Hi everyone, Can someone please help me with this? To briefly reiterate my issue (referring to my original post), how can I get the calculations on RHS in GIMPLE pass using some optimizations if possible? I tried to use the optimization flags as suggested by Marc but it does not work. Thanks and regards, Sandeep. On Tue, Jul 2, 2013 at 1:09 PM, Sandeep K Chaudhary <babbusandy2006@xxxxxxxxx> wrote: > 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. -- Thanks and regards, Sandeep K Chaudhary.
