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, 51 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr40022.c b/gcc/testsuite/gcc.c-torture/execute/pr40022.c
new file mode 100644
index 000000000..1e8f728ab
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr40022.c
@@ -0,0 +1,51 @@
+extern void abort (void);
+
+struct A
+{
+  struct A *a;
+};
+
+struct B
+{
+  struct A *b;
+};
+
+__attribute__((noinline))
+struct A *
+foo (struct A *x)
+{
+  asm volatile ("" : : "g" (x) : "memory");
+  return x;
+}
+
+__attribute__((noinline))
+void
+bar (struct B *w, struct A *x, struct A *y, struct A *z)
+{
+  struct A **c;
+  c = &w->b;
+  *c = foo (x);
+  while (*c)
+    c = &(*c)->a;
+  *c = foo (y);
+  while (*c)
+    c = &(*c)->a;
+  *c = foo (z);
+}
+
+struct B d;
+struct A e, f, g;
+
+int
+main (void)
+{
+  f.a = &g;
+  bar (&d, &e, &f, 0);
+  if (d.b == 0
+      || d.b->a == 0
+      || d.b->a->a == 0
+      || d.b->a->a->a != 0)
+    abort ();
+  return 0;
+}
+