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, 38 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20050719-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20050719-1.c
new file mode 100644
index 000000000..8dc4c7e5b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20050719-1.c
@@ -0,0 +1,38 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void) __attribute__ ((__nothrow__)) __attribute__
+((__noreturn__));
+extern void exit (int __status) __attribute__ ((__nothrow__))
+__attribute__ ((__noreturn__));
+
+struct bootLoader {
+  int x;
+};
+
+void
+zap(struct bootLoader *bootLoader)
+{
+  /* The expression on the RHS of the assignment is *not* a
+     dereference of pointer 'bootLoader'.  It is merely used as an
+     offset calculation.  VRP was erroneously removing the if()
+     because it thought that 'bootLoader' was always dereferenced.  */
+  int *boot = &bootLoader->x;
+
+  if (bootLoader)
+    {
+      useboot (boot);
+    }
+}
+
+int
+useboot (void *boot)
+{
+  abort ();
+}
+
+main()
+{
+  zap (0);
+  return 0;
+}