* exp_ch6.adb (Expand_Call): Add comment on handling of back end
intrinsic
* exp_intr.adb (Expand_Intrinsic_Call): Ignore unrecognized intrinsic,
leaving call unchanged.
This deals with the case where the pragma Import specified
an external name, to be handled by the back end.
* sem_prag.adb (Process_Import_Or_Interface): Do not check validity of
subprogram which is Imported with convention Intrinsic if an
External_Name argument is specified.
(Process_Import_Or_Interface): Properly diagnose link name argument.
(Inlining_Not_Possible): New name for Cannot_Inline, to avoid confusion
with Sem_Ch6.Cannot_Inline.
(Process_Inline): Provide separate warning for inapplicable inline
pragma.
(Cannot_Inline): Reject subprograms that have an at_end handler, so that
treatment is uniform on different targets.
From-SVN: r91882
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