delete #include "tm.h" from a few basic datastructures

The patch below deletes #includes for tm.h and a few other "huh?"
headers from source files for basic GCC datastructures.

Tested on x86_64-unknown-linux-gnu.  OK to commit?

-Nathan

	* bitmap.c: Delete unnecessary includes.
	* ebitmap.c: Likewise.
	* et-forest.c: Likewise.
	* sreal.c: Likewise.
	* statistics.c: Likewise.
	* stringpool.c: Likewise.
	* double-int.c: Add comment for inclusion of tm.h.

On Tue, Nov 16, 2010 at 2:49 PM, Nathan Froyd <froydnj@codesourcery.com> wrote:
> The patch below deletes #includes for tm.h and a few other "huh?"
> headers from source files for basic GCC datastructures.
>
> Tested on x86_64-unknown-linux-gnu.  OK to commit?

Ok.

Thanks,
Richard.

> -Nathan
>
>        * bitmap.c: Delete unnecessary includes.
>        * ebitmap.c: Likewise.
>        * et-forest.c: Likewise.
>        * sreal.c: Likewise.
>        * statistics.c: Likewise.
>        * stringpool.c: Likewise.
>        * double-int.c: Add comment for inclusion of tm.h.
>
> diff --git a/gcc/bitmap.c b/gcc/bitmap.c
> index f2fd2bd..7f533ed 100644
> --- a/gcc/bitmap.c
> +++ b/gcc/bitmap.c
> @@ -21,9 +21,6 @@ along with GCC; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
> -#include "rtl.h"
> -#include "flags.h"
>  #include "obstack.h"
>  #include "ggc.h"
>  #include "bitmap.h"
> diff --git a/gcc/double-int.c b/gcc/double-int.c
> index f3501a5..9e32b39 100644
> --- a/gcc/double-int.c
> +++ b/gcc/double-int.c
> @@ -20,7 +20,7 @@ along with GCC; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
> +#include "tm.h"                        /* For SHIFT_COUNT_TRUNCATED.  */
>  #include "tree.h"
>  #include "toplev.h"
>
> diff --git a/gcc/ebitmap.c b/gcc/ebitmap.c
> index cb52468..c57d141 100644
> --- a/gcc/ebitmap.c
> +++ b/gcc/ebitmap.c
> @@ -21,10 +21,6 @@ along with GCC; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
> -#include "rtl.h"
> -#include "flags.h"
> -#include "obstack.h"
>  #include "ebitmap.h"
>
>  /* The ebitmap data structure is a sparse bitmap structure that works
> diff --git a/gcc/et-forest.c b/gcc/et-forest.c
> index 94757c0..b35d063 100644
> --- a/gcc/et-forest.c
> +++ b/gcc/et-forest.c
> @@ -26,7 +26,6 @@ License along with libiberty; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
>  #include "et-forest.h"
>  #include "alloc-pool.h"
>
> diff --git a/gcc/sreal.c b/gcc/sreal.c
> index 415a02c..df35ddd 100644
> --- a/gcc/sreal.c
> +++ b/gcc/sreal.c
> @@ -52,7 +52,6 @@ along with GCC; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
>  #include "sreal.h"
>
>  static inline void copy (sreal *, sreal *);
> diff --git a/gcc/statistics.c b/gcc/statistics.c
> index b7bfd45..873bbc3 100644
> --- a/gcc/statistics.c
> +++ b/gcc/statistics.c
> @@ -26,7 +26,6 @@ along with GCC; see the file COPYING3.  If not see
>  #include "tree-dump.h"
>  #include "statistics.h"
>  #include "hashtab.h"
> -#include "tm.h"
>  #include "function.h"
>
>  static int statistics_dump_nr;
> diff --git a/gcc/stringpool.c b/gcc/stringpool.c
> index 8d45a26..747db17 100644
> --- a/gcc/stringpool.c
> +++ b/gcc/stringpool.c
> @@ -29,7 +29,6 @@ along with GCC; see the file COPYING3.  If not see
>  #include "config.h"
>  #include "system.h"
>  #include "coretypes.h"
> -#include "tm.h"
>  #include "ggc.h"
>  #include "ggc-internal.h"
>  #include "tree.h"
>