AArch64: report fp16 arithmetic is present for apple-a11 CPU.

AArch64.td got it right, but the target-parser dropped it, leading to missing
feature flags in Clang.

Author: TNorthover

clang/test/Preprocessor/aarch64-target-features.c

@@ -231,7 +231,7 @@
 // RUN: %clang -target aarch64 -mcpu=carmel -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-CARMEL %s
 // CHECK-MCPU-APPLE-A7: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crypto" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+sha2" "-target-feature" "+aes"
 // CHECK-MCPU-APPLE-A10: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "+crypto" "-target-feature" "+rdm" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+sha2" "-target-feature" "+aes"
-// CHECK-MCPU-APPLE-A11: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+v8.2a" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "+crypto" "-target-feature" "+ras" "-target-feature" "+lse" "-target-feature" "+rdm" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+sha2" "-target-feature" "+aes"
+// CHECK-MCPU-APPLE-A11: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+v8.2a" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "+crypto" "-target-feature" "+fullfp16" "-target-feature" "+ras" "-target-feature" "+lse" "-target-feature" "+rdm" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+sha2" "-target-feature" "+aes"
 // CHECK-MCPU-APPLE-A12: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+v8.3a" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "+crypto" "-target-feature" "+fullfp16" "-target-feature" "+ras" "-target-feature" "+lse" "-target-feature" "+rdm" "-target-feature" "+rcpc" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+sha2" "-target-feature" "+aes"
 // CHECK-MCPU-A34: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+neon" "-target-feature" "+crc"
 // CHECK-MCPU-APPLE-A13: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+v8.4a" "-target-feature" "+fp-armv8" "-target-feature" "+neon" "-target-feature" "+crc" "-target-feature" "+crypto" "-target-feature" "+dotprod" "-target-feature" "+fullfp16" "-target-feature" "+ras" "-target-feature" "+lse" "-target-feature" "+rdm" "-target-feature" "+rcpc" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+fp16fml" "-target-feature" "+sm4" "-target-feature" "+sha3" "-target-feature" "+sha2" "-target-feature" "+aes"

llvm/include/llvm/Support/AArch64TargetParser.def

@@ -184,7 +184,7 @@ AARCH64_CPU_NAME("apple-a9", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false,
 AARCH64_CPU_NAME("apple-a10", ARMV8A, FK_CRYPTO_NEON_FP_ARMV8, false,
                  (AArch64::AEK_CRC | AArch64::AEK_RDM))
 AARCH64_CPU_NAME("apple-a11", ARMV8_2A, FK_CRYPTO_NEON_FP_ARMV8, false,
-                 (AArch64::AEK_NONE))
+                 (AArch64::AEK_FP16))
 AARCH64_CPU_NAME("apple-a12", ARMV8_3A, FK_CRYPTO_NEON_FP_ARMV8, false,
                  (AArch64::AEK_FP16))
 AARCH64_CPU_NAME("apple-a13", ARMV8_4A, FK_CRYPTO_NEON_FP_ARMV8, false,

llvm/unittests/Support/TargetParserTest.cpp

@@ -1023,10 +1023,10 @@ INSTANTIATE_TEST_CASE_P(
                              AArch64::AEK_SIMD,
                          "8-A"),
         ARMCPUTestParams("apple-a11", "armv8.2-a", "crypto-neon-fp-armv8",
-                         AArch64::AEK_NONE | AArch64::AEK_CRC |
-                             AArch64::AEK_CRYPTO | AArch64::AEK_FP |
-                             AArch64::AEK_LSE | AArch64::AEK_RAS |
-                             AArch64::AEK_RDM | AArch64::AEK_SIMD,
+                         AArch64::AEK_CRC | AArch64::AEK_CRYPTO |
+                             AArch64::AEK_FP | AArch64::AEK_LSE |
+                             AArch64::AEK_RAS | AArch64::AEK_RDM |
+                             AArch64::AEK_SIMD | AArch64::AEK_FP16,
                          "8.2-A"),
         ARMCPUTestParams("apple-a12", "armv8.3-a", "crypto-neon-fp-armv8",
                          AArch64::AEK_CRC | AArch64::AEK_CRYPTO |