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r368237 attempted to improve fix-its for move warnings, but introduced some
regressions to -Wpessimizing-move. Revert that change and add the missing
test cases to the pessimizing move test to prevent future regressions.
llvm-svn: 373421
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Fix -Wpessimizing-move and -Wredundant-move when warning on initializer lists.
The new fix-it hints for removing the std::move call will now also suggest
removing the braces for the initializer list so that the resulting code will
still be compilable.
This fixes PR42832
llvm-svn: 368237
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Without DR1579 implemented, the only case for -Wredundant-move is for a
parameter being returned with the same type as the function return type. Also
include a check to verify that the move constructor will be used by matching
nodes in the AST dump.
llvm-svn: 243594
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Dependent types can throw off the analysis for these warnings, possibly giving
conflicting warnings and fix-its. Disabling the warning in template
instantiations will prevent this problem, and will still catch the
non-dependent cases in templates.
llvm-svn: 243538
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If we're returning a function parameter, copy elision isn't possible,
so we now warn for redundant move.
PR: 23819
Differential Revision: http://reviews.llvm.org/D11305
llvm-svn: 242600
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-Wpessimizing-move warns when a call to std::move would prevent copy elision
if the argument was not wrapped in a call. This happens when moving a local
variable in a return statement when the variable is the same type as the
return type or using a move to create a new object from a temporary object.
-Wredundant-move warns when an implicit move would already be made, so the
std::move call is not needed, such as when moving a local variable in a return
that is different from the return type.
Differential Revision: http://reviews.llvm.org/D7633
llvm-svn: 236075
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