--- a/libavutil/x86/asm.h.orig	2018-04-14 08:34:28.000000000 +0900
+++ b/libavutil/x86/asm.h	2018-06-23 22:34:29.258291000 +0900
@@ -72,7 +72,7 @@
 typedef int x86_reg;
 #endif
 
-#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
+#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE && !defined(__clang__)))
 #define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
 
 #if ARCH_X86_64 && defined(PIC)