SIL: support type dependent operands in all cast instructions. #31096
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We had this for some cast instructions, but not for cast instructions with address-types. Type dependent operands - like for dynamic self - are important for establishing a def-use relationship between the instruction/argument which defines the type and the instruction which uses the type. Missing those dependencies can cause instructions or the dynamic-self argument to be removed while the type is still used in a cast instruction. This change involved some class hierarchy gymnastics in SILInstruction.h. Fixes a compiler crash. rdar://problem/61816506
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@swift-ci test |
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Oops, this was my fault I think. Thank you! |
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We had this for some cast instructions, but not for cast instructions with address-types.
Type dependent operands - like for dynamic self - are important for establishing a def-use relationship between the instruction/argument which defines the type and the instruction which uses the type.
Missing those dependencies can cause instructions or the dynamic-self argument to be removed while the type is still used in a cast instruction.
This change involved some class hierarchy gymnastics in SILInstruction.h.
Fixes a compiler crash.
rdar://problem/61816506