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, 60 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr33136-3.c b/gcc/testsuite/gcc.dg/pr33136-3.c
new file mode 100644
index 000000000..fcb5972eb
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr33136-3.c
@@ -0,0 +1,60 @@
+/* PR tree-optimization/33136 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+struct S
+{
+  void *a;
+  int b[3];
+  double *c;
+};
+static double d, e;
+
+static struct S s;
+
+static int *
+__attribute__((noinline, const))
+foo (void)
+{
+  return (int *) &s.b;
+}
+
+double *
+__attribute__((noinline))
+bar (double **f)
+{
+  s.c = &d;
+  *f = &e;
+  /* As nothing ever takes the address of any double * field in struct S,
+     the write to *f can't alias with the s.c field.  */
+  return s.c;
+}
+
+int
+__attribute__((noinline))
+baz (int *x)
+{
+  s.b[0] = 1;
+  *x = 4;
+  /* Function foo takes address of an int array field in struct S,
+     so *x can alias with the s.b field (and it does in this testcase).  */
+  return s.b[0];
+}
+
+int
+__attribute__((noinline))
+t (void)
+{
+  double *f = (double *) 0;
+  return 10 * (bar (&f) != &d) + baz (foo ());
+}
+
+int
+main (void)
+{
+  if (t () != 4)
+    abort ();
+  return 0;
+}