[TIR] Update LowerTVMBuiltin to use Optional<T> #14400
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The member variables `device_type_` and `device_id_` are tracked during `LowerTVMBuiltin`, are initially undefined, and are checked before use. This is the usage pattern expected for `Optional<T>`, but these variables previously had the type `PrimExpr`. This commit updates these to `Optional<PrimExpr>`, and uses the helper function `GetDeviceMethodName` to add more detail to the error messages when they are undefined.
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masahi
approved these changes
Mar 30, 2023
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The member variables
device_type_anddevice_id_are tracked duringLowerTVMBuiltin, are initially undefined, and are checked before use. This is the usage pattern expected forOptional<T>, but these variables previously had the typePrimExpr.This commit updates these to
Optional<PrimExpr>, and uses the helper functionGetDeviceMethodNameto add more detail to the error messages when they are undefined.