1 files changed, 50 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/20010124-1-lib.c b/gcc/testsuite/gcc.c-torture/execute/builtins/20010124-1-lib.c
new file mode 100644
index 000000000..5f6a7487f
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/20010124-1-lib.c
@@ -0,0 +1,50 @@
+/* Verify that structure return doesn't invoke memcpy on 
+   overlapping objects.  */
+
+extern void abort (void);
+extern int inside_main;
+typedef __SIZE_TYPE__ size_t;
+
+struct S {
+  char stuff[1024];
+};
+
+union U {
+  struct {
+    int space;
+    struct S s;
+  } a;
+  struct {
+    struct S s;
+    int space;
+  } b;
+};
+  
+struct S f(struct S *p)
+{
+  return *p;
+}
+
+void g(union U *p)
+{
+}
+
+void *memcpy(void *a, const void *b, size_t len)
+{
+  if (inside_main)
+    {
+      if (a < b && a+len > b)
+        abort ();
+      if (b < a && b+len > a)
+        abort ();
+      return a;
+    }
+  else
+    {
+      char *dst = (char *) a;
+      const char *src = (const char *) b;
+      while (len--)
+        *dst++ = *src++;
+      return a;
+    }
+}