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r335795 adds copy elision information to CFG. This commit allows static analyzer
to elide elidable copy constructors by constructing the objects that were
previously subject to elidable copy directly in the target region of the copy.
The chain of elided constructors may potentially be indefinitely long. This
only happens when the object is being returned from a function which in turn is
returned from another function, etc.
NRVO is not supported yet.
Differential Revision: https://reviews.llvm.org/D47671
llvm-svn: 335800
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Don't enable c++-temp-dtor-inlining by default yet, due to this reference
counting pointe problem.
Otherwise the new mode seems stable and allows us to incrementally fix C++
problems in much less hacky ways.
Differential Revision: https://reviews.llvm.org/D43804
llvm-svn: 326461
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Temporary destructors fire at the end of the full-expression. It is reasonable
to attach the path note for entering/leaving the temporary destructor to its
CXXBindTemporaryExpr. This would not affect lifetime-extended temporaries with
their automatic destructors which aren't temporary destructors.
The path note may be confusing in the case of destructors after elidable copy
constructors.
Differential Revision: https://reviews.llvm.org/D43144
llvm-svn: 325284
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