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, 31 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/builtin-object-size-9.c b/gcc/testsuite/gcc.dg/builtin-object-size-9.c
new file mode 100644
index 000000000..f134aaca0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/builtin-object-size-9.c
@@ -0,0 +1,31 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+typedef __SIZE_TYPE__ size_t;
+extern void *malloc (size_t);
+extern void free (void *);
+extern void abort (void);
+
+union U
+{
+  struct S { int a; int b; } s;
+  int t;
+};
+
+struct T
+{
+  int c;
+  char d[1];
+};
+
+int
+main (void)
+{
+  union U *u = malloc (sizeof (struct S) + sizeof (struct T) + 6);
+  struct T *t = (struct T *) (&u->s + 1);
+  if (__builtin_object_size (t->d, 1)
+      != sizeof (struct T) + 6 - __builtin_offsetof (struct T, d))
+    abort ();
+  free (u);
+  return 0;
+}