New bswap testcase.

2019-12-08  Andrew Pinski  <apinski@marvell.com>

        * gcc.c-torture/execute/bswap-3.c: New test.

From-SVN: r279100

gcc/testsuite/ChangeLog

+2019-12-08  Andrew Pinski  <apinski@marvell.com>
+
+	* gcc.c-torture/execute/bswap-3.c: New test.
+
 2019-12-08  Sandra Loosemore  <sandra@codesourcery.com>
 
 	Revert:

gcc/testsuite/gcc.c-torture/execute/bswap-3.c

+/* { dg-require-effective-target int32plus } */
+
+int f(unsigned int a) __attribute__((noipa));
+int f(unsigned int a)
+{
+  return ((__builtin_bswap32(a))>>24) & 0x3;
+}
+
+
+int g(unsigned int a) __attribute__((noipa));
+int g(unsigned int a)
+{
+  return a&0x3;
+}
+
+int main(void)
+{
+  for (int b = 0; b <= 0xF; b++)
+    {
+      if (f(b) != g(b))
+	__builtin_abort ();
+    }
+  return 0;
+}
+