Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 53 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/pr2480.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/pr2480.c
new file mode 100644
index 000000000..d7f7af4d2
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/pr2480.c
@@ -0,0 +1,53 @@
+/* { dg-do link } */
+/* { dg-options "-O2" } */
+
+/* We have enough cascading at -O2 to cover the missed control-dependence
+   in SCCVN (which considers the link_error calls to clobber the structs).  */
+
+struct example
+{
+  char a;
+  int b;
+  char c;
+} *ex1;
+
+extern void link_error(void);
+
+void
+bar (void)
+{
+  ex1->a = 1;
+  ex1->b = 2;
+  ex1->c = 3;
+
+  if (ex1->a != 1)
+    link_error ();
+  if (ex1->b != 2)
+    link_error ();
+  if (ex1->c != 3)
+    link_error ();
+
+}
+
+void
+foo (struct example *ex2)
+{
+  ex2->a = 1;
+  ex2->b = 2;
+  ex2->c = 3;
+
+  if (ex2->a != 1)
+    link_error ();
+  if (ex2->b != 2)
+    link_error ();
+  if (ex2->c != 3)
+    link_error ();
+
+}
+
+int main (void)
+{
+  bar ();
+  foo (ex1);
+  return 0;
+}