By A. C. Hartmann
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Extra resources for A Concurrent Pascal Compiler for Minicomputers
To summarize, then, a routine variant contains: the r o u t i n e mode the r o u t i n e label the parameter length the v a r i a b l e length the a d d i t i o n a l stack length. * the template v a r i a n t * A l l information associated with types is contained in the template v a r i a n t . This i n - formation includes: the name index the type length the active attributes the type "kind" information particular to individual kinds The name index of the type is retained. I t is transmitted in the intermediate code for use in type checking by body analysis.
Output formats are used f o r e n t r i e s : a value format and a routine format. formation is included in the value format. The f o l l o w i n g information appears in the value format: the address mode the address displacement the declaration context the type kind the type name index the type length. Only two Type i n - 40 The value format is preceded by one of two intermediate language operators. erators are var or vcomp. The var operator implies an unqualified variable. These opThe vcomp operator implies a qualified variable (a variable component).
Time e r r o r indication of the particular source line that f a i l e d . This permits a run- I0. Code Assembly * function * Code assembly is the l a s t compiler pass. gram to f i n a l machine code. I t completes the transformation o f the pro- Routine labels and jump labels are replaced by program addresses, stack lengths are inserted in routine entry and process i n i t i a l i z a t i o n in- s t r u c t i o n s , e r r o r messages are l i s t e d , and the constants table is output at the end o f the program.
A Concurrent Pascal Compiler for Minicomputers by A. C. Hartmann