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Non-instruction defs like arguments, constants or global values always dominate all instructions/uses inside the function. This case currently needs to be treated separately by the caller, see https://reviews.llvm.org/D89623#inline-832818 for an example. This patch makes the dominator tree APIs accept a Value instead of an Instruction and always returns true for the non-Instruction case. A complication here is that BasicBlocks are also Values. For that reason we can't support the dominates(Value *, BasicBlock *) variant, as it would conflict with dominates(BasicBlock *, BasicBlock *), which has different semantics. For the other two APIs we assert that the passed value is not a BasicBlock. Differential Revision: https://reviews.llvm.org/D89632 |
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