llvm-project

ddc98929 - Add operands to worklist when only used by deleted op (#86990)

Add operands to worklist when only used by deleted op (#86990) I believe the existing check to determine if an operand should be added is incorrect: `operand.use_empty() || operand.hasOneUse()`. This is because these checks do not take into account the fact that the op is being deleted. It hasn't been deleted yet, so `operand.use_empty()` cannot be true, and `operand.hasOneUse()` may be true if the op being deleted is the only user of the operand and it only uses it once, but it will fail if the operand is used more than once (e.g. something like `add %0, %0`). Instead, check if the op being deleted is the only _user_ of the operand. If so, add the operand to the worklist. Fixes #86765