On 5 January 2016 at 11:24, Cristina Georgiana Opriceana wrote: > Hello, > > I am trying to add a new gimple_opt pass to gcc 5.2. I wrote a simple > test code to register a new pass that also has a flag. > > I added the pass in passes.def and also declared it in tree-pass.h. I > recompiled gcc and it seems that my pass gets called (I printed some > output in the execute() function) when compiling gcc itself, but not > if I use gcc on an external file, for e.g: > > I expect that whenever I call: > > gcc -fsafestack file.c > > the pass would also be run on the code, but instead nothing happens. If this is an optimization pass then you need to enable optimization, using the -f option isn't sufficient. See https://gcc.gnu.org/wiki/FAQ#optimization-options