Question about DEC's optimizing compilers in RISC ULTRIX

ehyde@top.cis.syr.edu (Elaine Hyde)
Tue, 9 Jul 91 08:30:38 EDT

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Question about DEC's optimizing compilers in RISC ULTRIX ehyde@top.cis.syr.edu (1991-07-09)
run-time profile influencing code generation presberg@compass.com (1991-07-26)
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Newsgroups: comp.compilers
From: ehyde@top.cis.syr.edu (Elaine Hyde)
Keywords: Fortran, question
Organization: CIS Dept., Syracuse University
Date: Tue, 9 Jul 91 08:30:38 EDT

The f77 and cc compiler have a -feedback option:


-feedback file
Specifies the file to be used as a feedback file
(used with the -cord option). This file is produced
by prof(1) with its -feedback option from an execu-
tion of the program produced by pixie(1).


This seems like an *excellent* feature: being able to optimize with
respect to both static and dynamic information!


Could anyone please tell me


(1) Is the incorporation of dynamic information unique to DEC ultrix compilers?


(2) Are there any references (theory or implementation) for the use of dynamic
analysis for code optimization?


Thanks very much in advance.


Elaine Hyde
ehyde@top.cis.syr.edu
--

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