c++: Tweaks for -Wredundant-move [PR107363]
Two things here:
1) when we're pointing out that std::move on a constant object is
redundant, don't say "in return statement" when we aren't in a
return statement;
2) suppress the warning when the std::move call was dependent, because
removing the std::move may not be correct for a different
instantiation of the original template.
PR c++/107363
gcc/cp/ChangeLog:
* semantics.cc (finish_call_expr): Suppress OPT_Wpessimizing_move.
* typeck.cc (maybe_warn_pessimizing_move): Check warn_redundant_move
and warning_suppressed_p. Adjust a message depending on return_p.
(check_return_expr): Don't suppress OPT_Wpessimizing_move here.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/Wredundant-move13.C: New test.