testsuite: fix ASAN errors

The tests failed on my machine as they contain out-of-bounds
access.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx2-psraq-1.c: Use ARRAY_SIZE.
	* gcc.target/i386/m128-check.h: Move it to the top-level
	context.
	* gcc.target/i386/sse2-psraq-1.c: Use ARRAY_SIZE.
	* gcc.target/i386/sse4_2-check.h: Include the header with
	ARRAY_SIZE definition.

gcc/testsuite/gcc.target/i386/avx2-psraq-1.c

@@ -41,7 +41,7 @@ TEST (void)
   V a = (V) { 0xdeadbeefcafebabeULL, 0x123456789abcdef0ULL,
 	      0x173a74be8a95134cULL, 0x817bae35ac0ebf12ULL };
   int i;
-  for (i = 0; tests[i].n; i++)
+  for (i = 0; i < ARRAY_SIZE (tests); i++)
     {
       V c = tests[i].fn (a);
       if (c[0] != a[0] >> tests[i].n || c[1] != a[1] >> tests[i].n

gcc/testsuite/gcc.target/i386/m128-check.h

 #include <stdio.h>
 #include <xmmintrin.h>
 
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(A) (sizeof (A) / sizeof ((A)[0]))
+#endif
+
 #ifdef __SSE2__
 #include <emmintrin.h>
 
@@ -66,10 +70,6 @@ typedef union
   float a[4];
 } union128;
 
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(A) (sizeof (A) / sizeof ((A)[0]))
-#endif
-
 #ifdef DEBUG
 #define PRINTF printf
 #else

gcc/testsuite/gcc.target/i386/sse2-psraq-1.c

@@ -41,7 +41,7 @@ TEST (void)
   V a = (V) { 0xdeadbeefcafebabeULL, 0x123456789abcdef0ULL };
   V b = (V) { 0x173a74be8a95134cULL, 0x817bae35ac0ebf12ULL };
   int i;
-  for (i = 0; tests[i].n; i++)
+  for (i = 0; i < ARRAY_SIZE (tests); i++)
     {
       V c = tests[i].fn (a);
       if (c[0] != a[0] >> tests[i].n || c[1] != a[1] >> tests[i].n)

gcc/testsuite/gcc.target/i386/sse4_2-check.h

 #include <stdio.h>
 #include <stdlib.h>
 
+#include "m128-check.h"
 #include "cpuid.h"
 
 static void sse4_2_test (void);