diff --git a/compiler-rt/lib/builtins/cpu_model.c b/compiler-rt/lib/builtins/cpu_model.c
--- a/compiler-rt/lib/builtins/cpu_model.c
+++ b/compiler-rt/lib/builtins/cpu_model.c
@@ -422,6 +422,22 @@
       *Subtype = INTEL_COREI7_ICELAKE_CLIENT;
       break;
 
+    // Tigerlake:
+    case 0x8c:
+    case 0x8d:
+      CPU = "tigerlake";
+      *Type = INTEL_COREI7;
+      *Subtype = INTEL_COREI7_TIGERLAKE;
+      break;
+
+    // Alderlake:
+    case 0x97:
+    case 0x9a:
+      CPU = "alderlake";
+      *Type = INTEL_COREI7;
+      *Subtype = INTEL_COREI7_ALDERLAKE;
+      break;
+
     // Icelake Xeon:
     case 0x6a:
     case 0x6c:
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -772,6 +772,22 @@
       *Subtype = X86::INTEL_COREI7_ICELAKE_CLIENT;
       break;
 
+    // Tigerlake:
+    case 0x8c:
+    case 0x8d:
+      CPU = "tigerlake";
+      *Type = X86::INTEL_COREI7;
+      *Subtype = X86::INTEL_COREI7_TIGERLAKE;
+      break;
+
+    // Alderlake:
+    case 0x97:
+    case 0x9a:
+      CPU = "alderlake";
+      *Type = X86::INTEL_COREI7;
+      *Subtype = X86::INTEL_COREI7_ALDERLAKE;
+      break;
+
     // Icelake Xeon:
     case 0x6a:
     case 0x6c: