AbstractThis paper describes the implementation of a LIS compiler for GCOS‐7. LIS is a high level system implementation language developed at CII‐Honeywell Bull during the middle 1970s, and experience with the language and its implementation have largely influenced the design of Ada. The design of the compiler was particularly aimed at efficient code generation. Design decisions concerning the run‐time organization in relation to procedure call and separate compilation are discussed. The structure of the compiler is described. The articulation between the different phases of the code generator is emphasized. Experience with the bootstrap is re
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