Add/fix some FP16 tests

[bogden]

Summary

Adds some missing tests for the FP16 extension, fixes an existing test that misnames it.

[SjoerdMeijer]

LGTM

unittests/Support/TargetParserTest.cpp

TEST(TargetParserTest, testARMExtension) {
   EXPECT_FALSE(testARMExtension("cortex-a8",
                                 ARM::ArchKind::INVALID, "crypto"));
   EXPECT_FALSE(testARMExtension("cortex-r4",
                                 ARM::ArchKind::INVALID, "crypto"));
   EXPECT_FALSE(testARMExtension("cortex-m3",
                                 ARM::ArchKind::INVALID, "crypto"));
   EXPECT_FALSE(testARMExtension("cortex-a53",
                                 ARM::ArchKind::INVALID, "ras"));
+  EXPECT_FALSE(testARMExtension("cortex-a53",
+                                ARM::ArchKind::INVALID, "fp16"));
+  EXPECT_TRUE(testARMExtension("cortex-a55",
+                                ARM::ArchKind::INVALID, "fp16"));
+  EXPECT_TRUE(testARMExtension("cortex-a75",
+                                ARM::ArchKind::INVALID, "fp16"));
   EXPECT_FALSE(testARMExtension("cortex-r52",
                                 ARM::ArchKind::INVALID, "ras"));
   EXPECT_FALSE(testARMExtension("iwmmxt", ARM::ArchKind::INVALID, "crc"));
   EXPECT_FALSE(testARMExtension("xscale", ARM::ArchKind::INVALID, "crc"));
   EXPECT_FALSE(testARMExtension("swift", ARM::ArchKind::INVALID, "crc"));
 
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV2, "thumb"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV2A, "thumb"));
TEST(TargetParserTest, testARMExtension) {
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV7A, "crypto"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV7R, "crypto"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV7M, "crypto"));
   EXPECT_FALSE(testARMExtension("generic",
                                 ARM::ArchKind::ARMV7EM, "crypto"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8A, "ras"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8_1A, "ras"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8_2A, "spe"));
+  EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8_2A, "fp16"));
+  EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8_3A, "fp16"));
+  EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8_4A, "fp16"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::ARMV8R, "ras"));
   EXPECT_FALSE(testARMExtension("generic",
                                 ARM::ArchKind::ARMV8MBaseline, "crc"));
   EXPECT_FALSE(testARMExtension("generic",
                                 ARM::ArchKind::ARMV8MMainline, "crc"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::IWMMXT, "crc"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::IWMMXT2, "crc"));
   EXPECT_FALSE(testARMExtension("generic", ARM::ArchKind::XSCALE, "crc"));
else
       EXPECT_NE(ARM::FPURestriction::None, ARM::getFPURestriction(FK));
   }
 }
 
 TEST(TargetParserTest, ARMExtensionFeatures) {
   std::vector<StringRef> Features;
   unsigned Extensions = ARM::AEK_CRC | ARM::AEK_CRYPTO | ARM::AEK_DSP |
                         ARM::AEK_HWDIVARM | ARM::AEK_HWDIVTHUMB | ARM::AEK_MP |
-                        ARM::AEK_SEC | ARM::AEK_VIRT | ARM::AEK_RAS;
+                        ARM::AEK_SEC | ARM::AEK_VIRT | ARM::AEK_RAS | ARM::AEK_FP16;
 
   for (unsigned i = 0; i <= Extensions; i++)
     EXPECT_TRUE(i == 0 ? !ARM::getExtensionFeatures(i, Features)
                        : ARM::getExtensionFeatures(i, Features));
 }
 
 TEST(TargetParserTest, ARMFPUFeatures) {
   std::vector<StringRef> Features;
EXPECT_TRUE(testAArch64Extension("saphira",
                                    AArch64::ArchKind::INVALID, "rdm"));
   EXPECT_TRUE(testAArch64Extension("saphira",
                                    AArch64::ArchKind::INVALID, "ras"));
   EXPECT_TRUE(testAArch64Extension("saphira",
                                    AArch64::ArchKind::INVALID, "rcpc"));
   EXPECT_TRUE(testAArch64Extension("saphira",
                                    AArch64::ArchKind::INVALID, "profile"));
   EXPECT_FALSE(testAArch64Extension("saphira",
-                                    AArch64::ArchKind::INVALID, "fullfp16"));
+                                    AArch64::ArchKind::INVALID, "fp16"));
+  EXPECT_TRUE(testAArch64Extension("cortex-a55",
+                                    AArch64::ArchKind::INVALID, "fp16"));
+  EXPECT_TRUE(testAArch64Extension("cortex-a75",
+                                    AArch64::ArchKind::INVALID, "fp16"));
   EXPECT_FALSE(testAArch64Extension("thunderx2t99",
                                     AArch64::ArchKind::INVALID, "ras"));
   EXPECT_FALSE(testAArch64Extension("thunderx",
                                     AArch64::ArchKind::INVALID, "lse"));
   EXPECT_FALSE(testAArch64Extension("thunderxt81",
                                     AArch64::ArchKind::INVALID, "lse"));
   EXPECT_FALSE(testAArch64Extension("thunderxt83",
                                     AArch64::ArchKind::INVALID, "lse"));
   EXPECT_FALSE(testAArch64Extension("thunderxt88",
                                     AArch64::ArchKind::INVALID, "lse"));
 
   EXPECT_FALSE(testAArch64Extension(
       "generic", AArch64::ArchKind::ARMV8A, "ras"));
   EXPECT_FALSE(testAArch64Extension(
       "generic", AArch64::ArchKind::ARMV8_1A, "ras"));
   EXPECT_FALSE(testAArch64Extension(
       "generic", AArch64::ArchKind::ARMV8_2A, "spe"));
+  EXPECT_FALSE(testAArch64Extension(
+      "generic", AArch64::ArchKind::ARMV8_2A, "fp16"));
+  EXPECT_FALSE(testAArch64Extension(
+      "generic", AArch64::ArchKind::ARMV8_3A, "fp16"));
+  EXPECT_FALSE(testAArch64Extension(
+      "generic", AArch64::ArchKind::ARMV8_4A, "fp16"));
 }
 
 TEST(TargetParserTest, AArch64ExtensionFeatures) {
   std::vector<StringRef> Features;
   unsigned Extensions = AArch64::AEK_CRC | AArch64::AEK_CRYPTO |
                         AArch64::AEK_FP | AArch64::AEK_SIMD |
                         AArch64::AEK_FP16 | AArch64::AEK_PROFILE |
                         AArch64::AEK_RAS | AArch64::AEK_LSE |