[Ada] Do not generate SCO for use clause or rep clause

[Arnaud Charlet <charlet at adacore dot com>]

This change removes SCO generation for USE clauses and representation clauses,
which should not be subjected to coverage analysis.

The following compilation must produce a single statement SCO corresponding
to the declaration of type T:

$ gcc -c -gnateS no_sco.ads
$ grep "^CS" no_sco.ali
CS t3:4-3:25

with Ada;
package No_SCO is
   type T is range 0 .. 1;
   for T'Size use 1;
   use Ada;
end No_SCO;

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

2011-08-05  Thomas Quinot  <quinot@adacore.com>

	* par_sco.adb (Traverse_Declarations_Or_Statements): Do not generate a
	statement SCO for a USE clause or a representation clause.

Attachment: difs
Description: Text document