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- 1 commit
- 1 file changed
- 1 contributor
Commits on Mar 1, 2026
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Fix infinite recursion in GVN value-phi computation
The ValuePhiFinder can enter an infinite recursion cycle through lookup_value_phi_arg → compute_value_phi → compute_value_phi_for_binary → lookup_value_phi_arg when the same GVN instruction query is encountered again during recursive value-phi resolution. Add a `visited_queries` set to ValuePhiFinder that tracks which GVN instructions are currently being resolved on the call stack. If a query is seen a second time, bail out with None to break the cycle. The entry is removed after the recursive call returns (backtracking) so that the same query reached through a different non-cyclic branch is not incorrectly suppressed.
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