Require alloca for some test-cases

2018-01-08  Tom de Vries  <tom@codesourcery.com>

	* c-c++-common/builtins.c: Require effective target alloca.
	* gcc.dg/Wrestrict.c: Same.
	* gcc.dg/tree-ssa/loop-interchange-15.c: Same.

From-SVN: r256332

gcc/testsuite/ChangeLog

+2018-01-08  Tom de Vries  <tom@codesourcery.com>
+
+	* c-c++-common/builtins.c: Require effective target alloca.
+	* gcc.dg/Wrestrict.c: Same.
+	* gcc.dg/tree-ssa/loop-interchange-15.c: Same.
+
 2018-01-08  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/83580

gcc/testsuite/c-c++-common/builtins.c

@@ -2,7 +2,8 @@
    with no prototype do not cause an ICE.
   { dg-do compile }
   { dg-options "-O2 -Wall -Wextra" }
-  { dg-prune-output "warning" }  */
+  { dg-prune-output "warning" }
+  { dg-require-effective-target alloca }  */
 
 typedef __SIZE_TYPE__ size_t;
 

gcc/testsuite/gcc.dg/Wrestrict.c

 /* Test to verify that VLAs are handled gracefully by -Wrestrict
    { dg-do compile }
-   { dg-options "-O2 -Wrestrict" }  */
+   { dg-options "-O2 -Wrestrict" }
+   { dg-require-effective-target alloca }  */
 
 typedef __SIZE_TYPE__ size_t;
 

gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-15.c

 /* PR tree-optimization/83337 */
 /* { dg-do run { target int32plus } } */
 /* { dg-options "-O2 -floop-interchange" } */
+/* { dg-require-effective-target alloca }  */
 
 /* Copied from graphite/interchange-5.c */