ada: Spurious error on function returning CPP type

gcc/ada/

	* exp_ch6.adb
	(Needs_BIP_Alloc_Form): Return False for functions with foreign
	convention since we never use build-in-place for such functions.

1 files changed, 6 insertions, 1 deletions

diff --git a/gcc/ada/exp_ch6.adb b/gcc/ada/exp_ch6.adb
index af7f75342fa..b8e5a720a7c 100644
--- a/gcc/ada/exp_ch6.adb
+++ b/gcc/ada/exp_ch6.adb
@@ -9435,9 +9435,14 @@ package body Exp_Ch6 is
       --  types, and those can be used to call primitives, so the formal needs
       --  to be passed to all such build-in-place functions, primitive or not.
 
+      --  We never use build-in-place if the function has foreign convention,
+      --  but note that it is OK for a build-in-place function to return a
+      --  type with a foreign convention because the machinery ensures there
+      --  is no copying.
+
       return not Restriction_Active (No_Secondary_Stack)
         and then (Needs_Secondary_Stack (Typ) or else Is_Tagged_Type (Typ))
-        and then not Has_Foreign_Convention (Typ);
+        and then not Has_Foreign_Convention (Func_Id);
    end Needs_BIP_Alloc_Form;
 
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