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2019 Jun 14
4
Planned change to IR semantics: constant expressions never have undefined behavior
See https://reviews.llvm.org/D63036 for the full patch and description. Essentially, the Constant::canTrap API is going away. To make this work, the semantics of division and remainder constant expressions are changing slightly, so division by zero produces poison, not undefined behavior. (The corresponding instructions still have undefined behavior.) This change should make writing and