c-family: Use -Wdiscarded-qualifiers for ignored qualifiers in __atomic_*

This matches other compiler diagnostics.  No test updates are needed
because c-c++-common/pr95378.c does not match a specific -W option.

Fixes commit d2384b7b24f8557b66f6958a05ea99ff4307e75c ("c-family:
check qualifiers of arguments to __atomic built-ins (PR 95378)").

gcc/c-family/

	PR c/113050
	* c-common.cc (get_atomic_generic_size): Use
	OPT_Wdiscarded_qualifiers instead of
	OPT_Wincompatible_pointer_types.

diff --git a/gcc/c-family/c-common.cc b/gcc/c-family/c-common.cc
index 0f1de44a3481af544eb4900aa78fb729e767f3bf..6ea727f446f4ff9987d423166c33ade112605bb3 100644 (file)
--- a/gcc/c-family/c-common.cc
+++ b/gcc/c-family/c-common.cc
@@ -7637,7 +7637,7 @@ get_atomic_generic_size (location_t loc, tree function,
                return 0;
              }
            else
-             pedwarn (loc, OPT_Wincompatible_pointer_types, "argument %d "
+             pedwarn (loc, OPT_Wdiscarded_qualifiers, "argument %d "
                       "of %qE discards %<const%> qualifier", x + 1,
                       function);
          }
@@ -7651,7 +7651,7 @@ get_atomic_generic_size (location_t loc, tree function,
                return 0;
              }
            else
-             pedwarn (loc, OPT_Wincompatible_pointer_types, "argument %d "
+             pedwarn (loc, OPT_Wdiscarded_qualifiers, "argument %d "
                       "of %qE discards %<volatile%> qualifier", x + 1,
                       function);
          }