David Gregg
I have moved to Trinity College Dublin where my
new homepage can be found.
This webpage is purely for archive purposes.
Project
I am a PhD student at the
Technische Univesität Wien where I am working on global
instruction scheduling for VLIW and other EPIC machines. I work
primarily on software pipelining loops containing if statements.
The project takes a two prong approach to multiple path speculation.
First, we are looking at the best approaches to scheduling general
DAG shaped regions of code. Our work includes looking at using
profile directed feedback for probability based scheduling; heuristics
for calculating height in the presence of multiple paths; avoiding
unnecessary speculation; the effects on instruction and data cache
of multiple path speculation; and reducing unnecessary code growth.
The second part of our work deals with software pipelining loops
containing multiple paths. We use software pipelining because it
creates much less code growth than loop unrolling. We are working
on a software pipelining algorithm that is heavily influenced by
our work on acyclic scheduling.
The project is funded by the Austrian Science Foundation (FWF). The experimental compiler and
machine simulator we are using is the Chameleon system from IBM's VLIW research group.
A list of my publications can be found here.
Research Activities
In March 2000, I presented a paper on my work at the CC 2000
International Conference on Compiler Construction. The paper deals with my software pipelining algorithm
-- Iteration Preselection.
I spent October 1999 working with the Advanced Ananlysis and Code
Optimization
(A3) group at the INRIA
research institute near Paris. The A3 group specialises in analysis
and optimisation for ILP machines. During my stay, I presented a talk
on my work. The slides for this talk can be found here.
In April 1999 I presented a talk on my
work at the Seminar on Instruction-Level Parallelism and Parallelizing
Compilation (
99161). This seminar took place at the Schloss Dagstuhl International
Conference and Research Centre for Computer Science.
Lecturing
I lecture on Code Generation at the Technische Universität Wien. The
course
concentrates on compiling for ILP machines, and takes place in the
Summer semester.
Other stuff...
My favorite newspaper is
The Irish Times
Computer industry gossip and rumours at
The Register
The annual Halloween
Punkin Chunk competition
American - Viennese
Phrase Book
David Gregg
dave@complang.tuwien.ac.at
(+431) 58801-58530,
FAX (+431) 58801-18598
Institut für Computersprachen E185/1
Technische Universität Wien
Argentinierstraße 8/
4
A-1040
Wien
Austria
Europe
