[COMMITTED] ada: Use procedural variant of Next_Index where possible

["Marc Poulhiès" <poulhies@adacore.com>]

From: Piotr Trojanek <trojanek@adacore.com>

Code cleanup; semantics is unaffected.

gcc/ada/

	* einfo-utils.adb (Write_Entity_Info): Use procedural Next_Index.
	* sem_aggr.adb (Collect_Aggr_Bounds): Reuse local constant.
	(Resolve_Null_Array_Aggregate): Use procedural Next_Index.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/einfo-utils.adb | 2 +-
 gcc/ada/sem_aggr.adb    | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/gcc/ada/einfo-utils.adb b/gcc/ada/einfo-utils.adb
index fa28a9e0100..d1db66ff697 100644
--- a/gcc/ada/einfo-utils.adb
+++ b/gcc/ada/einfo-utils.adb
@@ -3171,7 +3171,7 @@ package body Einfo.Utils is
                Index := First_Index (Id);
                while Present (Index) loop
                   Write_Attribute (" ", Etype (Index));
-                  Index := Next_Index (Index);
+                  Next_Index (Index);
                end loop;
 
                Write_Eol;
diff --git a/gcc/ada/sem_aggr.adb b/gcc/ada/sem_aggr.adb
index 33c44c42a24..d9520ca8f4b 100644
--- a/gcc/ada/sem_aggr.adb
+++ b/gcc/ada/sem_aggr.adb
@@ -464,8 +464,8 @@ package body Sem_Aggr is
          This_Range : constant Node_Id := Aggregate_Bounds (N);
          --  The aggregate range node of this specific sub-aggregate
 
-         This_Low  : constant Node_Id := Low_Bound  (Aggregate_Bounds (N));
-         This_High : constant Node_Id := High_Bound (Aggregate_Bounds (N));
+         This_Low  : constant Node_Id := Low_Bound  (This_Range);
+         This_High : constant Node_Id := High_Bound (This_Range);
          --  The aggregate bounds of this specific sub-aggregate
 
          Assoc : Node_Id;
@@ -4175,7 +4175,7 @@ package body Sem_Aggr is
          Append (Make_Range (Loc, New_Copy_Tree (Lo), Hi), Constr);
          Analyze_And_Resolve (Last (Constr), Etype (Index));
 
-         Index := Next_Index (Index);
+         Next_Index (Index);
       end loop;
 
       Set_Compile_Time_Known_Aggregate (N);
-- 
2.40.0