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If an instruction is executed in an aligned region we can ignore threading effects and use CFG reasoning (dominance and reachability). This is true because all threads are together in an aligned region and there cannot be one waiting for a signal at a place not connected via the control flow. More dedicated tests will follow. More details can be found here: "Co-Designing an OpenMP GPU Runtime and Optimizations for Near-Zero Overhead Execution", IPDPS 2022, https://www.osti.gov/servlets/purl/1890094