diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c21e3d83f963..614560469970 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2015-07-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66703
+	* gcc.target/i386/readeflags-1.c (readeflags_test): Declare with
+	__attribute__((noinline, noclone)).  Change "x" to "volatile char"
+	type to prevent possible flag-clobbering zero-extensions.
+
 2015-07-10  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/60842
diff --git a/gcc/testsuite/gcc.target/i386/readeflags-1.c b/gcc/testsuite/gcc.target/i386/readeflags-1.c
index 363a895e7040..d0dd0da45550 100644
--- a/gcc/testsuite/gcc.target/i386/readeflags-1.c
+++ b/gcc/testsuite/gcc.target/i386/readeflags-1.c
@@ -11,10 +11,11 @@ extern void abort (void);
 #define EFLAGS_TYPE unsigned int
 #endif
 
-static EFLAGS_TYPE
+__attribute__((noinline, noclone))
+EFLAGS_TYPE
 readeflags_test (unsigned int a, unsigned int b)
 {
-  unsigned x = (a == b);
+  volatile char x = (a == b);
   return __readeflags ();
 }