exp_ch6.adb (Expand_N_Function_Call): If stack checking is enabled...

2004-10-04  Ed Schonberg  <schonberg@gnat.com>

	* exp_ch6.adb (Expand_N_Function_Call): If stack checking is enabled,
	do not generate a declaration for a temporary if the call is part of a
	library-level instantiation.

From-SVN: r88495

gcc/ada/ChangeLog

 2004-10-04  Ed Schonberg  <schonberg@gnat.com>
 
+	* exp_ch6.adb (Expand_N_Function_Call): If stack checking is enabled,
+	do not generate a declaration for a temporary if the call is part of a
+	library-level instantiation.
+
+2004-10-04  Ed Schonberg  <schonberg@gnat.com>
+
 	* sem_util.adb (Explain_Limited_Type): Ignore internal components when
 	searching for a limited component to flag.
 

gcc/ada/exp_ch6.adb

@@ -2934,6 +2934,12 @@ package body Exp_Ch6 is
       --  this because otherwise gigi may generate a large temporary on the
       --  fly and this can cause trouble with stack checking.
 
+      --  This is unecessary if the call is the expression in an object
+      --  declaration, or if it appears outside of any library unit. This
+      --  can only happen if it appears as an actual in a library-level
+      --  instance, in which case a temporary will be generated for it once
+      --  the instance itself is installed.
+
       if May_Generate_Large_Temp (Typ)
         and then Nkind (Parent (N)) /= N_Assignment_Statement
         and then
@@ -2943,6 +2949,7 @@ package body Exp_Ch6 is
           (Nkind (Parent (N)) /= N_Object_Declaration
              or else Expression (Parent (N)) /= N)
         and then not Returned_By_Reference
+        and then Current_Scope /= Standard_Standard
       then
          if Stack_Checking_Enabled then