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
@@ -516,7 +516,7 @@
     return VendorSignatures::GENUINE_INTEL;
 
   // "Auth enti cAMD"
-  if (EBX == 0x68747541 && ECX == 0x69746e65 && EDX == 0x444d4163)
+  if (EBX == 0x68747541 && ECX == 0x444d4163 && EDX == 0x69746e65)
     return VendorSignatures::AUTHENTIC_AMD;
 
   return VendorSignatures::UNKNOWN;