obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 113 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-3.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-3.c
new file mode 100644
index 000000000..2e2e808c1
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-3.c
@@ -0,0 +1,113 @@
+/* Test that __builtin_prefetch does no harm.
+
+   Prefetch data using a variety of storage classes and address
+   expressions with volatile variables and pointers.  */
+
+int glob_int_arr[100];
+int glob_int = 4;
+volatile int glob_vol_int_arr[100];
+int * volatile glob_vol_ptr_int = glob_int_arr;
+volatile int *glob_ptr_vol_int = glob_vol_int_arr;
+volatile int * volatile glob_vol_ptr_vol_int = glob_vol_int_arr;
+volatile int glob_vol_int;
+
+static stat_int_arr[100];
+static volatile int stat_vol_int_arr[100];
+static int * volatile stat_vol_ptr_int = stat_int_arr;
+static volatile int *stat_ptr_vol_int = stat_vol_int_arr;
+static volatile int * volatile stat_vol_ptr_vol_int = stat_vol_int_arr;
+static volatile int stat_vol_int;
+
+struct S {
+  int a;
+  short b, c;
+  char d[8];
+  struct S *next;
+};
+
+struct S str;
+volatile struct S vol_str;
+struct S * volatile vol_ptr_str = &str;
+volatile struct S *ptr_vol_str = &vol_str;
+volatile struct S * volatile vol_ptr_vol_str = &vol_str;
+
+/* Prefetch volatile global variables using the address of the variable.  */
+
+void
+simple_vol_global ()
+{
+  __builtin_prefetch (glob_vol_int_arr, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_int, 0, 0);
+  __builtin_prefetch (glob_ptr_vol_int, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
+  __builtin_prefetch (&glob_vol_int, 0, 0);
+}
+
+/* Prefetch volatile static variables using the address of the variable.  */
+
+void
+simple_vol_file ()
+{
+  __builtin_prefetch (stat_vol_int_arr, 0, 0);
+  __builtin_prefetch (stat_vol_ptr_int, 0, 0);
+  __builtin_prefetch (stat_ptr_vol_int, 0, 0);
+  __builtin_prefetch (stat_vol_ptr_vol_int, 0, 0);
+  __builtin_prefetch (&stat_vol_int, 0, 0);
+}
+
+/* Prefetch using address expressions involving volatile global variables.  */
+
+void
+expr_vol_global (void)
+{
+  __builtin_prefetch (&vol_str, 0, 0);
+  __builtin_prefetch (ptr_vol_str, 0, 0);
+  __builtin_prefetch (vol_ptr_str, 0, 0);
+  __builtin_prefetch (vol_ptr_vol_str, 0, 0);
+  __builtin_prefetch (&vol_str.b, 0, 0);
+  __builtin_prefetch (&ptr_vol_str->b, 0, 0);
+  __builtin_prefetch (&vol_ptr_str->b, 0, 0);
+  __builtin_prefetch (&vol_ptr_vol_str->b, 0, 0);
+  __builtin_prefetch (&vol_str.d, 0, 0);
+  __builtin_prefetch (&vol_ptr_str->d, 0, 0);
+  __builtin_prefetch (&ptr_vol_str->d, 0, 0);
+  __builtin_prefetch (&vol_ptr_vol_str->d, 0, 0);
+  __builtin_prefetch (vol_str.next, 0, 0);
+  __builtin_prefetch (vol_ptr_str->next, 0, 0);
+  __builtin_prefetch (ptr_vol_str->next, 0, 0);
+  __builtin_prefetch (vol_ptr_vol_str->next, 0, 0);
+  __builtin_prefetch (vol_str.next->d, 0, 0);
+  __builtin_prefetch (vol_ptr_str->next->d, 0, 0);
+  __builtin_prefetch (ptr_vol_str->next->d, 0, 0);
+  __builtin_prefetch (vol_ptr_vol_str->next->d, 0, 0);
+
+  __builtin_prefetch (&glob_vol_int_arr, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_int, 0, 0);
+  __builtin_prefetch (glob_ptr_vol_int, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
+  __builtin_prefetch (&glob_vol_int_arr[2], 0, 0);
+  __builtin_prefetch (&glob_vol_ptr_int[3], 0, 0);
+  __builtin_prefetch (&glob_ptr_vol_int[3], 0, 0);
+  __builtin_prefetch (&glob_vol_ptr_vol_int[3], 0, 0);
+  __builtin_prefetch (glob_vol_int_arr+3, 0, 0);
+  __builtin_prefetch (glob_vol_int_arr+glob_vol_int, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_int+5, 0, 0);
+  __builtin_prefetch (glob_ptr_vol_int+5, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_vol_int+5, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_int+glob_vol_int, 0, 0);
+  __builtin_prefetch (glob_ptr_vol_int+glob_vol_int, 0, 0);
+  __builtin_prefetch (glob_vol_ptr_vol_int+glob_vol_int, 0, 0);
+}
+
+int
+main ()
+{
+  simple_vol_global ();
+  simple_vol_file ();
+
+  str.next = &str;
+  vol_str.next = &str;
+  expr_vol_global ();
+
+  exit (0);
+}