Andrew Trick c1e0a1d999 Fix assertion in InstructionDeleter::trackIfDead. ...

This assertion was triggering when deleting scope-ending operations whose
operand had been replaced with an undef:

   end_borrow undef

Related to rdar://156431548

This was triggered during simplify-cfg by after adding blocks to the worklist,
then later cleaning up dead instructions in the worklist blocks. I'm unable to
create a test case based on simplify-cfg because the assertion is completely
unrelated to the optimization that adds blocks to the worklist.

2025-07-29 00:22:46 -07:00

18 KiB

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