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View Thread: IL to C++ compiler - Need advice on implementing context switching
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    I wonder if it has something to do the the "dup" instructions.

    Yep. If you look at the generated code for IL3A-3F you can easily note that dup has no effect. If you remove the dup then your compiler would generate identical code. That's a good indication that something isn't right.

    So when I perform the dup operation, the two top items on the stack now contain "pStr".

    dup make a copy of the value, it seems to me that your implementation makes a copy of some sort of reference to the value.