Erik Eckstein 7e33e554ef SIL: a few changes regarding access to a GlobalVariable's static initializer instructions ...

* add `GlobalVariable.staticInitializerInstructions` to access all initializer instructions of a global
* implement `GlobalVariable.staticInitValue` with `GlobalVariable.staticInitializerInstructions`
* this requires that `InstructionList.reversed()` works without accessing the parent block of the iterator instruction
* allow `Context.erase(instruction:)` to delete instructions from a global's initializer list, which means to handle the case where a deleted instruction has no parent function.

2023-08-10 20:49:20 +02:00

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