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, 20 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr45819.c b/gcc/testsuite/gcc.dg/pr45819.c
new file mode 100644
index 000000000..4979fd328
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr45819.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized -w" } */
+
+struct ehci_regs {
+    char x;
+    unsigned int port_status[0];
+} __attribute__ ((packed));
+
+struct ehci_hcd {
+    struct ehci_regs *regs;
+};
+
+int ehci_hub_control (struct ehci_hcd *ehci, int wIndex)
+{
+  unsigned int *status_reg = &ehci->regs->port_status[wIndex];
+  return *(volatile unsigned int *)status_reg;
+}
+
+/* { dg-final { scan-tree-dump "={v}" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */