[Ada] Small cleanup in Eval_Integer_Literal

[Ada] Small cleanup in Eval_Integer_Literal

[Pierre-Marie de Rodat]

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This removes an unreachable case in a nested predicate function as well
as trims down a verbose condition.  No functional changes.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

	* sem_eval.ads (Check_Non_Static_Context): Update documentation.
	* sem_eval.adb (In_Any_Integer_Context): Change parameter type,
	adjust accordingly and remove unreachable case.
	(Eval_Integer_Literal): Consider the node kind throughout and
	trim down verbose condition.

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diff --git a/gcc/ada/sem_eval.adb b/gcc/ada/sem_eval.adb
--- a/gcc/ada/sem_eval.adb
+++ b/gcc/ada/sem_eval.adb
@@ -2845,7 +2845,7 @@ package body Sem_Eval is
    --  the expander that do not correspond to static expressions.
 
    procedure Eval_Integer_Literal (N : Node_Id) is
-      function In_Any_Integer_Context (Context : Node_Id) return Boolean;
+      function In_Any_Integer_Context (K : Node_Kind) return Boolean;
       --  If the literal is resolved with a specific type in a context where
       --  the expected type is Any_Integer, there are no range checks on the
       --  literal. By the time the literal is evaluated, it carries the type
@@ -2856,23 +2856,21 @@ package body Sem_Eval is
       -- In_Any_Integer_Context --
       ----------------------------
 
-      function In_Any_Integer_Context (Context : Node_Id) return Boolean is
+      function In_Any_Integer_Context (K : Node_Kind) return Boolean is
       begin
          --  Any_Integer also appears in digits specifications for real types,
          --  but those have bounds smaller that those of any integer base type,
          --  so we can safely ignore these cases.
 
-         return
-           Nkind (Context) in N_Attribute_Definition_Clause
-                            | N_Attribute_Reference
-                            | N_Modular_Type_Definition
-                            | N_Number_Declaration
-                            | N_Signed_Integer_Type_Definition;
+         return K in N_Attribute_Definition_Clause
+                   | N_Modular_Type_Definition
+                   | N_Number_Declaration
+                   | N_Signed_Integer_Type_Definition;
       end In_Any_Integer_Context;
 
       --  Local variables
 
-      Par : constant Node_Id   := Parent (N);
+      PK  : constant Node_Kind := Nkind (Parent (N));
       Typ : constant Entity_Id := Etype (N);
 
    --  Start of processing for Eval_Integer_Literal
@@ -2890,12 +2888,11 @@ package body Sem_Eval is
       --  Check_Non_Static_Context on an expanded literal may lead to spurious
       --  and misleading warnings.
 
-      if (Nkind (Par) in N_Case_Expression_Alternative | N_If_Expression
-           or else Nkind (Par) not in N_Subexpr)
-        and then (Nkind (Par) not in N_Case_Expression_Alternative
-                                   | N_If_Expression
-                   or else Comes_From_Source (N))
-        and then not In_Any_Integer_Context (Par)
+      if (PK not in N_Subexpr
+           or else (PK in N_Case_Expression_Alternative | N_If_Expression
+                     and then
+                    Comes_From_Source (N)))
+        and then not In_Any_Integer_Context (PK)
       then
          Check_Non_Static_Context (N);
       end if;


diff --git a/gcc/ada/sem_eval.ads b/gcc/ada/sem_eval.ads
--- a/gcc/ada/sem_eval.ads
+++ b/gcc/ada/sem_eval.ads
@@ -149,10 +149,9 @@ package Sem_Eval is
    --
    --  Note: most cases of non-static context checks are handled within
    --  Sem_Eval itself, including all cases of expressions at the outer level
-   --  (i.e. those that are not a subexpression). Currently the only outside
-   --  customer for this procedure is Sem_Attr (because Eval_Attribute is
-   --  there). There is also one special case arising from ranges (see body of
-   --  Resolve_Range).
+   --  (i.e. those that are not a subexpression). The outside customers for
+   --  this procedure are Sem_Aggr, Sem_Attr (because Eval_Attribute is there)
+   --  and Sem_Res (for a special case arising from ranges, see Resolve_Range).
    --
    --  Note: this procedure is also called by GNATprove on real literals
    --  that are not sub-expressions of static expressions, to convert them to