Download e-book for iPad: A Retargetable C Compiler Design and Implementation by David R. Hanson

By David R. Hanson

ISBN-10: 0805316701

ISBN-13: 9780805316704

This new textual content examines the layout and implementation of Icc, a production-quality, retargetable compiler, designed at AT&T Bell Laboratories and Princeton collage for the ANSI c program languageperiod. The authors' leading edge process - a "literate software" that intermingles the textual content with the resource code - provides an in depth travel of the code that explains the implementation and layout judgements mirrored within the software program. And whereas so much books describe toy compilers or concentrate on remoted items of code, the authors have made on hand the whole resource code for a true compiler. established as a self-study consultant that describes the real-world tradeoffs encountered in construction a production-quality compiler, A Retargetable C Compiler can be helpful to people who paintings in program parts utilizing or developing language-based instruments and methods. positive aspects: discusses the implementation and layout tradeoffs made whereas developing a true ANSI C compiler, illustrating the interplay among thought and perform; covers compiler thought merely as had to comprehend the implementation of Icc, focusing as an alternative on useful, utilized matters; encourages a deeper realizing of programming in C, through supplying C programmers with a journey of the language from the viewpoint of compiler authors; comprises assurance of code turbines for the MIPS R3000, SPARC, and Intel 386 and its successors; and offers entry to the entire resource code for the Icc compiler, the 3 again ends, and the code-generator generator, both on disk or through FTP.

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Extra info for A Retargetable C Compiler Design and Implementation

Sample text

Storing all strings in a string table and using hashing to keep only one copy of any string is a scheme that's been used for years in compilers and related programming-language implementations, but it's rarely documented. It's used in SNOBOL4 (Griswold 1972), for example, to make comparison fast and to make it easy to use strings as keys in associative tables. Related techniques store strings in a separate string space, but don't bother to avoid storing multiple copies of the same string to simplify some string operations, such as substring and concatenation (Hansen 1992; Hanson 1974; McKeeman, Horning, and Wortman 1970).

12 describes how 1cc uses the three arenas. 3 Allocating Space Most allocations are trivial: Round the request amount up to the proper alignment boundary, increment the avai 1 pointer by the amount of the rounded request, and return the previous value. c types)+= union align { ..... 25 27 2. 3 • ALLOCATING SPACE 27 long l; char *p; double d; int (*f) ARGS((void)); }; Like malloc, allocate must return a pointer suitably aligned to hold values of any type. The size of the union al i gn gives the minimum such alignment on the host machine.

5 in Knuth (1973a) is the definitive reference. There is a long list of techniques that 26 allocate 19 NELEMS 24 NEW 97 PERM 30 stringn CHAPTER 2 • STORAGE MANAGEMENT 32 allocate 26 deallocate 28 are designed both for general-purpose use and for specific application areas, including the design described in this chapter (Hanson 1990). A competitive alternative is "quick fit" (Weinstock and Wulf 1988). Quick-fit allocators maintain N free lists for the N block sizes requested most frequently. , 8-128 bytes in multiples of eight bytes.

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A Retargetable C Compiler Design and Implementation by David R. Hanson

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