re PR middle-end/56524 (Compiler ICE when compiling with -mips16)

gcc/
	PR middle-end/56524
	* tree.h (tree_optimization_option): Rename target_optabs to optabs.
	Add base_optabs.
	(TREE_OPTIMIZATION_OPTABS): Update after previous field change.
	(TREE_OPTIMIZATION_BASE_OPTABS): New macro.
	(save_optabs_if_changed): Replace with...
	(init_tree_optimization_optabs): ...this.
	* optabs.c (save_optabs_if_changed): Rename to...
	(init_tree_optimization_optabs): ...this.  Take the optimization node
	as argument.  Do nothing if the base optabs are already correct.
	Reuse the existing TREE_OPTIMIZATION_OPTABS memory if we need
	to recompute optabs.
	* function.h (function): Remove optabs field.
	* function.c (invoke_set_current_function_hook): Call
	init_tree_optimization_optabs.  Use the result to initialize
	this_fn_optabs.

gcc/c-family/
	PR middle-end/56524
	* c-common.c (handle_optimize_attribute): Don't call
	save_optabs_if_changed.

gcc/testsuite/
	PR middle-end/56524
	* gcc.target/mips/pr56524.c: New test.

From-SVN: r196570

1 files changed, 6 insertions, 17 deletions

diff --git a/gcc/function.c b/gcc/function.c
index 1b41cf2..e673f21 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -4400,25 +4400,14 @@ invoke_set_current_function_hook (tree fndecl)
 	}
 
       targetm.set_current_function (fndecl);
+      this_fn_optabs = this_target_optabs;
 
-      if (opts == optimization_default_node)
-	this_fn_optabs = this_target_optabs;
-      else
+      if (opts != optimization_default_node)
 	{
-	  struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
-	  if (fn->optabs == NULL)
-	    {
-	      if (this_target_optabs == &default_target_optabs)
-		fn->optabs = TREE_OPTIMIZATION_OPTABS (opts);
-	      else
-		{
-		  fn->optabs = (unsigned char *)
-		    ggc_alloc_atomic (sizeof (struct target_optabs));
-		  init_all_optabs ((struct target_optabs *) fn->optabs);
-		}
-	    }
-	  this_fn_optabs = fn->optabs ? (struct target_optabs *) fn->optabs
-	                              : this_target_optabs;
+	  init_tree_optimization_optabs (opts);
+	  if (TREE_OPTIMIZATION_OPTABS (opts))
+	    this_fn_optabs = (struct target_optabs *)
+	      TREE_OPTIMIZATION_OPTABS (opts);
 	}
     }
 }