Hi Marc ! Thanks for the reply. I tried -O1 and higher optimization levels but I don't see any difference. This is how I am building and loading my plugin... g++ -I`g++ -print-file-name=plugin`/include -fPIC -shared -O1 gimple_pass.c -o plugin.so g++ -fplugin=/home/sandeep/myplugin/gimple/plugin.so -O1 -c test.c Am I supposed to use "-O1" differently to invoke the CCP pass? Regards, Sandeep. On Tue, Jul 2, 2013 at 1:44 AM, Marc Glisse <marc.glisse@xxxxxxxx> wrote: > On Mon, 1 Jul 2013, Sandeep K Chaudhary wrote: > >> Hi guys, >> >> I am writing a GIMPLE pass in which I need to inspect the assignments. >> For example, for the below statements, I need to find the value of the >> second and third assignments which are '2' and '7'. >> >> VAR1 = 1; >> VAR1++; >> VAR1 = VAR1 + 5; >> >> But the GIMPLE IR only has the following statements i.e. no optimization. >> >> VAR1_2 = 1; >> VAR1_3 = VAR1_2 + 1; >> VAR1_4 = VAR1_3 + 5; >> >> How can I make it perform calculations on RHS? Are there some flags >> that I can enable? > > > -O1 (or higher) enables the CCP pass which propagates the constants. Note > that only the last value will be left after that. If you need the > intermediate ones for some reason, maybe you could look into the CCP pass > and modify it for your needs? > > -- > Marc Glisse -- Thanks and regards, Sandeep K Chaudhary.
