Enable targetting v8-R+ Aarch-32 (#486)

Author: eleanor-arm

cmake/multilib.yaml.in

@@ -152,6 +152,12 @@ Mappings:
 - Match: --target=(arm|thumb)v(8|8\.[1-9]|9|9\.[1-9])a-unknown-none-eabihf
   Flags:
   - --target=armv7-unknown-none-eabihf
+- Match: --target=(arm|thumb)v(8|8\.[1-9]|9|9\.[1-9])r-unknown-none-eabi
+  Flags:
+  - --target=armv7r-unknown-none-eabi
+- Match: --target=(arm|thumb)v(8|8\.[1-9]|9|9\.[1-9])r-unknown-none-eabihf
+  Flags:
+  - --target=armv7r-unknown-none-eabihf
 
 # -march extensions
 - Match: -march=thumbv8\.[1-9]m\.main(\+[^\+]+)*\+fp16(\+[^\+]+)*

test/multilib/armv8r.test

@@ -0,0 +1,19 @@
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabi -mfpu=none         | FileCheck %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabi -mfpu=none -marm   | FileCheck %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabi -mfpu=none -mthumb | FileCheck %s
+# CHECK: arm-none-eabi/armv7r_soft_nofp_exn_rtti{{$}}
+# CHECK-EMPTY:
+
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3-d16 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=neon-vfpv3 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3-d16-fp16 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3-fp16 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv4-d16 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv4 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=neon-fp16 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=neon-vfpv4 | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3-d16 -marm | FileCheck --check-prefix=VFPV3 %s
+# RUN: %clang -print-multi-directory --target=armv8r-none-eabihf -mfpu=vfpv3-d16 -mthumb | FileCheck --check-prefix=VFPV3 %s
+# VFPV3: arm-none-eabi/armv7r_hard_vfpv3_d16_exn_rtti{{$}}
+# VFPV3-EMPTY: