Sathya Gunasekaran 3aaf8be25c [hir] Use a stable identity for undefined value ...

InferReferenceEffects uses object identity to merge states, which breaks when we 
create a new object to model `undefined`. 

Two value objects representing `undefined` are not equal due to referential 
equality. 

Instead, let's use a singleton to represent `undefined` value.

2023-10-04 12:11:35 +05:30

compiler

[hir] Use a stable identity for undefined value

2023-10-04 12:11:35 +05:30

S

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