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Merged non-descriptor changes:
revision 1.2.1.1 date: 90/04/08 20:46:50; author: ram; state: Exp; lines added/del: 38/32 Deleted support for IR2-ENVIRONMENT-BLOCKS. Changed handling of TR local calls now that they are represented by a BLOCK-SUCC link. We have to notice the call and not traverse the link so that code will contiguous in a function, but we try to get a drop-through by returning the function we want to call so that it will be walked next if possible. Also added code to remove from the IR2-component-values-XXX lists any blocks that we delete due to unreachability. This is now necessary, since control analysis runs after LTN (so that we know which calls are TR.)
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