From: Ronan Desplanques <desplanq...@adacore.com>

Before this patch, Build_Static_Dispatch_Tables was called on generic
package bodies. While this has not been proved to cause any actual bug,
it was clearly inappropriate and also useless, so this patch removes
those calls.

gcc/ada/ChangeLog:

        * sem_ch10.adb (Analyze_Compilation_Unit): Check for generic bodies.
        * exp_disp.adb (Build_Dispatch_Tables): Likewise.

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

---
 gcc/ada/exp_disp.adb | 4 +++-
 gcc/ada/sem_ch10.adb | 8 +++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/gcc/ada/exp_disp.adb b/gcc/ada/exp_disp.adb
index 458b32c1730..080a2e1a6c1 100644
--- a/gcc/ada/exp_disp.adb
+++ b/gcc/ada/exp_disp.adb
@@ -413,7 +413,9 @@ package body Exp_Disp is
             if Nkind (D) = N_Package_Declaration then
                Build_Package_Dispatch_Tables (D);
 
-            elsif Nkind (D) = N_Package_Body then
+            elsif Nkind (D) = N_Package_Body
+              and then Ekind (Corresponding_Spec (D)) /= E_Generic_Package
+            then
                Build_Dispatch_Tables (Declarations (D));
 
             elsif Nkind (D) = N_Package_Body_Stub
diff --git a/gcc/ada/sem_ch10.adb b/gcc/ada/sem_ch10.adb
index 25bba9b6075..45aabadf21f 100644
--- a/gcc/ada/sem_ch10.adb
+++ b/gcc/ada/sem_ch10.adb
@@ -1225,9 +1225,15 @@ package body Sem_Ch10 is
 
       if Expander_Active and then Tagged_Type_Expansion then
          case Nkind (Unit_Node) is
-            when N_Package_Declaration | N_Package_Body =>
+            when N_Package_Declaration =>
                Build_Static_Dispatch_Tables (Unit_Node);
 
+            when N_Package_Body =>
+               if Ekind (Corresponding_Spec (Unit_Node)) /= E_Generic_Package
+               then
+                  Build_Static_Dispatch_Tables (Unit_Node);
+               end if;
+
             when N_Package_Instantiation =>
                Build_Static_Dispatch_Tables (Instance_Spec (Unit_Node));
 
-- 
2.43.0

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