This patch teaches the C and C++ FEs to expect ACC ENTER/EXIT DATA, ACC
UPDATE and ACC WAIT executable directives to be used inside compound
statements. This is to prevent situations such as
if (needs_wait)
#pragma acc wait
// do something else here
from generating unexpected code when the program is built without
-fopenacc. The C and C++ FEs already guard against such usages for
OpenMP executable directives.
This patch also included a tweak for the diagnostics generated by
oacc_enter_exit_data parser. The error message now more accurately
reports if an error is detected in an enter or exit data directive.
Is this patch OK for trunk?
Cesar
