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codeql/cpp/ql/test/library-tests/dataflow/partialdefinitions/partialdefinitions.expected
Jonas Jensen 1b1095ee75 C++: Post-update flow through &, *, +, ...
Flow from a definition by reference of a field into its object was
working inconsistently and in a very syntax-dependent way. For a
function `f` receiving a reference, `f(a->x)` could propagate data back
to `a` via the _reverse read_ mechanism in the shared data-flow library,
but for a function `g` receiving a pointer, `g(&a->x)` would not work.
And `f((*a).x)` would not work either.

In all cases, the issue was that the shared data-flow library propagates
data backwards between `PostUpdateNode`s only, but there is no
`PostUpdateNode` for `a->x` in `g(&a->x)`. This pull request inserts
such post-update nodes where appropriate and links them to their
neighbors. In this exapmle, flow back from the output parameter of `g`
passes first to the `PostUpdateNode` of `&`, then to the (new)
`PostUpdateNode` of `a->x`, and finally, as a _reverse read_ with the
appropriate field projection, to `a`.
2020-05-01 15:40:19 +02:00

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| partialdefinitions.cpp:14:2:14:2 | partial def of s | partialdefinitions.cpp:14:2:14:2 | s | partialdefinitions.cpp:14:2:14:8 | ... = ... |
| partialdefinitions.cpp:14:4:14:4 | partial def of x | partialdefinitions.cpp:14:4:14:4 | x | partialdefinitions.cpp:14:2:14:8 | ... = ... |
| partialdefinitions.cpp:15:2:15:2 | partial def of s | partialdefinitions.cpp:15:2:15:2 | s | partialdefinitions.cpp:15:2:15:10 | ... = ... |
| partialdefinitions.cpp:15:4:15:4 | partial def of y | partialdefinitions.cpp:15:4:15:4 | y | partialdefinitions.cpp:15:2:15:10 | ... = ... |
| partialdefinitions.cpp:15:6:15:6 | partial def of z | partialdefinitions.cpp:15:6:15:6 | z | partialdefinitions.cpp:15:2:15:10 | ... = ... |
| partialdefinitions.cpp:22:29:22:32 | partial def of data | partialdefinitions.cpp:22:29:22:32 | data | partialdefinitions.cpp:22:29:22:40 | ... = ... |
| partialdefinitions.cpp:22:29:22:32 | partial def of this | file://:0:0:0:0 | this | partialdefinitions.cpp:22:29:22:40 | ... = ... |
| partialdefinitions.cpp:27:3:27:7 | partial def of myInt | partialdefinitions.cpp:27:3:27:7 | myInt | partialdefinitions.cpp:27:9:27:15 | call to setData |