[Bug other/48981] bootstrap-lto -O3 produces miscompiled, broken gcc

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48981

--- Comment #5 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 2011-05-14 00:51:44 UTC ---
(In reply to comment #4)

Then this comment in gengtype.c becomes no longer valid, and confusing:

   /* Record the definition of a generic VEC structure, as if we had expanded
      the macros in vec.h:

>     typedef struct VEC_<type>_base GTY(()) {
>     unsigned num;
>     unsigned alloc;
> -   <type> GTY((length ("%h.num"))) vec[1];
> +   <type> GTY((length ("%h.prefix.num"))) vec[1];
>     } VEC_<type>_base
>
>     where the GTY(()) tags are only present if is_scalar is _false_.  */

In vec.h:

> +#ifndef GTY
> +#define GTY(x)  /* nothing - marker for gengtype */
> +#endif

It could be fixed by changing the #include order in vec.c:

 #include "system.h"
+#include "coretypes.h"
 #include "ggc.h"
 #include "vec.h"
-#include "coretypes.h"
 #include "diagnostic-core.h"
 #include "hashtab.h"