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, 69 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c
new file mode 100644
index 000000000..4ee05a94d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c
@@ -0,0 +1,69 @@
+/* Test that __builtin_prefetch does no harm.
+
+   Prefetch using all valid combinations of rw and locality values.
+   These must be compile-time constants.  */
+
+#define NO_TEMPORAL_LOCALITY 0
+#define LOW_TEMPORAL_LOCALITY 1
+#define MODERATE_TEMPORAL_LOCALITY 1
+#define HIGH_TEMPORAL_LOCALITY 3
+
+#define WRITE_ACCESS 1
+#define READ_ACCESS 0
+
+enum locality { none, low, moderate, high };
+enum rw { read, write };
+
+int arr[10];
+
+void
+good_const (const int *p)
+{
+  __builtin_prefetch (p, 0, 0);
+  __builtin_prefetch (p, 0, 1);
+  __builtin_prefetch (p, 0, 2);
+  __builtin_prefetch (p, READ_ACCESS, 3);
+  __builtin_prefetch (p, 1, NO_TEMPORAL_LOCALITY);
+  __builtin_prefetch (p, 1, LOW_TEMPORAL_LOCALITY);
+  __builtin_prefetch (p, 1, MODERATE_TEMPORAL_LOCALITY);
+  __builtin_prefetch (p, WRITE_ACCESS, HIGH_TEMPORAL_LOCALITY);
+}
+
+void
+good_enum (const int *p)
+{
+    __builtin_prefetch (p, read, none);
+    __builtin_prefetch (p, read, low);
+    __builtin_prefetch (p, read, moderate);
+    __builtin_prefetch (p, read, high);
+    __builtin_prefetch (p, write, none);
+    __builtin_prefetch (p, write, low);
+    __builtin_prefetch (p, write, moderate);
+    __builtin_prefetch (p, write, high);
+}
+
+void
+good_expr (const int *p)
+{
+  __builtin_prefetch (p, 1 - 1, 6 - (2 * 3));
+  __builtin_prefetch (p, 1 + 0, 1 + 2);
+}
+
+void
+good_vararg (const int *p)
+{
+  __builtin_prefetch (p, 0, 3);
+  __builtin_prefetch (p, 0);
+  __builtin_prefetch (p, 1);
+  __builtin_prefetch (p);
+}
+
+int
+main ()
+{
+  good_const (arr);
+  good_enum (arr);
+  good_expr (arr);
+  good_vararg (arr);
+  exit (0);
+}