use __builtin_alloca, drop non-standard alloca.h

Since alloca.h is not ISO C, most of our alloca-using tests seem to
rely on __builtin_alloca instead of including the header and calling
alloca.  This patch extends this practice to some of the exceptions I
found in gcc.target, marking them as requiring a functional alloca
while at that.


for  gcc/testsuite/ChangeLog

	* gcc.target/arc/interrupt-6.c: Use __builtin_alloca, require
	effective target support for alloca, drop include of alloca.h.
	* gcc.target/i386/pr80969-3.c: Likewise.
	* gcc.target/sparc/setjmp-1.c: Likewise.
	* gcc.target/x86_64/abi/ms-sysv/gen.cc: Likewise.
	* gcc.target/x86_64/abi/ms-sysv/ms-sysv.c: Likewise.

From-SVN: r274558

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/testsuite/gcc.target/sparc/setjmp-1.c b/gcc/testsuite/gcc.target/sparc/setjmp-1.c
index d0fecb3..699d7f7 100644
--- a/gcc/testsuite/gcc.target/sparc/setjmp-1.c
+++ b/gcc/testsuite/gcc.target/sparc/setjmp-1.c
@@ -4,9 +4,9 @@
 /* { dg-do run { target *-*-solaris2.* *-*-linux* *-*-*bsd* } } */

 /* { dg-require-effective-target fpic } */

 /* { dg-options "-fPIC" } */

+/* { dg-require-effective-target alloca } */

 

 #include <stdio.h>

-#include <alloca.h>

 #include <setjmp.h>

 #include <string.h>

 #include <stdlib.h>

@@ -26,7 +26,7 @@ int main (void)
 {

   setjmp (jb);

 

-  char *p = alloca (256);

+  char *p = __builtin_alloca (256);

   memset (p, 0, 256);

   sprintf (p, "%d\n", foo);