[ARM] Add command-line options for ARMv8.2-A

This allows ARMv8.2-A to be targeted either by using "armv8.2a" in the
triple, or by using -march=armv8.2-a (or the alias -march=armv8.2a).

The FP16 extension can be enabled with the "+fp16" suffix to the -march
or -mcpu option. This is consistent with the AArch64 option, rather than
the usual ARM option of -mfpu. We have agreed with the team which will
be upstreaming this to GCC that we want to use this new option format
for new architecture extensions for both ARM and AArch64.

Most of the work for this was done by the TargetParser patch in llvm.

Differential Revision: http://reviews.llvm.org/D15040

llvm-svn: 260533

2 files changed, 53 insertions, 4 deletions

diff --git a/clang/test/Driver/arm-cortex-cpus.c b/clang/test/Driver/arm-cortex-cpus.c
index 6a4d2d631b3..fdacfb8fbe7 100644
--- a/clang/test/Driver/arm-cortex-cpus.c
+++ b/clang/test/Driver/arm-cortex-cpus.c
@@ -204,7 +204,7 @@
 // RUN: %clang -mcpu=generic -target armv8.1a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A %s
 // RUN: %clang -mcpu=generic -target arm -march=armv8.1a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A %s
 // RUN: %clang -mcpu=generic -target arm -mlittle-endian -march=armv8.1-a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A %s
-// CHECK-V81A: "-cc1"{{.*}} "-triple" "armv8.1a-{{.*}}" "-target-cpu" "generic" "-target-feature" "+v8.1a"
+// CHECK-V81A: "-cc1"{{.*}} "-triple" "armv8.1a-{{.*}}" "-target-cpu" "generic"
 
 // RUN: %clang -target armebv8.1a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A %s
 // RUN: %clang -target armeb -march=armebv8.1a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A %s
@@ -212,7 +212,7 @@
 // RUN: %clang -target armv8.1a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A %s
 // RUN: %clang -target arm -march=armebv8.1a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A %s
 // RUN: %clang -target arm -march=armebv8.1-a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A %s
-// CHECK-BE-V81A: "-cc1"{{.*}} "-triple" "armebv8.1a-{{.*}}" "-target-cpu" "generic" "-target-feature" "+v8.1a"
+// CHECK-BE-V81A: "-cc1"{{.*}} "-triple" "armebv8.1a-{{.*}}" "-target-cpu" "generic"
 
 // RUN: %clang -target armv8.1a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A-THUMB %s
 // RUN: %clang -target arm -march=armv8.1a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A-THUMB %s
@@ -220,7 +220,7 @@
 // RUN: %clang -target armv8.1a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A-THUMB %s
 // RUN: %clang -target arm -march=armv8.1a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A-THUMB %s
 // RUN: %clang -target arm -march=armv8.1-a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V81A-THUMB %s
-// CHECK-V81A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8.1a-{{.*}}" "-target-cpu" "generic" "-target-feature" "+v8.1a"
+// CHECK-V81A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8.1a-{{.*}}" "-target-cpu" "generic"
 
 // RUN: %clang -target armebv8.1a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A-THUMB %s
 // RUN: %clang -target armeb -march=armebv8.1a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A-THUMB %s
@@ -228,7 +228,50 @@
 // RUN: %clang -target armv8.1a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A-THUMB %s
 // RUN: %clang -target arm -march=armebv8.1a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A-THUMB %s
 // RUN: %clang -target arm -march=armebv8.1-a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V81A-THUMB %s
-// CHECK-BE-V81A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv8.1a-{{.*}}" "-target-cpu" "generic" "-target-feature" "+v8.1a"
+// CHECK-BE-V81A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv8.1a-{{.*}}" "-target-cpu" "generic"
+
+// RUN: %clang -target armv8.2a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target arm -march=armv8.2a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target arm -march=armv8.2-a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target arm -march=armv8.2a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target armv8.2a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target arm -march=armv8.2a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// RUN: %clang -target arm -mlittle-endian -march=armv8.2-a -mlittle-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A %s
+// CHECK-V82A: "-cc1"{{.*}} "-triple" "armv8.2{{.*}}" "-target-cpu" "generic"
+
+// RUN: %clang -target armebv8.2a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// RUN: %clang -target armv8.2a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// RUN: %clang -target armeb -march=armebv8.2a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// RUN: %clang -target armeb -march=armebv8.2-a -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// RUN: %clang -target arm -march=armebv8.2a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// RUN: %clang -target arm -march=armebv8.2-a -mbig-endian -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A %s
+// CHECK-BE-V82A: "-cc1"{{.*}} "-triple" "armebv8.2{{.*}}" "-target-cpu" "generic"
+
+// RUN: %clang -target armv8.2a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// RUN: %clang -target arm -march=armv8.2a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// RUN: %clang -target arm -march=armv8.2-a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// RUN: %clang -target armv8.2a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// RUN: %clang -target arm -march=armv8.2a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// RUN: %clang -target arm -march=armv8.2-a -mlittle-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-V82A-THUMB %s
+// CHECK-V82A-THUMB: "-cc1"{{.*}} "-triple" "thumbv8.2a-{{.*}}" "-target-cpu" "generic"
+
+// RUN: %clang -target armebv8.2a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// RUN: %clang -target armeb -march=armebv8.2a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// RUN: %clang -target armeb -march=armebv8.2-a -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// RUN: %clang -target armv8.2a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// RUN: %clang -target arm -march=armebv8.2a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// RUN: %clang -target arm -march=armebv8.2-a -mbig-endian -mthumb -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BE-V82A-THUMB %s
+// CHECK-BE-V82A-THUMB: "-cc1"{{.*}} "-triple" "thumbebv8.2a-{{.*}}" "-target-cpu" "generic"
+
+// RUN: %clang -target armv8a -march=armv8.2-a+fp16 -### -c %s 2>&1 | FileCheck --check-prefix CHECK-V82A-FP16 %s
+// CHECK-V82A-FP16: "-cc1"{{.*}} "-triple" "armv8.2{{.*}}" "-target-cpu" "generic" {{.*}}"-target-feature" "+fullfp16"
+
+// Once we have CPUs with optional v8.2-A FP16, we will need a way to turn it
+// on and off. Cortex-A53 is a placeholder for now.
+// RUN: %clang -target armv8a -mcpu=cortex-a53+fp16 -### -c %s 2>&1 | FileCheck --check-prefix CHECK-CORTEX-A53-FP16 %s
+// RUN: %clang -target armv8a -mcpu=cortex-a53+nofp16 -### -c %s 2>&1 | FileCheck --check-prefix CHECK-CORTEX-A53-NOFP16 %s
+// CHECK-CORTEX-A53-FP16: "-cc1" {{.*}}"-target-cpu" "cortex-a53" {{.*}}"-target-feature" "+fullfp16"
+// CHECK-CORTEX-A53-NOFP16: "-cc1" {{.*}}"-target-cpu" "cortex-a53" {{.*}}"-target-feature" "-fullfp16"
 
 // ================== Check that a bogus architecture gives an error
 // RUN: %clang -target arm -march=armbogusv6 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-BOGUS %s
diff --git a/clang/test/Preprocessor/arm-target-features.c b/clang/test/Preprocessor/arm-target-features.c
index ae27aa0a08b..21fedff9bf2 100644
--- a/clang/test/Preprocessor/arm-target-features.c
+++ b/clang/test/Preprocessor/arm-target-features.c
@@ -409,3 +409,9 @@
 // CHECK-V81A: #define __ARM_ARCH_PROFILE 'A'
 // CHECK-V81A: __ARM_FEATURE_QRDMX 1
 // CHECK-V81A: #define __ARM_FP 0xE
+
+// RUN: %clang -target armv8.2a-none-none-eabi -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-V82A %s
+// CHECK-V82A: __ARM_ARCH 8
+// CHECK-V82A: __ARM_ARCH_8_2A__ 1
+// CHECK-V82A: #define __ARM_ARCH_PROFILE 'A'
+// CHECK-V82A: #define __ARM_FP 0xE