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;
+}