Index: cfe/trunk/lib/Basic/Targets/ARM.cpp
===================================================================
--- cfe/trunk/lib/Basic/Targets/ARM.cpp
+++ cfe/trunk/lib/Basic/Targets/ARM.cpp
@@ -334,9 +334,20 @@
     llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags, StringRef CPU,
     const std::vector<std::string> &FeaturesVec) const {
 
+  std::string ArchFeature;
   std::vector<StringRef> TargetFeatures;
   llvm::ARM::ArchKind Arch = llvm::ARM::parseArch(getTriple().getArchName());
 
+  // Map the base architecture to an appropriate target feature, so we don't
+  // rely on the target triple.
+  llvm::ARM::ArchKind CPUArch = llvm::ARM::parseCPUArch(CPU);
+  if (CPUArch == llvm::ARM::ArchKind::INVALID)
+    CPUArch = Arch;
+  if (CPUArch != llvm::ARM::ArchKind::INVALID) {
+    ArchFeature = ("+" + llvm::ARM::getArchName(CPUArch)).str();
+    TargetFeatures.push_back(ArchFeature);
+  }
+
   // get default FPU features
   unsigned FPUKind = llvm::ARM::getDefaultFPU(CPU, Arch);
   llvm::ARM::getFPUFeatures(FPUKind, TargetFeatures);
Index: cfe/trunk/test/CodeGen/arm-long-calls.c
===================================================================
--- cfe/trunk/test/CodeGen/arm-long-calls.c
+++ cfe/trunk/test/CodeGen/arm-long-calls.c
@@ -1,7 +1,7 @@
 // RUN: %clang_cc1 -triple thumbv7-apple-ios5  -target-feature +long-calls -emit-llvm -o - %s | FileCheck -check-prefix=LONGCALL %s
 // RUN: %clang_cc1 -triple thumbv7-apple-ios5 -emit-llvm -o - %s | FileCheck -check-prefix=NOLONGCALL %s
 
-// LONGCALL: attributes #0 = { {{.*}} "target-features"="+long-calls,+thumb-mode"
-// NOLONGCALL-NOT: attributes #0 = { {{.*}} "target-features"="+long-calls,+thumb-mode"
+// LONGCALL: attributes #0 = { {{.*}} "target-features"="+armv7-a,+long-calls,+thumb-mode"
+// NOLONGCALL-NOT: attributes #0 = { {{.*}} "target-features"="+armv7-a,+long-calls,+thumb-mode"
 
 int foo1(int a) { return a; }
Index: cfe/trunk/test/CodeGen/arm-no-movt.c
===================================================================
--- cfe/trunk/test/CodeGen/arm-no-movt.c
+++ cfe/trunk/test/CodeGen/arm-no-movt.c
@@ -1,7 +1,7 @@
 // RUN: %clang_cc1 -triple thumbv7-apple-ios5  -target-feature +no-movt -emit-llvm -o - %s | FileCheck -check-prefix=NO-MOVT %s
 // RUN: %clang_cc1 -triple thumbv7-apple-ios5 -emit-llvm -o - %s | FileCheck -check-prefix=MOVT %s
 
-// NO-MOVT: attributes #0 = { {{.*}} "target-features"="+no-movt,+thumb-mode"
-// MOVT-NOT: attributes #0 = { {{.*}} "target-features"="+no-movt,+thumb-mode"
+// NO-MOVT: attributes #0 = { {{.*}} "target-features"="+armv7-a,+no-movt,+thumb-mode"
+// MOVT-NOT: attributes #0 = { {{.*}} "target-features"="+armv7-a,+no-movt,+thumb-mode"
 
 int foo1(int a) { return a; }
Index: cfe/trunk/test/CodeGen/arm-target-features.c
===================================================================
--- cfe/trunk/test/CodeGen/arm-target-features.c
+++ cfe/trunk/test/CodeGen/arm-target-features.c
@@ -1,22 +1,23 @@
 // REQUIRES: arm-registered-target
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabihf -target-cpu cortex-a8 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP3
-// CHECK-VFP3: "target-features"="+dsp,+neon,+thumb-mode
+// CHECK-VFP3: "target-features"="+armv7-a,+dsp,+neon,+thumb-mode,+vfp3"
 
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabihf -target-cpu cortex-a5 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4
-// CHECK-VFP4: "target-features"="+dsp,+neon,+thumb-mode,+vfp4"
+// CHECK-VFP4: "target-features"="+armv7-a,+dsp,+neon,+thumb-mode,+vfp4"
 
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabihf -target-cpu cortex-a7 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-a12 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV
-// RUN: %clang_cc1 -triple thumbv7s-linux-gnueabi -target-cpu swift -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV
+// RUN: %clang_cc1 -triple thumbv7s-linux-gnueabi -target-cpu swift -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV-2
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabihf -target-cpu krait -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV
-// CHECK-VFP4-DIV: "target-features"="+dsp,+hwdiv,+hwdiv-arm,+neon,+thumb-mode,+vfp4"
+// CHECK-VFP4-DIV: "target-features"="+armv7-a,+dsp,+hwdiv,+hwdiv-arm,+neon,+thumb-mode,+vfp4"
+// CHECK-VFP4-DIV-2: "target-features"="+armv7s,+dsp,+hwdiv,+hwdiv-arm,+neon,+thumb-mode,+vfp4"
 
 // RUN: %clang_cc1 -triple armv7-linux-gnueabihf -target-cpu cortex-a15 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV-ARM
 // RUN: %clang_cc1 -triple armv7-linux-gnueabihf -target-cpu cortex-a17 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-DIV-ARM
-// CHECK-VFP4-DIV-ARM: "target-features"="+dsp,+hwdiv,+hwdiv-arm,+neon,+vfp4,-thumb-mode"
+// CHECK-VFP4-DIV-ARM: "target-features"="+armv7-a,+dsp,+hwdiv,+hwdiv-arm,+neon,+vfp4,-thumb-mode"
 
 // RUN: %clang_cc1 -triple thumbv7s-apple-ios7.0 -target-cpu cyclone -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8
 // RUN: %clang_cc1 -triple thumbv8-linux-gnueabihf -target-cpu cortex-a32 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8
@@ -27,37 +28,81 @@
 // RUN: %clang_cc1 -triple thumbv8-linux-gnueabihf -target-cpu exynos-m1 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8
 // RUN: %clang_cc1 -triple thumbv8-linux-gnueabihf -target-cpu exynos-m2 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8
 // RUN: %clang_cc1 -triple thumbv8-linux-gnueabihf -target-cpu exynos-m3 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8
-// CHECK-BASIC-V8: "target-features"="+crc,+crypto,+dsp,+fp-armv8,+hwdiv,+hwdiv-arm,+neon,+thumb-mode"
+// CHECK-BASIC-V8: "target-features"="+armv8-a,+crc,+crypto,+dsp,+fp-armv8,+hwdiv,+hwdiv-arm,+neon,+thumb-mode"
 
 // RUN: %clang_cc1 -triple armv8-linux-gnueabi -target-cpu cortex-a53 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-BASIC-V8-ARM
-// CHECK-BASIC-V8-ARM: "target-features"="+crc,+crypto,+dsp,+fp-armv8,+hwdiv,+hwdiv-arm,+neon,-thumb-mode"
+// CHECK-BASIC-V8-ARM: "target-features"="+armv8-a,+crc,+crypto,+dsp,+fp-armv8,+hwdiv,+hwdiv-arm,+neon,-thumb-mode"
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-r5 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP3-D16-DIV
-// CHECK-VFP3-D16-DIV: "target-features"="+d16,+dsp,+hwdiv,+hwdiv-arm,+thumb-mode,+vfp3"
+// CHECK-VFP3-D16-DIV: "target-features"="+armv7-r,+d16,+dsp,+hwdiv,+hwdiv-arm,+thumb-mode,+vfp3"
 
 
 // RUN: %clang_cc1 -triple armv7-linux-gnueabi -target-cpu cortex-r4f -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP3-D16-THUMB-DIV
-// CHECK-VFP3-D16-THUMB-DIV: "target-features"="+d16,+dsp,+hwdiv,+vfp3,-thumb-mode"
+// CHECK-VFP3-D16-THUMB-DIV: "target-features"="+armv7-r,+d16,+dsp,+hwdiv,+vfp3,-thumb-mode"
 
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-r7 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP3-D16-FP16-DIV
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-r8 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP3-D16-FP16-DIV
-// CHECK-VFP3-D16-FP16-DIV: "target-features"="+d16,+dsp,+fp16,+hwdiv,+hwdiv-arm,+thumb-mode,+vfp3"
+// CHECK-VFP3-D16-FP16-DIV: "target-features"="+armv7-r,+d16,+dsp,+fp16,+hwdiv,+hwdiv-arm,+thumb-mode,+vfp3"
 
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-m4 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP4-D16-SP-THUMB-DIV
-// CHECK-VFP4-D16-SP-THUMB-DIV: "target-features"="+d16,+dsp,+fp-only-sp,+hwdiv,+thumb-mode,+vfp4"
+// CHECK-VFP4-D16-SP-THUMB-DIV: "target-features"="+armv7e-m,+d16,+dsp,+fp-only-sp,+hwdiv,+thumb-mode,+vfp4"
 
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-m7 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-VFP5-D16-THUMB-DIV
-// CHECK-VFP5-D16-THUMB-DIV: "target-features"="+d16,+dsp,+fp-armv8,+hwdiv,+thumb-mode"
+// CHECK-VFP5-D16-THUMB-DIV: "target-features"="+armv7e-m,+d16,+dsp,+fp-armv8,+hwdiv,+thumb-mode"
 
 
 // RUN: %clang_cc1 -triple armv7-linux-gnueabi -target-cpu cortex-r4 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-DIV
-// CHECK-THUMB-DIV: "target-features"="+dsp,+hwdiv,-thumb-mode"
+// CHECK-THUMB-DIV: "target-features"="+armv7-r,+dsp,+hwdiv,-thumb-mode"
 
 // RUN: %clang_cc1 -triple thumbv7-linux-gnueabi -target-cpu cortex-m3 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-THUMB-DIV-M3
-// CHECK-THUMB-DIV-M3: "target-features"="+hwdiv,+thumb-mode"
+// CHECK-THUMB-DIV-M3: "target-features"="+armv7-m,+hwdiv,+thumb-mode"
 
+// (The following test with no arch specified shouldn't happen; the driver
+// rewrites triples.  Just make sure it does something sane.)
+// RUN: %clang_cc1 -triple arm-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARM-NOARCH-LINUX
+// CHECK-ARM-NOARCH-LINUX: "target-features"="-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv4-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV4-LINUX
+// CHECK-ARMV4-LINUX: "target-features"="+armv4,-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv4t-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV4T-LINUX
+// CHECK-ARMV4T-LINUX: "target-features"="+armv4t,-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv5t-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV5T-LINUX
+// CHECK-ARMV5T-LINUX: "target-features"="+armv5t,-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv6-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6-LINUX
+// CHECK-ARMV6-LINUX: "target-features"="+armv6,-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv6k-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6K-LINUX
+// CHECK-ARMV6K-LINUX: "target-features"="+armv6k,-thumb-mode"
+
+// RUN: %clang_cc1 -triple arm-linux-gnueabi -target-cpu mpcorenovfp -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6K-MPCORE-LINUX
+// CHECK-ARMV6K-MPCORE-LINUX: "target-features"="+armv6k,+dsp,-thumb-mode"
+
+// RUN: %clang_cc1 -triple armv6t2-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6T2-LINUX
+// CHECK-ARMV6T2-LINUX: "target-features"="+armv6t2,-thumb-mode"
+
+// RUN: %clang_cc1 -triple thumbv6m-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6M-LINUX
+// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m0 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV6M-LINUX 
+// CHECK-ARMV6M-LINUX: "target-features"="+armv6-m,+thumb-mode"
+
+// RUN: %clang_cc1 -triple thumbv7m-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV7M-LINUX
+// CHECK-ARMV7M-LINUX: "target-features"="+armv7-m,+thumb-mode"
+
+// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m3 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV7M-M3-LINUX 
+// CHECK-ARMV7M-M3-LINUX: "target-features"="+armv7-m,+hwdiv,+thumb-mode"
+
+// RUN: %clang_cc1 -triple thumbv8m.base-linux-gnueabi -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV8M-LINUX
+// CHECK-ARMV8M-LINUX: "target-features"="+armv8-m.base,+thumb-mode"
+
+// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m23 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV8M-M23-LINUX 
+// CHECK-ARMV8M-M23-LINUX: "target-features"="+armv8-m.base,+hwdiv,+thumb-mode"
+
+// RUN: %clang_cc1 -triple thumb-linux-gnueabi -target-cpu cortex-m33 -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-ARMV8M-MAIN-LINUX 
+// CHECK-ARMV8M-MAIN-LINUX: "target-features"="+armv8-m.main,+d16,+dsp,+fp-armv8,+fp-only-sp,+hwdiv,+thumb-mode"
 
 void foo() {}
Index: cfe/trunk/test/CodeGen/arm-thumb-mode-target-feature.c
===================================================================
--- cfe/trunk/test/CodeGen/arm-thumb-mode-target-feature.c
+++ cfe/trunk/test/CodeGen/arm-thumb-mode-target-feature.c
@@ -17,8 +17,8 @@
 // THUMB: void @t1() [[ThumbAttr:#[0-7]]]
 // THUMB: void @t2() [[NoThumbAttr:#[0-7]]]
 // THUMB: void @t3() [[ThumbAttr:#[0-7]]]
-// THUMB: attributes [[ThumbAttr]] = { {{.*}} "target-features"="+thumb-mode"
-// THUMB: attributes [[NoThumbAttr]] = { {{.*}} "target-features"="-thumb-mode"
+// THUMB: attributes [[ThumbAttr]] = { {{.*}} "target-features"="+armv7-a,+thumb-mode"
+// THUMB: attributes [[NoThumbAttr]] = { {{.*}} "target-features"="+armv7-a,-thumb-mode"
 //
 // THUMB-CLANG: void @t1() [[ThumbAttr:#[0-7]]]
 // THUMB-CLANG: void @t2() [[NoThumbAttr:#[0-7]]]
@@ -29,5 +29,5 @@
 // ARM: void @t1() [[NoThumbAtr:#[0-7]]]
 // ARM: void @t2() [[NoThumbAttr:#[0-7]]]
 // ARM: void @t3() [[ThumbAttr:#[0-7]]]
-// ARM: attributes [[NoThumbAttr]] = { {{.*}} "target-features"="-thumb-mode"
-// ARM: attributes [[ThumbAttr]] = { {{.*}} "target-features"="+thumb-mode"
+// ARM: attributes [[NoThumbAttr]] = { {{.*}} "target-features"="+armv7-a,-thumb-mode"
+// ARM: attributes [[ThumbAttr]] = { {{.*}} "target-features"="+armv7-a,+thumb-mode"