ARMV6,   "6",       v6)
+ARM_ARCH_NAME("armv6j",  ARMV6J,  "6J",      v6)
+ARM_ARCH_NAME("armv6t2", ARMV6T2, "6T2",     v6T2)
+ARM_ARCH_NAME("armv6z",  ARMV6Z,  "6Z",      v6KZ)
+ARM_ARCH_NAME("armv6zk", ARMV6ZK, "6ZK",     v6KZ)
+ARM_ARCH_NAME("armv6-m", ARMV6M,  "6-M",     v6_M)
+ARM_ARCH_NAME("armv7",   ARMV7,   "7",       v7)
+ARM_ARCH_NAME("armv7-a", ARMV7A,  "7-A",     v7)
+ARM_ARCH_NAME("armv7-r", ARMV7R,  "7-R",     v7)
+ARM_ARCH_NAME("armv7-m", ARMV7M,  "7-M",     v7)
+ARM_ARCH_NAME("armv8-a", ARMV8A,  "8-A",     v8)
+ARM_ARCH_NAME("iwmmxt",  IWMMXT,  "iwmmxt",  v5TE)
+ARM_ARCH_NAME("iwmmxt2", IWMMXT2, "iwmmxt2", v5TE)
+
+#undef ARM_ARCH_NAME
diff --git a/lib/Target/ARM/MCTargetDesc/ARMArchName.h b/lib/Target/ARM/MCTargetDesc/ARMArchName.h
new file mode 100644
index 0000000000..d0de9ccb8a
--- /dev/null
+++ b/lib/Target/ARM/MCTargetDesc/ARMArchName.h
@@ -0,0 +1,26 @@
+//===-- ARMArchName.h - List of the ARM arch names --------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ARMARCHNAME_H
+#define ARMARCHNAME_H
+
+namespace llvm {
+namespace ARM {
+
+enum ArchKind {
+  INVALID_ARCH = 0
+
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) , ID
+#include "ARMArchName.def"
+};
+
+} // namespace ARM
+} // namespace llvm
+
+#endif // ARMARCHNAME_H
diff --git a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index 471897de5c..1dc57768f6 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -14,6 +14,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "ARMBuildAttrs.h"
+#include "ARMArchName.h"
 #include "ARMFPUName.h"
 #include "ARMRegisterInfo.h"
 #include "ARMUnwindOp.h"
@@ -61,6 +62,42 @@ static const char *GetFPUName(unsigned ID) {
   return NULL;
 }
 
+static const char *GetArchName(unsigned ID) {
+  switch (ID) {
+  default:
+    llvm_unreachable("Unknown ARCH kind");
+    break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+  case ARM::ID: return NAME;
+#include "ARMArchName.def"
+  }
+  return NULL;
+}
+
+static const char *GetArchDefaultCPUName(unsigned ID) {
+  switch (ID) {
+  default:
+    llvm_unreachable("Unknown ARCH kind");
+    break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+  case ARM::ID: return DEFAULT_CPU_NAME;
+#include "ARMArchName.def"
+  }
+  return NULL;
+}
+
+static unsigned GetArchDefaultCPUArch(unsigned ID) {
+  switch (ID) {
+  default:
+    llvm_unreachable("Unknown ARCH kind");
+    break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+  case ARM::ID: return ARMBuildAttrs::DEFAULT_CPU_ARCH;
+#include "ARMArchName.def"
+  }
+  return 0;
+}
+
 namespace {
 
 class ARMELFStreamer;
@@ -82,6 +119,7 @@ class ARMTargetAsmStreamer : public ARMTargetStreamer {
   virtual void switchVendor(StringRef Vendor);
   virtual void emitAttribute(unsigned Attribute, unsigned Value);
   virtual void emitTextAttribute(unsigned Attribute, StringRef String);
+  virtual void emitArch(unsigned Arch);
   virtual void emitFPU(unsigned FPU);
   virtual void finishAttributeSection();
 
@@ -143,6 +181,9 @@ void ARMTargetAsmStreamer::emitTextAttribute(unsigned Attribute,
     break;
   }
 }
+void ARMTargetAsmStreamer::emitArch(unsigned Arch) {
+  OS << "\t.arch\t" << GetArchName(Arch) << "\n";
+}
 void ARMTargetAsmStreamer::emitFPU(unsigned FPU) {
   OS << "\t.fpu\t" << GetFPUName(FPU) << "\n";
 }
@@ -171,6 +212,7 @@ private:
 
   StringRef CurrentVendor;
   unsigned FPU;
+  unsigned Arch;
   SmallVector<AttributeItem, 64> Contents;
 
   const MCSection *AttributeSection;
@@ -233,6 +275,7 @@ private:
     Contents.push_back(Item);
   }
 
+  void emitArchDefaultAttributes();
   void emitFPUDefaultAttributes();
 
   ARMELFStreamer &getStreamer();
@@ -250,6 +293,7 @@ private:
   virtual void switchVendor(StringRef Vendor);
   virtual void emitAttribute(unsigned Attribute, unsigned Value);
   virtual void emitTextAttribute(unsigned Attribute, StringRef String);
+  virtual void emitArch(unsigned Arch);
   virtual void emitFPU(unsigned FPU);
   virtual void finishAttributeSection();
 
@@ -258,7 +302,7 @@ private:
 public:
   ARMTargetELFStreamer()
     : ARMTargetStreamer(), CurrentVendor("aeabi"), FPU(ARM::INVALID_FPU),
-      AttributeSection(0) {
+      Arch(ARM::INVALID_ARCH), AttributeSection(0) {
   }
 };
 
@@ -491,6 +535,96 @@ void ARMTargetELFStreamer::emitTextAttribute(unsigned Attribute,
                                              StringRef Value) {
   setAttributeItem(Attribute, Value, /* OverwriteExisting= */ true);
 }
+void ARMTargetELFStreamer::emitArch(unsigned Value) {
+  Arch = Value;
+}
+void ARMTargetELFStreamer::emitArchDefaultAttributes() {
+  using namespace ARMBuildAttrs;
+  setAttributeItem(CPU_name, GetArchDefaultCPUName(Arch), false);
+  setAttributeItem(CPU_arch, GetArchDefaultCPUArch(Arch), false);
+
+  switch (Arch) {
+  case ARM::ARMV2:
+  case ARM::ARMV2A:
+  case ARM::ARMV3:
+  case ARM::ARMV3M:
+  case ARM::ARMV4:
+  case ARM::ARMV5:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    break;
+
+  case ARM::ARMV4T:
+  case ARM::ARMV5T:
+  case ARM::ARMV5TE:
+  case ARM::ARMV6:
+  case ARM::ARMV6J:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, Allowed, false);
+    break;
+
+  case ARM::ARMV6T2:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    break;
+
+  case ARM::ARMV6Z:
+  case ARM::ARMV6ZK:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, Allowed, false);
+    setAttributeItem(Virtualization_use, AllowTZ, false);
+    break;
+
+  case ARM::ARMV6M:
+    setAttributeItem(CPU_arch_profile, MicroControllerProfile, false);
+    setAttributeItem(THUMB_ISA_use, Allowed, false);
+    break;
+
+  case ARM::ARMV7:
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    break;
+
+  case ARM::ARMV7A:
+    setAttributeItem(CPU_arch_profile, ApplicationProfile, false);
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    break;
+
+  case ARM::ARMV7R:
+    setAttributeItem(CPU_arch_profile, RealTimeProfile, false);
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    break;
+
+  case ARM::ARMV7M:
+    setAttributeItem(CPU_arch_profile, MicroControllerProfile, false);
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    break;
+
+  case ARM::ARMV8A:
+    setAttributeItem(CPU_arch_profile, ApplicationProfile, false);
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+    setAttributeItem(MPextension_use, Allowed, false);
+    setAttributeItem(Virtualization_use, AllowTZVirtualization, false);
+    break;
+
+  case ARM::IWMMXT:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, Allowed, false);
+    setAttributeItem(WMMX_arch, AllowWMMXv1, false);
+    break;
+
+  case ARM::IWMMXT2:
+    setAttributeItem(ARM_ISA_use, Allowed, false);
+    setAttributeItem(THUMB_ISA_use, Allowed, false);
+    setAttributeItem(WMMX_arch, AllowWMMXv2, false);
+    break;
+
+  default:
+    report_fatal_error("Unknown Arch: " + Twine(Arch));
+    break;
+  }
+}
 void ARMTargetELFStreamer::emitFPU(unsigned Value) {
   FPU = Value;
 }
@@ -597,6 +731,9 @@ void ARMTargetELFStreamer::finishAttributeSection() {
   if (FPU != ARM::INVALID_FPU)
     emitFPUDefaultAttributes();
 
+  if (Arch != ARM::INVALID_ARCH)
+    emitArchDefaultAttributes();
+
   if (Contents.empty())
     return;
 
diff --git a/test/MC/ARM/directive-arch-armv2.s b/test/MC/ARM/directive-arch-armv2.s
new file mode 100644
index 0000000000..a3699226ab
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv2.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv2
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv2 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv2
+
+@ CHECK-ASM: 	.arch	armv2
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 23
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41160000 00616561 62690001 0C000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05320006 010801                      |.2.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv2a.s b/test/MC/ARM/directive-arch-armv2a.s
new file mode 100644
index 0000000000..f118a05999
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv2a.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv2a
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv2a architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv2a
+
+@ CHECK-ASM: 	.arch	armv2a
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 24
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41170000 00616561 62690001 0D000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05324100 06010801                    |.2A.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv3.s b/test/MC/ARM/directive-arch-armv3.s
new file mode 100644
index 0000000000..7b17faaedb
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv3.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv3
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv3 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv3
+
+@ CHECK-ASM: 	.arch	armv3
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 23
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41160000 00616561 62690001 0C000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05330006 010801                      |.3.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv3m.s b/test/MC/ARM/directive-arch-armv3m.s
new file mode 100644
index 0000000000..befecc8bde
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv3m.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv3m
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv3m architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv3m
+
+@ CHECK-ASM: 	.arch	armv3m
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 24
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41170000 00616561 62690001 0D000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05334D00 06010801                    |.3M.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv4.s b/test/MC/ARM/directive-arch-armv4.s
new file mode 100644
index 0000000000..2e0e49f6fd
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv4.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv4
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv4 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv4
+
+@ CHECK-ASM: 	.arch	armv4
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 23
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41160000 00616561 62690001 0C000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05340006 010801                      |.4.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv4t.s b/test/MC/ARM/directive-arch-armv4t.s
new file mode 100644
index 0000000000..6a61a38555
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv4t.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv4t
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv4t architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv4t
+
+@ CHECK-ASM: 	.arch	armv4t
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 26
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41190000 00616561 62690001 0F000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05345400 06020801 0901               |.4T.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv5.s b/test/MC/ARM/directive-arch-armv5.s
new file mode 100644
index 0000000000..4ef4b29b71
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv5.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv5
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv5 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv5
+
+@ CHECK-ASM: 	.arch	armv5
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 23
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41160000 00616561 62690001 0C000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05350006 030801                      |.5.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv5t.s b/test/MC/ARM/directive-arch-armv5t.s
new file mode 100644
index 0000000000..e5950bebca
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv5t.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv5t
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv5t architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv5t
+
+@ CHECK-ASM: 	.arch	armv5t
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 26
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41190000 00616561 62690001 0F000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05355400 06030801 0901               |.5T.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv5te.s b/test/MC/ARM/directive-arch-armv5te.s
new file mode 100644
index 0000000000..9e69e37725
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv5te.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv5te
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv5te architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv5te
+
+@ CHECK-ASM: 	.arch	armv5te
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 27
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411A0000 00616561 62690001 10000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05355445 00060408 010901             |.5TE.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6-m.s b/test/MC/ARM/directive-arch-armv6-m.s
new file mode 100644
index 0000000000..81acd73e1a
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6-m.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6-m
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6-m architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6-m
+
+@ CHECK-ASM: 	.arch	armv6-m
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 27
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411A0000 00616561 62690001 10000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05362D4D 00060B07 4D0901             |.6-M....M..|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6.s b/test/MC/ARM/directive-arch-armv6.s
new file mode 100644
index 0000000000..f8076ceb8f
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6
+
+@ CHECK-ASM: 	.arch	armv6
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 25
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41180000 00616561 62690001 0E000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05360006 06080109 01                 |.6.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6j.s b/test/MC/ARM/directive-arch-armv6j.s
new file mode 100644
index 0000000000..e3369464ea
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6j.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6j
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6j architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6j
+
+@ CHECK-ASM: 	.arch	armv6j
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 26
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41190000 00616561 62690001 0F000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05364A00 06060801 0901               |.6J.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6t2.s b/test/MC/ARM/directive-arch-armv6t2.s
new file mode 100644
index 0000000000..dfaa6d2c63
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6t2.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6t2
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6t2 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6t2
+
+@ CHECK-ASM: 	.arch	armv6t2
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 27
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411A0000 00616561 62690001 10000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05365432 00060808 010902             |.6T2.......|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6z.s b/test/MC/ARM/directive-arch-armv6z.s
new file mode 100644
index 0000000000..077153752f
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6z.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6z
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6z architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6z
+
+@ CHECK-ASM: 	.arch	armv6z
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 28
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411B0000 00616561 62690001 11000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05365A00 06070801 09014401           |.6Z.......D.|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv6zk.s b/test/MC/ARM/directive-arch-armv6zk.s
new file mode 100644
index 0000000000..f6eca4e1e5
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv6zk.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv6zk
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv6zk architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv6zk
+
+@ CHECK-ASM: 	.arch	armv6zk
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 29
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411C0000 00616561 62690001 12000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05365A4B 00060708 01090144 01        |.6ZK.......D.|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv7-a.s b/test/MC/ARM/directive-arch-armv7-a.s
new file mode 100644
index 0000000000..f36dbc0b5f
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv7-a.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv7-a
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv7-a architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv7-a
+
+@ CHECK-ASM: 	.arch	armv7-a
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 29
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411C0000 00616561 62690001 12000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05372D41 00060A07 41080109 02        |.7-A....A....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv7-m.s b/test/MC/ARM/directive-arch-armv7-m.s
new file mode 100644
index 0000000000..e3c99b2cc8
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv7-m.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv7-m
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv7-m architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv7-m
+
+@ CHECK-ASM: 	.arch	armv7-m
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 27
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411A0000 00616561 62690001 10000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05372D4D 00060A07 4D0902             |.7-M....M..|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv7-r.s b/test/MC/ARM/directive-arch-armv7-r.s
new file mode 100644
index 0000000000..9d1316c150
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv7-r.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv7-r
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv7-r architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv7-r
+
+@ CHECK-ASM: 	.arch	armv7-r
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 29
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411C0000 00616561 62690001 12000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05372D52 00060A07 52080109 02        |.7-R....R....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv7.s b/test/MC/ARM/directive-arch-armv7.s
new file mode 100644
index 0000000000..035bcbd9e2
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv7.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for armv7
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv7 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv7
+
+@ CHECK-ASM: 	.arch	armv7
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 23
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41160000 00616561 62690001 0C000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 05370006 0A0902                      |.7.....|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-armv8-a.s b/test/MC/ARM/directive-arch-armv8-a.s
new file mode 100644
index 0000000000..b7cd9b1329
--- /dev/null
+++ b/test/MC/ARM/directive-arch-armv8-a.s
@@ -0,0 +1,31 @@
+@ Test the .arch directive for armv8-a
+
+@ This test case will check the default .ARM.attributes value for the
+@ armv8-a architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	armv8-a
+
+@ CHECK-ASM: 	.arch	armv8-a
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 33
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41200000 00616561 62690001 16000000  |A ...aeabi......|
+@ CHECK-OBJ:      0010: 05382D41 00060E07 41080109 022A0144  |.8-A....A....*.D|
+@ CHECK-OBJ:      0020: 03                                   |.|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-iwmmxt.s b/test/MC/ARM/directive-arch-iwmmxt.s
new file mode 100644
index 0000000000..1a325e1365
--- /dev/null
+++ b/test/MC/ARM/directive-arch-iwmmxt.s
@@ -0,0 +1,30 @@
+@ Test the .arch directive for iwmmxt
+
+@ This test case will check the default .ARM.attributes value for the
+@ iwmmxt architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	iwmmxt
+
+@ CHECK-ASM: 	.arch	iwmmxt
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 32
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 411F0000 00616561 62690001 15000000  |A....aeabi......|
+@ CHECK-OBJ:      0010: 0549574D 4D585400 06040801 09010B01  |.IWMMXT.........|
+@ CHECK-OBJ:    )
diff --git a/test/MC/ARM/directive-arch-iwmmxt2.s b/test/MC/ARM/directive-arch-iwmmxt2.s
new file mode 100644
index 0000000000..42f0789d40
--- /dev/null
+++ b/test/MC/ARM/directive-arch-iwmmxt2.s
@@ -0,0 +1,31 @@
+@ Test the .arch directive for iwmmxt2
+
+@ This test case will check the default .ARM.attributes value for the
+@ iwmmxt2 architecture.
+
+@ RUN: llvm-mc < %s -arch=arm -filetype=asm \
+@ RUN:   | FileCheck %s --check-prefix=CHECK-ASM
+@ RUN: llvm-mc < %s -arch=arm -filetype=obj \
+@ RUN:   | llvm-readobj -s -sd | FileCheck %s --check-prefix=CHECK-OBJ
+
+	.syntax	unified
+	.arch	iwmmxt2
+
+@ CHECK-ASM: 	.arch	iwmmxt2
+
+@ CHECK-OBJ:    Name: .ARM.attributes
+@ CHECK-OBJ:    Type: SHT_ARM_ATTRIBUTES (0x70000003)
+@ CHECK-OBJ:    Flags [ (0x0)
+@ CHECK-OBJ:    ]
+@ CHECK-OBJ:    Address: 0x0
+@ CHECK-OBJ:    Offset: 0x34
+@ CHECK-OBJ:    Size: 33
+@ CHECK-OBJ:    Link: 0
+@ CHECK-OBJ:    Info: 0
+@ CHECK-OBJ:    AddressAlignment: 1
+@ CHECK-OBJ:    EntrySize: 0
+@ CHECK-OBJ:    SectionData (
+@ CHECK-OBJ:      0000: 41200000 00616561 62690001 16000000  |A ...aeabi......|
+@ CHECK-OBJ:      0010: 0549574D 4D585432 00060408 0109010B  |.IWMMXT2........|
+@ CHECK-OBJ:      0020: 02                                   |.|
+@ CHECK-OBJ:    )
-- 
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