https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106203
Bug ID: 106203
Summary: Allow to emit diagnostics at return edges for the exit
point as well as the call site
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: analyzer
Assignee: dmalcolm at gcc dot gnu.org
Reporter: tlange at gcc dot gnu.org
Target Milestone: ---
Currently, the region_model_context at return edges, created inside
program_state::on_edge, neither holds a stmt nor a stmt_finder and thus,
warnings at return edges are rejected by impl_region_model_context::warn.
PR105900 has 2 XFAILs inside allocation-size-(1|2).c because the call to
set_value (lhs, <returned_value>) happens at a return edge. Similarly, PR105888
also needs to emit a warning at a return edge, but for the callee's exit point.
David already expressed ideas on how to solve this:
- have two contexts for pop_frame: one in the old frame, the other in
the new frame (for the caller)
- generalize stmt_finder, so it can also update the supernode to use
- rework pop_frame (I've had to do this before, I've run into issues
like this before).
