TargetParser: AArch64: Add part numbers for Apple CPUs.

Part numbers taken from:
https://github.com/AsahiLinux/m1n1/blob/main/src/chickens.c

Reviewers: ahmedbougacha, jroelofs

Reviewed By: jroelofs

Pull Request: #119777

Author: pcc

llvm/lib/TargetParser/Host.cpp

@@ -347,6 +347,29 @@ StringRef sys::detail::getHostCPUNameForARM(StringRef ProcCpuinfoContent) {
     }
   }
 
+  if (Implementer == "0x61") { // Apple
+    return StringSwitch<const char *>(Part)
+        .Case("0x020", "apple-m1")
+        .Case("0x021", "apple-m1")
+        .Case("0x022", "apple-m1")
+        .Case("0x023", "apple-m1")
+        .Case("0x024", "apple-m1")
+        .Case("0x025", "apple-m1")
+        .Case("0x028", "apple-m1")
+        .Case("0x029", "apple-m1")
+        .Case("0x030", "apple-m2")
+        .Case("0x031", "apple-m2")
+        .Case("0x032", "apple-m2")
+        .Case("0x033", "apple-m2")
+        .Case("0x034", "apple-m2")
+        .Case("0x035", "apple-m2")
+        .Case("0x038", "apple-m2")
+        .Case("0x039", "apple-m2")
+        .Case("0x049", "apple-m3")
+        .Case("0x048", "apple-m3")
+        .Default("generic");
+  }
+
   if (Implementer == "0x63") { // Arm China.
     return StringSwitch<const char *>(Part)
         .Case("0x132", "star-mc1")

llvm/unittests/TargetParser/Host.cpp

@@ -143,6 +143,9 @@ TEST(getLinuxHostCPUName, AArch64) {
   EXPECT_EQ(sys::detail::getHostCPUNameForARM("CPU implementer : 0x46\n"
                                               "CPU part        : 0x003"),
             "fujitsu-monaka");
+  EXPECT_EQ(sys::detail::getHostCPUNameForARM("CPU implementer : 0x61\n"
+                                              "CPU part        : 0x039"),
+            "apple-m2");
 
   // MSM8992/4 weirdness
   StringRef MSM8992ProcCpuInfo = R"(