Update break-false-deps to track updates to the machine function#202081
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Update break-false-deps to track updates to the machine function#202081juanvazquez wants to merge 1 commit into
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Follow-up on recommendation in llvm#194262 to track when breakPartialRegDependency will insert instructions, and return PreservedAnalyses::all() otherwise. * Introduce a Changed field to track changes: when the pass inserts instructions or modifies registers. * Modify the pass, when running with the new pass manager, to preserve analysis unless changes to the machine fuunction are done. * The pass is kept as is when running with the legacy pass manager. * Changes by breakPartialRegDependency() are tracked locally by diffing to do not modify the API.
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Follow-up on recommendation in #194262 to track when breakPartialRegDependency will insert instructions, and return PreservedAnalyses::all() otherwise.