Convert remaining uses of value_range in ipa-*.cc to Value_Range.

Minor cleanups to get rid of value_range in IPA.  There's only one left,
but it's in the switch code which is integer specific.

gcc/ChangeLog:

	* ipa-cp.cc (decide_whether_version_node): Adjust comment.
	* ipa-fnsummary.cc (evaluate_conditions_for_known_args): Adjust
	for Value_Range.
	(set_switch_stmt_execution_predicate): Same.
	* ipa-prop.cc (ipa_compute_jump_functions_for_edge): Same.

3 files changed, 19 insertions, 15 deletions

diff --git a/gcc/ipa-cp.cc b/gcc/ipa-cp.cc
index a37f967..071c607 100644
--- a/gcc/ipa-cp.cc
+++ b/gcc/ipa-cp.cc
@@ -6294,8 +6294,7 @@ decide_whether_version_node (struct cgraph_node *node)
 	    {
 	      /* If some values generated for self-recursive calls with
 		 arithmetic jump functions fall outside of the known
-		 value_range for the parameter, we can skip them.  VR interface
-		 supports this only for integers now.  */
+		 range for the parameter, we can skip them.  */
 	      if (TREE_CODE (val->value) == INTEGER_CST
 		  && !plats->m_value_range.bottom_p ()
 		  && !ipa_range_contains_p (plats->m_value_range.m_vr,
diff --git a/gcc/ipa-fnsummary.cc b/gcc/ipa-fnsummary.cc
index a5f5a50..78cbb60 100644
--- a/gcc/ipa-fnsummary.cc
+++ b/gcc/ipa-fnsummary.cc
@@ -500,19 +500,20 @@ evaluate_conditions_for_known_args (struct cgraph_node *node,
 		  if (vr.varying_p () || vr.undefined_p ())
 		    break;
 
-		  value_range res;
+		  Value_Range res (op->type);
 		  if (!op->val[0])
 		    {
+		      Value_Range varying (op->type);
+		      varying.set_varying (op->type);
 		      range_op_handler handler (op->code);
 		      if (!handler
 			  || !res.supports_type_p (op->type)
-			  || !handler.fold_range (res, op->type, vr,
-						  value_range (op->type)))
+			  || !handler.fold_range (res, op->type, vr, varying))
 			res.set_varying (op->type);
 		    }
 		  else if (!op->val[1])
 		    {
-		      value_range op0;
+		      Value_Range op0 (op->type);
 		      range_op_handler handler (op->code);
 
 		      ipa_range_set_and_normalize (op0, op->val[0]);
@@ -530,14 +531,14 @@ evaluate_conditions_for_known_args (struct cgraph_node *node,
 		}
 	      if (!vr.varying_p () && !vr.undefined_p ())
 		{
-		  value_range res;
-		  value_range val_vr;
+		  int_range<2> res;
+		  Value_Range val_vr (TREE_TYPE (c->val));
 		  range_op_handler handler (c->code);
 
 		  ipa_range_set_and_normalize (val_vr, c->val);
 
 		  if (!handler
-		      || !res.supports_type_p (boolean_type_node)
+		      || !val_vr.supports_type_p (TREE_TYPE (c->val))
 		      || !handler.fold_range (res, boolean_type_node, vr, val_vr))
 		    res.set_varying (boolean_type_node);
 
@@ -1732,12 +1733,17 @@ set_switch_stmt_execution_predicate (struct ipa_func_body_info *fbi,
   int bound_limit = opt_for_fn (fbi->node->decl,
 				param_ipa_max_switch_predicate_bounds);
   int bound_count = 0;
-  value_range vr;
+  // This can safely be an integer range, as switches can only hold
+  // integers.
+  int_range<2> vr;
 
   get_range_query (cfun)->range_of_expr (vr, op);
   if (vr.undefined_p ())
     vr.set_varying (TREE_TYPE (op));
   tree vr_min, vr_max;
+  // TODO: This entire function could use a rewrite to use the irange
+  // API, instead of trying to recreate its intersection/union logic.
+  // Any use of get_legacy_range() is a serious code smell.
   value_range_kind vr_type = get_legacy_range (vr, vr_min, vr_max);
   wide_int vr_wmin = wi::to_wide (vr_min);
   wide_int vr_wmax = wi::to_wide (vr_max);
diff --git a/gcc/ipa-prop.cc b/gcc/ipa-prop.cc
index d93234e..41c8121 100644
--- a/gcc/ipa-prop.cc
+++ b/gcc/ipa-prop.cc
@@ -2348,7 +2348,6 @@ ipa_compute_jump_functions_for_edge (struct ipa_func_body_info *fbi,
   gcall *call = cs->call_stmt;
   int n, arg_num = gimple_call_num_args (call);
   bool useful_context = false;
-  value_range vr;
 
   if (arg_num == 0 || args->jump_functions)
     return;
@@ -2379,6 +2378,7 @@ ipa_compute_jump_functions_for_edge (struct ipa_func_body_info *fbi,
 	    useful_context = true;
 	}
 
+      Value_Range vr (TREE_TYPE (arg));
       if (POINTER_TYPE_P (TREE_TYPE (arg)))
 	{
 	  bool addr_nonzero = false;
@@ -2404,15 +2404,14 @@ ipa_compute_jump_functions_for_edge (struct ipa_func_body_info *fbi,
 	{
 	  if (TREE_CODE (arg) == SSA_NAME
 	      && param_type
-	      /* Limit the ranger query to integral types as the rest
-		 of this file uses value_range's, which only hold
-		 integers and pointers.  */
+	      && Value_Range::supports_type_p (TREE_TYPE (arg))
+	      && Value_Range::supports_type_p (param_type)
 	      && irange::supports_p (TREE_TYPE (arg))
 	      && irange::supports_p (param_type)
 	      && get_range_query (cfun)->range_of_expr (vr, arg)
 	      && !vr.undefined_p ())
 	    {
-	      value_range resvr = vr;
+	      Value_Range resvr (vr);
 	      range_cast (resvr, param_type);
 	      if (!resvr.undefined_p () && !resvr.varying_p ())
 		ipa_set_jfunc_vr (jfunc, resvr);