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[Ada] Mimic the C++ ABI when passing class-wide conversion actuals

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This patch does not affect the behavior of Ada-only code but improves
consistency with the code generated by the C++ compiler.

2018-09-26  Javier Miranda  <miranda@adacore.com>

gcc/ada/

	* sem_res.adb (Resolve_Actuals): If the formal is a class-wide
	type conversion then do not skip resolving and expanding the
	conversion; required to displace the pointer to the object and
	reference the dispatch table associated with the target
	interface type.

From-SVN: r264624
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Javier Miranda 2018-09-26 09:18:29 +00:00 committed by Pierre-Marie de Rodat
parent 4f95defaa9
commit c886a94613
2 changed files with 9 additions and 0 deletions
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8
gcc/ada/ChangeLog
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@ -1,3 +1,11 @@
2018-09-26 Javier Miranda <miranda@adacore.com>
* sem_res.adb (Resolve_Actuals): If the formal is a class-wide
type conversion then do not skip resolving and expanding the
conversion; required to displace the pointer to the object and
reference the dispatch table associated with the target
interface type.
2018-09-26 Hristian Kirtchev <kirtchev@adacore.com>
* libgnat/g-dynhta.adb (Prepend_Or_Replace): Update the number

1
gcc/ada/sem_res.adb
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@ -3809,6 +3809,7 @@ package body Sem_Res is
if Ekind (F) /= E_In_Parameter
and then Nkind (A) = N_Type_Conversion
and then not Is_Class_Wide_Type (Etype (Expression (A)))
and then not Is_Interface (Etype (A))
then
if Ekind (F) = E_In_Out_Parameter
and then Is_Array_Type (Etype (F))