[X86] Add AMD Matisse (znver2) model number to getHostCPUName and compiler-rt's getAMDProcessorTypeAndSubtype.

This is the CPUID model used on Ryzen 3000 series (Zen 2/Matisse) CPUs.

Patch by Alex James

Differential Revision: https://reviews.llvm.org/D70279

Author: topperc

compiler-rt/lib/builtins/cpu_model.c

@@ -471,9 +471,9 @@ static void getAMDProcessorTypeAndSubtype(unsigned Family, unsigned Model,
     break; // "btver2"
   case 23:
     *Type = AMDFAM17H;
-    if (Model >= 0x30 && Model <= 0x3f) {
+    if ((Model >= 0x30 && Model <= 0x3f) || Model == 0x71) {
       *Subtype = AMDFAM17H_ZNVER2;
-      break; // "znver2"; 30h-3fh: Zen2
+      break; // "znver2"; 30h-3fh, 71h: Zen2
     }
     if (Model <= 0x0f) {
       *Subtype = AMDFAM17H_ZNVER1;

llvm/lib/Support/Host.cpp

@@ -959,9 +959,9 @@ static void getAMDProcessorTypeAndSubtype(unsigned Family, unsigned Model,
     break; // "btver2"
   case 23:
     *Type = X86::AMDFAM17H;
-    if (Model >= 0x30 && Model <= 0x3f) {
+    if ((Model >= 0x30 && Model <= 0x3f) || Model == 0x71) {
       *Subtype = X86::AMDFAM17H_ZNVER2;
-      break; // "znver2"; 30h-3fh: Zen2
+      break; // "znver2"; 30h-3fh, 71h: Zen2
     }
     if (Model <= 0x0f) {
       *Subtype = X86::AMDFAM17H_ZNVER1;