From: Chris Wilson <cwilson@CS.Stanford.EDU>
Date: Thu, 19 Dec 96 19:51:10 PST
Subject: Re: HIGH -> LOW -> HIGH SUIF conversion.
Message-Id: <CMM.0.90.4.851053870.cwilson@Xenon.Stanford.EDU>

> Hello everyone,
> 
> 	Has anyone tried to extract HIGH_SUIF from LOW_SUIF 
> 	(which was previously in HIGH SUIF) ?
> 	
> 	It seems to be possible to annotate HIGH level information 
> 	from HIGH SUIF before  dismantling higher structure (FOR/IF/LOOP...)
> 	The HIGH SUIF can then be retrieved from annotated-LOW SUIF. 
> 
> 	Has anyone tried this ?
> 
> 
> 	Reason why i am looking at this :
> 
> 	For Data Flow Analysis, Basic Block creation and Control Flow Graph
> 	creation is easier to handle and manipulate on LOW SUIF since you get
> 	lists of instructions to work with. 
> 	But You don't want to lose your HIGH SUIF structure for doing flow 
> 	analysis.
> 
> 	thanx in advance for any thoughts/pointers/experiences
> 	in this matter.
> 
> Abhay

The ``structure'' program in basesuif implements a simple form of this
transformation.  If you run ``porky -ucf-opt'', then ``structure'',
then ``porky -find-fors'', it will construct structured control flow
out of unstructured control flow in many cases.  There are certainly
more agressive algorithms that could be used to handle more cases.

        --Chris

From: Abhay Kanhere <ask@csa.iisc.ernet.in>
Date: Fri, 20 Dec 1996 09:04:39 +0500 (GMT+0500)
Subject: HIGH -> LOW -> HIGH SUIF conversion.
Message-Id: <199612200404.JAA00431@niyama.csa.iisc.ernet.in>

Hello everyone,

	Has anyone tried to extract HIGH_SUIF from LOW_SUIF 
	(which was previously in HIGH SUIF) ?
	
	It seems to be possible to annotate HIGH level information 
	from HIGH SUIF before  dismantling higher structure (FOR/IF/LOOP...)
	The HIGH SUIF can then be retrieved from annotated-LOW SUIF. 

	Has anyone tried this ?


	Reason why i am looking at this :

	For Data Flow Analysis, Basic Block creation and Control Flow Graph
	creation is easier to handle and manipulate on LOW SUIF since you get
	lists of instructions to work with. 
	But You don't want to lose your HIGH SUIF structure for doing flow 
	analysis.

	thanx in advance for any thoughts/pointers/experiences
	in this matter.

Abhay
-- 
----------------------------------------------------------------------
Abhay Kanhere          research student    Indian Institute of Science 
www: http://www.csa.iisc.ernet.in/~ask    email: ask@csa.iisc.ernet.in