Re: Loop jamming!?

Joel Williamson <joelw@rsn.hp.com>
30 Jun 1997 22:52:52 -0400

          From comp.compilers
Related articles
Loop jamming!? wjhung@csie.nctu.edu.tw (1997-06-24)
Re: Loop jamming!? simmons@nortel.ca (Steve Simmons) (1997-06-30)
Re: Loop jamming!? joelw@rsn.hp.com (Joel Williamson) (1997-06-30)
Re: Loop jamming!? sven@customized.com (Sven) (1997-07-13)
Re: Loop jamming!? n8tm@aol.com (1997-07-16)
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Re: Loop jamming!? schow@nortel.ca (Stanley Chow) (1997-07-21)
Re: Loop jamming!? cdg@nullstone.com (Christopher Glaeser) (1997-07-22)
Re: Loop jamming!? n8tm@aol.com (1997-07-27)
[7 later articles]
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From: Joel Williamson <joelw@rsn.hp.com>
Newsgroups: comp.compilers
Date: 30 Jun 1997 22:52:52 -0400
Organization: Hewlett Packard/Convex
References: 97-06-089
Keywords: optimize

> Is there anyone that understands the keyword "loop jamming".

Loop-jamming is often used as a synonym for loop-fusion:

do i = 1, n
a(i) = b(i) + c(i)
enddo
do i = 1, n
e(i) = f(i) + g(i)
enddo
becomes:

   do i = 1, n
a(i) = b(i) + c(i)
e(i) = f(i) + g(i)
enddo

Often used to jam many congruent Fortran 90 array assignment statements
into one loop to reduce loop overhead, where doing so does not introduce
any loop-carried-dependences.

Best regards,

Joel Williamson
--

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