[patch] Remove fold-const.h as a dependency for gimple.h

[Andrew MacLeod <amacleod at redhat dot com>]

I proposed including fold-const.h into gimple.h, but didn't notice that 
its actually only needed by one inline function. Moving that function to 
gimple.c means its no longer required.

160 places need cgraph.h, so by removing this dependency, the number of 
those files which still need fold-const.h drops to 108 uses.
The other 2 files are generally used by many of the files which include 
gimple.h, so trying to break those dependencies doesn't accomplish much.

This patch is currently undergoing testing, but expect no problems .  
Assuming it bootstraps on x86_64-unknown-linux-gnu with no new 
regressions, OK for trunk?

Andrew

	* gimple.h (gimple_call_set_fn): Move inline function.
	* gimple.c (gimple_call_set_fn): Relocate here.

Index: gimple.h
===================================================================
*** gimple.h	(revision 224985)
--- gimple.h	(working copy)
*************** extern gimple currently_expanding_gimple
*** 1296,1301 ****
--- 1296,1302 ----
  #define gimple_alloc(c, n) gimple_alloc_stat (c, n MEM_STAT_INFO)
  gimple gimple_alloc_stat (enum gimple_code, unsigned MEM_STAT_DECL);
  greturn *gimple_build_return (tree);
+ void gimple_call_set_fndecl (gimple, tree);
  void gimple_call_reset_alias_info (gcall *);
  gcall *gimple_build_call_vec (tree, vec<tree> );
  gcall *gimple_build_call (tree, unsigned, ...);
*************** gimple_call_set_fn (gcall *gs, tree fn)
*** 2759,2775 ****
  }
  
  
- /* Set FNDECL to be the function called by call statement GS.  */
- 
- static inline void
- gimple_call_set_fndecl (gimple gs, tree decl)
- {
-   GIMPLE_CHECK (gs, GIMPLE_CALL);
-   gcc_gimple_checking_assert (!gimple_call_internal_p (gs));
-   gimple_set_op (gs, 1, build_fold_addr_expr_loc (gimple_location (gs), decl));
- }
- 
- 
  /* Set internal function FN to be the function called by call statement CALL_STMT.  */
  
  static inline void
--- 2760,2765 ----
Index: gimple.c
===================================================================
*** gimple.c	(revision 224986)
--- gimple.c	(working copy)
*************** gimple_build_return (tree retval)
*** 199,204 ****
--- 199,214 ----
    return s;
  }
  
+ /* Set FNDECL to be the function called by call statement GS.  */
+ 
+ void
+ gimple_call_set_fndecl (gimple gs, tree decl)
+ {
+   GIMPLE_CHECK (gs, GIMPLE_CALL);
+   gcc_gimple_checking_assert (!gimple_call_internal_p (gs));
+   gimple_set_op (gs, 1, build_fold_addr_expr_loc (gimple_location (gs), decl));
+ }
+ 
  /* Reset alias information on call S.  */
  
  void