ARM: Add command line option to select big or little endian

[cpirker]

Summary

Hi All,

I added -EL to select little endian and -EB to select big endian ARM targets.
I also added -mlittle-endian as alias for -EL and -mbig-endian as alias for -EB.

Little endian (as e.g. for armv7):
--target=armv7
--target=armv7 -EL
--target=armv7 -mlittle-endian
--target=armebv7 -EL
--target=armebv7 -mlittle-endian

Big endian (as e.g. for armv7):
--target=armebv7
--target=armv7 -EB
--target=armv7 -mbig-endian
--target=armebv7 -EB
--target=armebv7 -mbig-endian

This patch is similar to D3215 for AArch64.
For the ARM target, I implemented the functionality in ToolChain::ComputeLLVMTriple, similar to the -mthumb option.
For the AArch64 target, I implemented the functionality in computeTargetTriple, similar to the MIPS implementation.

Please review.

Thanks,
Christian

[cpirker]

Hi,

I inverted the aliasing, and removed the -EL/-EB tests.
I made the same in D3215.

Thanks,
Christian

[atanasyan]

LGTM

[cpirker]

I committed this patch as r205967.

[cpirker]

Hi Simon,

I added you as reviewer.
Can you please "Accepted Revision" so that I can "Close Revision"?
As you can see in the comment above, the patch is already committed (rL205967).

Thanks,
Christian

include/clang/Driver/Options.td

 def l : JoinedOrSeparate<["-"], "l">, Flags<[LinkerInput, RenderJoined]>;
 def lazy__framework : Separate<["-"], "lazy_framework">, Flags<[LinkerInput]>;
 def lazy__library : Separate<["-"], "lazy_library">, Flags<[LinkerInput]>;
-def EL : Flag<["-"], "EL">, Flags<[DriverOption]>;
-def EB : Flag<["-"], "EB">, Flags<[DriverOption]>;
+def mlittle_endian : Flag<["-"], "mlittle-endian">, Flags<[DriverOption]>;
+def EL : Flag<["-"], "EL">, Alias<mlittle_endian>;
+def mbig_endian : Flag<["-"], "mbig-endian">, Flags<[DriverOption]>;
+def EB : Flag<["-"], "EB">, Alias<mbig_endian>;
 def m16 : Flag<["-"], "m16">, Group<m_Group>, Flags<[DriverOption, CoreOption]>;
 def m32 : Flag<["-"], "m32">, Group<m_Group>, Flags<[DriverOption, CoreOption]>;
 def mqdsp6_compat : Flag<["-"], "mqdsp6-compat">, Group<m_Group>, Flags<[DriverOption,CC1Option]>,

lib/Driver/ToolChain.cpp

     bool IsBigEndian = getTriple().getArch() == llvm::Triple::armeb ||
                        getTriple().getArch() == llvm::Triple::thumbeb;
 
+    // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
+    // '-mbig-endian'/'-EB'.
+    if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
+                                 options::OPT_mbig_endian)) {
+      if (A->getOption().matches(options::OPT_mlittle_endian))
+        IsBigEndian = false;
+      else
+        IsBigEndian = true;
+    }
+
     // Thumb2 is the default for V7 on Darwin.
     //
     // FIXME: Thumb should just be another -target-feaure, not in the triple.

test/Driver/arm-cortex-cpus.c

 // 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 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
+// RUN: %clang -target arm -march=armv8-a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target armv8 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -march=armv8 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target armv8a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -march=armv8a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
+// RUN: %clang -target arm -mlittle-endian -march=armv8-a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A %s
 // CHECK-V8A: "-cc1"{{.*}} "-triple" "armv8-{{.*}}" "-target-cpu" "cortex-a53"
 
-// RUN: %clang -target armebv8  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target armebv8 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
 // RUN: %clang -target armeb -march=armebv8 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
 // RUN: %clang -target armebv8a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
 // RUN: %clang -target armeb -march=armebv8a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
-// RUN: %clang -target armeb -march=armebv8-a  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target armeb -march=armebv8-a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target armv8 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target arm -march=armebv8 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target armv8a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target arm -march=armebv8a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
+// RUN: %clang -target arm -march=armebv8-a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A %s
 // CHECK-BE-V8A: "-cc1"{{.*}} "-triple" "armebv8-{{.*}}" "-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
+// RUN: %clang -target armv8 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target arm -march=armv8 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target armv8a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
+// RUN: %clang -target arm -march=armv8a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V8A-THUMB %s
 // CHECK-V8A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8-{{.*}}" "-target-cpu" "cortex-a53"
 
 // RUN: %clang -target armebv8 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
 // RUN: %clang -target armeb -march=armebv8 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
 // RUN: %clang -target armebv8a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
 // RUN: %clang -target armeb -march=armebv8a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
+// RUN: %clang -target armv8 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
+// RUN: %clang -target arm -march=armebv8 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
+// RUN: %clang -target armv8a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
+// RUN: %clang -target arm -march=armebv8a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V8A-THUMB %s
 // CHECK-BE-V8A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv8-{{.*}}" "-target-cpu" "cortex-a53"
 
 // ================== Check default Architecture on each Cortex CPU

 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a8 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A %s
 // CHECK-CPUV7A: "-cc1"{{.*}} "-triple" "armv7-{{.*}}
 
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s

 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a9 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a12 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a15 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a8 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A %s
 // CHECK-BE-CPUV7A: "-cc1"{{.*}} "-triple" "armebv7-{{.*}}
 
-// 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
+// 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
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a8 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7A-THUMB %s
 // CHECK-CPUV7A-THUMB: "-cc1"{{.*}} "-triple" "thumbv7-{{.*}}
 
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a5  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a7  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a8  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a9  -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a12 -mthumb  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
-// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a15 -mthumb  -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a7 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a8 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a9 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a12 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-a15 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a5 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a7 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a8 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a9 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a12 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-a15 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7A-THUMB %s
 // CHECK-BE-CPUV7A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv7-{{.*}}
 
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m0 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV6M %s
 // CHECK-CPUV6M: "-cc1"{{.*}} "-triple" "thumbv6m-{{.*}}
 
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m3 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7M %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m3 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7M %s
 // CHECK-CPUV7M: "-cc1"{{.*}} "-triple" "thumbv7m-{{.*}}
 
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-m3 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7M %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m3 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7M %s
 // CHECK-BE-CPUV7M: "-cc1"{{.*}} "-triple" "thumbebv7m-{{.*}}
 
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m4 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7EM %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m4 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7EM %s
 // CHECK-CPUV7EM: "-cc1"{{.*}} "-triple" "thumbv7em-{{.*}}
 
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-m4 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7EM %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-m4 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7EM %s
 // CHECK-BE-CPUV7EM: "-cc1"{{.*}} "-triple" "thumbebv7em-{{.*}}
 
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R %s
 // RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R %s
 // CHECK-CPUV7R: "-cc1"{{.*}} "-triple" "armv7r-{{.*}}
 
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-r4 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R %s
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-r5 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R %s
 // CHECK-BE-CPUV7R: "-cc1"{{.*}} "-triple" "armebv7r-{{.*}}
 
 // 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
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV7R-THUMB %s
 // CHECK-CPUV7R-THUMB: "-cc1"{{.*}} "-triple" "thumbv7r-{{.*}}
 
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-r4 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R-THUMB %s
 // RUN: %clang -target armeb-linux-gnueabi -mcpu=cortex-r5 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r4 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R-THUMB %s
+// RUN: %clang -target arm-linux-gnueabi -mcpu=cortex-r5 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV7R-THUMB %s
 // CHECK-BE-CPUV7R-THUMB: "-cc1"{{.*}} "-triple" "thumbebv7r-{{.*}}
 
 // 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
+// RUN: %clang -target arm -mcpu=cortex-a53 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A %s
+// RUN: %clang -target arm -mcpu=cortex-a57 -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A %s
 // CHECK-CPUV8A: "-cc1"{{.*}} "-triple" "armv8-{{.*}}
 
 // RUN: %clang -target armeb -mcpu=cortex-a53 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A %s
 // RUN: %clang -target armeb -mcpu=cortex-a57 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A %s
+// RUN: %clang -target arm -mcpu=cortex-a53 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A %s
+// RUN: %clang -target arm -mcpu=cortex-a57 -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A %s
 // CHECK-BE-CPUV8A: "-cc1"{{.*}} "-triple" "armebv8-{{.*}}
 
 // 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
+// RUN: %clang -target arm -mcpu=cortex-a53 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
+// RUN: %clang -target arm -mcpu=cortex-a57 -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-CPUV8A-THUMB %s
 // CHECK-CPUV8A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8-{{.*}}
 
 // RUN: %clang -target armeb -mcpu=cortex-a53 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A-THUMB %s
 // RUN: %clang -target armeb -mcpu=cortex-a57 -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A-THUMB %s
+// RUN: %clang -target arm -mcpu=cortex-a53 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A-THUMB %s
+// RUN: %clang -target arm -mcpu=cortex-a57 -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-CPUV8A-THUMB %s
 // CHECK-BE-CPUV8A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv8-{{.*}}