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, 77 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr13146.C b/gcc/testsuite/g++.dg/tree-ssa/pr13146.C
new file mode 100644
index 000000000..22baf03d3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tree-ssa/pr13146.C
@@ -0,0 +1,77 @@
+/* { dg-do link } */
+/* { dg-options "-O -fstrict-aliasing" } */
+
+class first
+{
+public:
+  double d;
+  int f1;
+};
+
+class middle : public first
+{
+};
+
+class second : public middle
+{
+public:
+  int f2;
+  short a;
+};
+
+class third
+{
+public:
+  char a;
+  char b;
+};
+
+class multi: public third, public second
+{
+public:
+  short s;
+  /* The following field used to be of type char but that causes
+     class multi to effectively get alias-set zero which we end
+     up not optimizing because of the fix for PR44164.  */
+  int f3;
+};
+
+extern void link_error ();
+
+void
+foo (first *s1, second *s2)
+{
+  s1->f1 = 0;
+  s2->f2 = 0;
+  s1->f1++;
+  s2->f2++;
+  s1->f1++;
+  s2->f2++;
+  if (s1->f1 != 2)
+    link_error ();
+}
+
+void
+bar (first *s1, multi *s3)
+{
+  s1->f1 = 0;
+  s3->f3 = 0;
+  s1->f1++;
+  s3->f3++;
+  s1->f1++;
+  s3->f3++;
+  if (s1->f1 != 2)
+    link_error ();
+}
+
+
+int
+main()
+{
+  first a;
+  second b;
+  multi c;
+  foo (&a, &b);
+  bar (&a, &c);
+  return 0;
+}