Support building the repo with clang 20 (#109756)

Author: jkoritzinsky

eng/native/configurecompiler.cmake

@@ -620,6 +620,9 @@ if (CLR_CMAKE_HOST_UNIX)
 
     # clang 18.1 supressions
     add_compile_options(-Wno-switch-default)
+
+    # clang 20 suppressions
+    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-Wno-nontrivial-memaccess>)
   else()
     add_compile_options(-Wno-uninitialized)
     add_compile_options(-Wno-strict-aliasing)

src/coreclr/debug/ee/stdafx.h

@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <algorithm>
 #include <cmath>
+#include <common.h>
 
 #include <windows.h>
 

src/coreclr/vm/common.h

@@ -73,6 +73,10 @@
 
 #include <olectl.h>
 
+#ifdef HOST_AMD64
+#include <xmmintrin.h>
+#endif
+
 using std::max;
 using std::min;