[PATCH] Fix PR47411

[Richard Guenther]

On Tue, 25 Jan 2011, Eric Botcazou wrote:

> > This should fix PR47411
> >
> > Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
> 
> Thanks.  There was a (platform-independent) testcase in the PR.

Committed to trunk and branch.

Richard.

2011-01-25  Richard Guenther  <rguenther@suse.de>

	PR middle-end/47411
	* gcc.dg/torture/pr47411.c: New testcase.

Index: gcc/testsuite/gcc.dg/torture/pr47411.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr47411.c	(revision 0)
+++ gcc/testsuite/gcc.dg/torture/pr47411.c	(revision 0)
@@ -0,0 +1,42 @@
+/* { dg-do compile } */
+
+typedef long unsigned int size_t;
+
+static __inline void *
+__inline_memcpy_chk (void *__dest, const void *__src, size_t __len)
+{
+  return __builtin___memcpy_chk (__dest, __src, __len, __builtin_object_size (__dest, 0));
+}
+
+extern void *xmalloc (size_t) __attribute__ ((__malloc__));
+
+struct htab { void ** entries; };
+
+typedef struct htab *htab_t;
+
+extern void ** htab_find_slot (htab_t, const void *);
+
+enum mode_class { MODE_RANDOM, MODE_CC, MODE_INT, MAX_MODE_CLASS };
+
+struct mode_data
+{
+  struct mode_data *next;
+  enum mode_class cl;
+};
+
+static const struct mode_data blank_mode = { 0, MAX_MODE_CLASS };
+
+static htab_t modes_by_name;
+
+struct mode_data *
+new_mode (void)
+{
+  struct mode_data *m
+    = ((struct mode_data *) xmalloc (sizeof (struct mode_data)));
+
+  ((__builtin_object_size (m, 0) != (size_t) -1) ? __builtin___memcpy_chk (m, &blank_mode, sizeof (struct mode_data), __builtin_object_size (m, 0)) : __inline_memcpy_chk (m, &blank_mode, sizeof (struct mode_data)));
+
+  *htab_find_slot (modes_by_name, m) = m;
+
+  return m;
+}