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SC33-0019-1
File No. S360/S370-29




DOS
PL/I Optimizing Compiler:
Program Product Execution Logic

PL/I Optimizing Compiler 5736-PL 1
PL/I Resident Library 5736-LM4
PL/I Transient Library 5736-LM5
(These products are also distri_buted
as composite package 5736-PL3)




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Second Edition (September, 1973)

This is a major revision of SC33-0019-0 and associated
technical newsletters.

Information has been inclu~ed on the new features that
are available with release 4 of the DOS PL/I Optimizing
Compiler as follows:
COUNT option - Chapter 7
New options for PLIDUMP - Chapter 12

A number of minor changes and corrections have also been
made throughout the book. A new topic heading "How
Addressed" has been added to the control block descriptions
in appendix A. Technical changes are marked with a vertical
line to the left of the change.

This edition applies to Version 1, Release 4, Modification 0
of the DOS PL/I Optimizing Compiler and to all subsequent
releases until otherwise indicated in new editions or
Technical Newsletters. Changes are continually made to the
information herein; before using this publication in
connection with the operation of IBM systems, consult the
latest IBM System/360 and System 370 Bibliography SRL
Newsletter, Order No. GA22-6822, for the editions that are
applicable and current.

Requests for copies of IBM publications should be made to
your IBM representative or to the IBM branch office serving
your locality.

A form for readers' comments is provided at the back of this
publication. If the form has been removed, comments may be
addressed to IB~l Uni ted Kingdom Laboratories Ltd., Programming
Publications, Hursley Park, Winchester, Hampshire, England.

eCopyright International Business' Machines Corporation 1971,
1972,t973.
Preface RECOMMENDED PUBLICATIONS



QQ~gL/I_gptimiz!~Compiler:
g~Qgrammer's Guid~, Order No. SC33-0008


QQS P1LI Optimizin~compiler: Language
Reference Manual, Order No. GC33-0005
The main purpose of this publication is to
explain, in general terms, the way in which
programs compiled by the DOS PLII System/370 Princi~Q~ratiQB, Order
Optimizing Compiler (Program Number 5736- No. GA22-7000
PL1) are executed. It describes the
organization of object programs produced by
the compiler, the contents of the In!~Qdu