diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index da9b2cb09d1e..d0b452ee0370 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -194,22 +194,36 @@ static const char *getARMTargetCPU(const ArgList &Args,
     .Case("armv3m", "arm7m")
     .Case("armv4", "strongarm")
     .Case("armv4t", "arm7tdmi")
+    .Case("thumbv4t", "arm7tdmi")
     .Cases("armv5", "armv5t", "arm10tdmi")
-    .Cases("armv5e", "armv5te", "arm1026ejs")
+    .Cases("thumbv5", "thumbv5t", "arm10tdmi")
+    .Cases("armv5e", "armv5te", "arm1022e")
+    .Cases("thumbv5e", "thumbv5te", "arm1022e")
     .Case("armv5tej", "arm926ej-s")
+    .Case("thumbv5tej", "arm926ej-s")
     .Cases("armv6", "armv6k", "arm1136jf-s")
+    .Cases("thumbv6", "thumbv6k", "arm1136jf-s")
     .Case("armv6j", "arm1136j-s")
+    .Case("thumbv6j", "arm1136j-s")
     .Cases("armv6z", "armv6zk", "arm1176jzf-s")
+    .Cases("thumbv6z", "thumbv6zk", "arm1176jzf-s")
     .Case("armv6t2", "arm1156t2-s")
+    .Case("thumbv6t2", "arm1156t2-s")
     .Cases("armv6m", "armv6-m", "cortex-m0")
+    .Case("thumbv6m", "cortex-m0")
     .Cases("armv7", "armv7a", "armv7-a", "cortex-a8")
+    .Cases("thumbv7", "thumbv7a", "cortex-a8")
     .Cases("armv7l", "armv7-l", "cortex-a8")
     .Cases("armv7f", "armv7-f", "cortex-a9-mp")
     .Cases("armv7s", "armv7-s", "swift")
     .Cases("armv7r", "armv7-r", "cortex-r4")
+    .Case("thumbv7r", "cortex-r4")
     .Cases("armv7m", "armv7-m", "cortex-m3")
+    .Case("thumbv7m", "cortex-m3")
     .Cases("armv7em", "armv7e-m", "cortex-m4")
+    .Case("thumbv7em", "cortex-m4")
     .Cases("armv8", "armv8a", "armv8-a", "cortex-a53")
+    .Cases("thumbv8", "thumbv8a", "cortex-a53")
     .Case("ep9312", "ep9312")
     .Case("iwmmxt", "iwmmxt")
     .Case("xscale", "xscale")
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 7870f424eb46..2295e930fdff 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -522,21 +522,35 @@ static std::string getARMTargetCPU(const ArgList &Args,
     .Case("armv3m", "arm7m")
     .Case("armv4", "strongarm")
     .Case("armv4t", "arm7tdmi")
+    .Case("thumbv4t", "arm7tdmi")
     .Cases("armv5", "armv5t", "arm10tdmi")
+    .Cases("thumbv5", "thumbv5t", "arm10tdmi")
     .Cases("armv5e", "armv5te", "arm1022e")
+    .Cases("thumbv5e", "thumbv5te", "arm1022e")
     .Case("armv5tej", "arm926ej-s")
+    .Case("thumbv5tej", "arm926ej-s")
     .Cases("armv6", "armv6k", "arm1136jf-s")
+    .Cases("thumbv6", "thumbv6k", "arm1136jf-s")
     .Case("armv6j", "arm1136j-s")
+    .Case("thumbv6j", "arm1136j-s")
     .Cases("armv6z", "armv6zk", "arm1176jzf-s")
+    .Cases("thumbv6z", "thumbv6zk", "arm1176jzf-s")
     .Case("armv6t2", "arm1156t2-s")
+    .Case("thumbv6t2", "arm1156t2-s")
     .Cases("armv6m", "armv6-m", "cortex-m0")
+    .Case("thumbv6m", "cortex-m0")
     .Cases("armv7", "armv7a", "armv7-a", "cortex-a8")
+    .Cases("thumbv7", "thumbv7a", "cortex-a8")
     .Cases("armv7em", "armv7e-m", "cortex-m4")
+    .Case("thumbv7em", "cortex-m4")
     .Cases("armv7f", "armv7-f", "cortex-a9-mp")
     .Cases("armv7s", "armv7-s", "swift")
     .Cases("armv7r", "armv7-r", "cortex-r4")
+    .Case("thumbv7r", "cortex-r4")
     .Cases("armv7m", "armv7-m", "cortex-m3")
+    .Case("thumbv7m", "cortex-m3")
     .Cases("armv8", "armv8a", "armv8-a", "cortex-a53")
+    .Cases("thumbv8", "thumbv8a", "cortex-a53")
     .Case("ep9312", "ep9312")
     .Case("iwmmxt", "iwmmxt")
     .Case("xscale", "xscale")
diff --git a/clang/test/Driver/arm-cortex-cpus.c b/clang/test/Driver/arm-cortex-cpus.c
index bd833cbdd009..55d3ab4848f7 100644
--- a/clang/test/Driver/arm-cortex-cpus.c
+++ b/clang/test/Driver/arm-cortex-cpus.c
@@ -1,5 +1,74 @@
-// ================== Check default Cortex CPU on each major architecture
-// RUN: %clang -target armv6m-apple-darwin -arch armv6m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6M %s
+// ================== Check default CPU on each major architecture
+// RUN: %clang -target armv4t -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V4T %s
+// RUN: %clang -target arm -march=armv4t -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V4T %s
+// CHECK-V4T: "-cc1"{{.*}} "-triple" "armv4t-{{.*}} "-target-cpu" "arm7tdmi"
+
+// RUN: %clang -target armv4t -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V4T-THUMB %s
+// RUN: %clang -target arm -mthumb -march=armv4t -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V4T-THUMB %s
+// CHECK-V4T-THUMB: "-cc1"{{.*}} "-triple" "thumbv4t-{{.*}} "-target-cpu" "arm7tdmi"
+
+// RUN: %clang -target armv5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5 %s
+// RUN: %clang -target arm -march=armv5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5 %s
+// RUN: %clang -target armv5t -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5 %s
+// RUN: %clang -target arm -march=armv5t -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5 %s
+// CHECK-V5: "-cc1"{{.*}} "-triple" "armv5-{{.*}} "-target-cpu" "arm10tdmi"
+
+// RUN: %clang -target armv5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5-THUMB %s
+// RUN: %clang -target armv -march=armv5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5-THUMB %s
+// RUN: %clang -target armv5t -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5-THUMB %s
+// RUN: %clang -target arm -march=armv5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5-THUMB %s
+// CHECK-V5-THUMB: "-cc1"{{.*}} "-triple" "thumbv5-{{.*}} "-target-cpu" "arm10tdmi"
+
+// RUN: %clang -target armv5e -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5E %s
+// RUN: %clang -target arm -march=armv5e -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5E %s
+// CHECK-V5E: "-cc1"{{.*}} "-triple" "armv5e-{{.*}} "-target-cpu" "arm1022e"
+
+// RUN: %clang -target armv5e -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5E-THUMB %s
+// RUN: %clang -target arm -march=armv5e -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5E-THUMB %s
+// CHECK-V5E-THUMB: "-cc1"{{.*}} "-triple" "thumbv5e-{{.*}} "-target-cpu" "arm1022e"
+
+// FIXME %clang -target armv5tej -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5TEJ %s
+// RUN: %clang -target arm -march=armv5tej -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5TEJ %s
+// CHECK-V5TEJ: "-cc1"{{.*}} "-triple" "armv5e-{{.*}} "-target-cpu" "arm926ej-s"
+
+// FIXME %clang -target armv5tej -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5TEJ-THUMB %s
+// RUN: %clang -target arm -march=armv5tej -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V5TEJ-THUMB %s
+// CHECK-V5TEJ-THUMB: "-cc1"{{.*}} "-triple" "thumbv5e-{{.*}} "-target-cpu" "arm926ej-s"
+
+// RUN: %clang -target armv6 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6 %s
+// RUN: %clang -target arm -march=armv6 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6 %s
+// CHECK-V6: "-cc1"{{.*}} "-triple" "armv6-{{.*}} "-target-cpu" "arm1136jf-s"
+
+// RUN: %clang -target armv6 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6-THUMB %s
+// RUN: %clang -target arm -march=armv6 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6-THUMB %s
+// CHECK-V6-THUMB: "-cc1"{{.*}} "-triple" "thumbv6-{{.*}} "-target-cpu" "arm1136jf-s"
+
+// FIXME %clang -target armv6j -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6J %s
+// RUN: %clang -target arm -march=armv6j -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6J %s
+// CHECK-V6J: "-cc1"{{.*}} "-triple" "armv6-{{.*}} "-target-cpu" "arm1136j-s"
+
+// FIXME %clang -target armv6j -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6J-THUMB %s
+// RUN: %clang -target arm -march=armv6j -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6J-THUMB %s
+// CHECK-V6J-THUMB: "-cc1"{{.*}} "-triple" "thumbv6-{{.*}} "-target-cpu" "arm1136j-s"
+
+// FIXME %clang -target armv6z -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6Z %s
+// FIXME %clang -target arm -march=armv6z -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6Z %s
+// CHECK-V6Z: "-cc1"{{.*}} "-triple" "armv6-{{.*}} "-target-cpu" "arm1176jzf-s"
+
+// FIXME %clang -target armv6z -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6Z-THUMB %s
+// FIXME %clang -target arm arch=armv6z -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6Z-THUMB %s
+// CHECK-V6Z-THUMB: "-cc1"{{.*}} "-triple" "thumbv6-{{.*}} "-target-cpu" "arm1176jzfs"
+
+// RUN: %clang -target armv6t2 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6T2 %s
+// RUN: %clang -target arm -march=armv6t2 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6T2 %s
+// CHECK-V6T2: "-cc1"{{.*}} "-triple" "armv6t2-{{.*}} "-target-cpu" "arm1156t2-s"
+
+// RUN: %clang -target armv6t2 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6T2-THUMB %s
+// RUN: %clang -target arm -march=armv6t2 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6T2-THUMB %s
+// CHECK-V6T2-THUMB: "-cc1"{{.*}} "-triple" "thumbv6t2-{{.*}} "-target-cpu" "arm1156t2-s"
+
+// RUN: %clang -target armv6m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6M %s
+// RUN: %clang -target arm -march=armv6m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6M %s
 // CHECK-V6M: "-cc1"{{.*}} "-triple" "thumbv6m-{{.*}} "-target-cpu" "cortex-m0"
 
 // RUN: %clang -target armv7m-apple-darwin -arch armv7m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7M %s
@@ -8,16 +77,44 @@
 // RUN: %clang -target armv7em-apple-darwin -arch armv7em -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7EM %s
 // CHECK-V7EM: "-cc1"{{.*}} "-triple" "thumbv7em-{{.*}} "-target-cpu" "cortex-m4"
 
+// RUN: %clang -target armv6m-apple-darwin -arch armv6m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V6M-DARWIN %s
+// CHECK-V6M-DARWIN: "-cc1"{{.*}} "-triple" "thumbv6m-{{.*}} "-target-cpu" "cortex-m0"
+
+// RUN: %clang -target armv7m-apple-darwin -arch armv7m -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7M-DARWIN %s
+// CHECK-V7M-DARWIN: "-cc1"{{.*}} "-triple" "thumbv7m-{{.*}} "-target-cpu" "cortex-m3"
+
+// RUN: %clang -target armv7em-apple-darwin -arch armv7em -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7EM-DARWIN %s
+// CHECK-V7EM-DARWIN: "-cc1"{{.*}} "-triple" "thumbv7em-{{.*}} "-target-cpu" "cortex-m4"
+
 // RUN: %clang -target armv7a-linux-gnueabi -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7A %s
+// RUN: %clang -target arm-linux-gnueabi -march=armv7-a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7A %s
 // CHECK-V7A: "-cc1"{{.*}} "-triple" "armv7-{{.*}} "-target-cpu" "cortex-a8"
 
+// RUN: %clang -target armv7a-linux-gnueabi -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -march=armv7-a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7A-THUMB %s
+// CHECK-V7A-THUMB: "-cc1"{{.*}} "-triple" "thumbv7-{{.*}} "-target-cpu" "cortex-a8"
+
 // RUN: %clang -target armv7r-linux-gnueabi -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7R %s
+// RUN: %clang -target arm-linux-gnueabi -march=armv7-r -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7R %s
 // CHECK-V7R: "-cc1"{{.*}} "-triple" "armv7r-{{.*}} "-target-cpu" "cortex-r4"
 
+// RUN: %clang -target armv7r-linux-gnueabi -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7R-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -march=armv7-r -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V7R-THUMB %s
+// CHECK-V7R-THUMB: "-cc1"{{.*}} "-triple" "thumbv7r-{{.*}} "-target-cpu" "cortex-r4"
+
 // RUN: %clang -target armv8  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -march=armv8 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
 // RUN: %clang -target armv8a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -march=armv8a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -march=armv8-a  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
 // CHECK-V8A: "-cc1"{{.*}} "-triple" "armv8-{{.*}}" "-target-cpu" "cortex-a53"
 
+// RUN: %clang -target armv8 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target arm -march=armv8 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target armv8a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target arm -march=armv8a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// CHECK-V8A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8-{{.*}}" "-target-cpu" "cortex-a53"
+
 // ================== Check default Architecture on each Cortex CPU
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
@@ -27,6 +124,14 @@
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
 // CHECK-CPUV7A: "-cc1"{{.*}} "-triple" "armv7-{{.*}}
 
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a8  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -mthumb  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -mthumb  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// CHECK-CPUV7A-THUMB: "-cc1"{{.*}} "-triple" "thumbv7-{{.*}}
+
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m0 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV6M %s
 // CHECK-CPUV6M: "-cc1"{{.*}} "-triple" "thumbv6m-{{.*}}
 
@@ -40,6 +145,14 @@
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R %s
 // CHECK-CPUV7R: "-cc1"{{.*}} "-triple" "armv7r-{{.*}}
 
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R-THUMB %s
+// CHECK-CPUV7R-THUMB: "-cc1"{{.*}} "-triple" "thumbv7r-{{.*}}
+
 // RUN: %clang -target arm -mcpu=cortex-a53 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A %s
 // RUN: %clang -target arm -mcpu=cortex-a57 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A %s
 // CHECK-CPUV8A: "-cc1"{{.*}} "-triple" "armv8-{{.*}}
+
+// RUN: %clang -target arm -mcpu=cortex-a53 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
+// RUN: %clang -target arm -mcpu=cortex-a57 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
+// CHECK-CPUV8A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8-{{.*}}