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vnmakarov / mir

A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
MIT License
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How to get offset of a variable to the stack bottom #349

Closed mttbx closed 1 year ago

mttbx commented 1 year ago

Hi, If I allocate an object on the stack. How can I know the offset of it to the stack bottom. Thus I can create a static const stack map to do gc.

vnmakarov commented 1 year ago

There is MIR_ALLOCA insn for this. It reserves stack memory of given size and returns address to it. The stack memory is automatically freed on the function exit.

MIR_ALLOCA is analogous to C alloca. The insn is actually used for implementing C alloca besides to stack allocation of structure or array type C variables.

mttbx commented 1 year ago

Thank you.