Thank you so much, Prof. Khedkar ! I will go through the slides and other resources that you pointed out. GRC workshops/tutorials are great. These helped me get started with GCC when I knew almost nothing about GCC internals. I will get back with specific queries (if any) after going through these. Thanks and regards, Sandeep. On Tue, Dec 17, 2013 at 1:41 AM, Uday P. Khedker <uday@xxxxxxxxxxxxxx> wrote: > You may also want to go through the slides at > http://www.cse.iitb.ac.in/grc/gcc-workshop-13/index.php?page=slides. > > In particular, > http://www.cse.iitb.ac.in/grc/gcc-workshop-13/downloads/slides/Day1/gccw13-gimple-manipulation.pdf > and > http://www.cse.iitb.ac.in/grc/gcc-workshop-13/downloads/slides/Day2/gccw13-code-view.pdf > may be of help. > > Unfortunately there is some problem with playing the videos of the lectures > (http://www.cse.iitb.ac.in/grc/gcc-workshop-12/index.php?page=videos) but we > are working on that. > > Uday Khedker. > > Sandeep K Chaudhary wrote, On Tuesday 17 December 2013 11:54 AM: > >> Thank you so much for the reply, David ! >> >> I am not sure where exactly my pass gets invoked. I will try to find it. >> But the pass get invoked somewhere in the GIMPLE stage as shown in the >> GCC architecture[1]. >> How is it that one can dictate where the pass can be invoked? Can you >> please provide some pointers/links about this? >> >> But looking at the GCC architecture[1], I can see that the >> optimization passes come into picture only after GIMPLE and SSA stage. >> I dumped the IR and other related files using -fdump-tree-all with >> optimization flag -O1, and saw that the assignments have not been >> evaluated for test.c.004t.gimple as well as test.c.018t.ssa. >> >> Also, in test.c.025t.forwprop1 and test.c.029t.copyprop1, they totally >> get rid of everything in the assignments i.e. they only have the final >> evaluation of the variables which is not what I want as I need >> evaluation for individual statements. >> >> [2] provides a nice diagrammatic understanding of the relative >> invocations of GCC opt passes. It is quite helpful for understanding >> the relative positions of the passes. >> >> Thanks and regards, >> Sandeep. >> >> [1] >> http://en.wikibooks.org/wiki/GNU_C_Compiler_Internals/GNU_C_Compiler_Architecture >> [2] >> https://gcc-python-plugin.readthedocs.org/en/latest/tables-of-passes.html >> > > -- Thanks and regards, Sandeep K Chaudhary.
