[X86] Support APXF to enable __builtin_cpu_supports. (#80636)

For referring, APX's spec:
https://cdrdv2.intel.com/v1/dl/getContent/784266
APX's index in libgcc:
https://github.com/gcc-mirror/gcc/blob/master/gcc/common/config/i386/i386-cpuinfo.h#L267

Author: FreddyLeaf

clang/lib/Headers/cpuid.h

@@ -219,6 +219,7 @@
 #define bit_PREFETCHI     0x00004000
 #define bit_USERMSR       0x00008000
 #define bit_AVX10         0x00080000
+#define bit_APXF          0x00200000
 
 /* Features in %eax for leaf 13 sub-leaf 1 */
 #define bit_XSAVEOPT    0x00000001

clang/test/CodeGen/target-builtin-noerror.c

@@ -141,6 +141,7 @@ void verifyfeaturestrings(void) {
   (void)__builtin_cpu_supports("sm3");
   (void)__builtin_cpu_supports("sha512");
   (void)__builtin_cpu_supports("sm4");
+  (void)__builtin_cpu_supports("apxf");
   (void)__builtin_cpu_supports("usermsr");
   (void)__builtin_cpu_supports("avx10.1-256");
   (void)__builtin_cpu_supports("avx10.1-512");

compiler-rt/lib/builtins/cpu_model/x86.c

@@ -217,8 +217,8 @@ enum ProcessorFeatures {
   FEATURE_SM3,
   FEATURE_SHA512,
   FEATURE_SM4,
-  // FEATURE_APXF,
-  FEATURE_USERMSR = 112,
+  FEATURE_APXF,
+  FEATURE_USERMSR,
   FEATURE_AVX10_1_256,
   FEATURE_AVX10_1_512,
   CPU_FEATURE_MAX
@@ -983,6 +983,8 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
     setFeature(FEATURE_USERMSR);
   if (HasLeaf7Subleaf1 && ((EDX >> 19) & 1))
     setFeature(FEATURE_AVX10_1_256);
+  if (HasLeaf7Subleaf1 && ((EDX >> 21) & 1))
+    setFeature(FEATURE_APXF);
 
   unsigned MaxLevel;
   getX86CpuIDAndInfo(0, &MaxLevel, &EBX, &ECX, &EDX);

llvm/include/llvm/TargetParser/X86TargetParser.def

@@ -265,6 +265,7 @@ X86_MICROARCH_LEVEL(X86_64_BASELINE,"x86-64",               95)
 X86_MICROARCH_LEVEL(X86_64_V2,      "x86-64-v2",            96)
 X86_MICROARCH_LEVEL(X86_64_V3,      "x86-64-v3",            97)
 X86_MICROARCH_LEVEL(X86_64_V4,      "x86-64-v4",            98)
+X86_MICROARCH_LEVEL(APXF,           "apxf",                111)
 #undef X86_FEATURE_COMPAT
 #undef X86_FEATURE
 #undef X86_MICROARCH_LEVEL

llvm/lib/TargetParser/Host.cpp

@@ -1846,6 +1846,13 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
   Features["prefetchi"]  = HasLeaf7Subleaf1 && ((EDX >> 14) & 1);
   Features["usermsr"]  = HasLeaf7Subleaf1 && ((EDX >> 15) & 1);
   Features["avx10.1-256"] = HasLeaf7Subleaf1 && ((EDX >> 19) & 1);
+  bool HasAPXF = HasLeaf7Subleaf1 && ((EDX >> 21) & 1);
+  Features["egpr"] = HasAPXF;
+  Features["push2pop2"] = HasAPXF;
+  Features["ppx"] = HasAPXF;
+  Features["ndd"] = HasAPXF;
+  Features["ccmp"] = HasAPXF;
+  Features["cf"] = HasAPXF;
 
   bool HasLeafD = MaxLevel >= 0xd &&
                   !getX86CpuIDAndInfoEx(0xd, 0x1, &EAX, &EBX, &ECX, &EDX);