re PR target/66703 ([4.9/5/6] gcc.target/i386/readeflags-1.c aborts on -march=i586 or on -miamcu)

	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.

From-SVN: r225680

gcc/testsuite/ChangeLog

+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

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 ();
 }