From bc7b2ed1720655b904356aaf06c726ce8d0a95e5 Mon Sep 17 00:00:00 2001
From: xddxd <dsdominykas@gmail.com>
Date: Mon, 26 Sep 2022 17:06:43 +0300
Subject: [PATCH] Quick hack for Zen 4, more Zen 3 detection

---
 lib/Support/Host.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index bc773c59ff2..b96e9c5547c 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -1038,9 +1038,15 @@ getAMDProcessorTypeAndSubtype(unsigned Family, unsigned Model,
     }
     break;
   case 25:
+    if (testFeature(X86::FEATURE_AVX512VBMI2)) {
+      CPU = "icelake-client";
+      *Type = X86::INTEL_COREI7;
+      *Subtype = X86::INTEL_COREI7_ICELAKE_CLIENT;
+      break; // Treat Zen 4 as Ice Lake for AVX512
+    }
     CPU = "znver3";
     *Type = X86::AMDFAM19H;
-    if (Model <= 0x0f) {
+    if (Model <= 0x0f || Model == 0x21) {
       *Subtype = X86::AMDFAM19H_ZNVER3;
       break; // 00h-0Fh: Zen3
     }