Add check_effective_target_pie

	* gcc.target/i386/pie.c: New test.

	* lib/target-supports.exp (check_effective_target_pie): New.

From-SVN: r219553

gcc/testsuite/ChangeLog

+2015-01-13  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* gcc.target/i386/pie.c: New test.
+
+	* lib/target-supports.exp (check_effective_target_pie): New.
+
 2015-01-13  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/64286

gcc/testsuite/gcc.target/i386/pie.c

+/* { dg-do compile { target pie } } */
+/* { dg-options "-O2" } */
+
+int foo (void);
+
+int
+main (void)
+{
+  return foo ();
+}
+
+/* { dg-final { scan-assembler "foo@PLT" } } */

gcc/testsuite/lib/target-supports.exp

@@ -1080,6 +1080,16 @@ proc check_effective_target_nonpic { } {
     }]
 }
 
+# Return 1 if the current multilib generates PIE by default.
+
+proc check_effective_target_pie { } {
+    return [check_no_compiler_messages pie assembly {
+	#ifndef __PIE__
+	#error unsupported
+	#endif
+    }]
+}
+
 # Return 1 if the target does not use a status wrapper.
 
 proc check_effective_target_unwrapped { } {