On Wed, Apr 30, 2014 at 2:16 PM, Benedikt Huber <benedikt.hu...@theobroma-systems.com> wrote: > Thank you for the hint. I managed to extract the basic blocks to a helper > function and put > a call to this helper function at the place of the removed basic blocks in > the original function. > All this is done with help of move_sese_region_to_fn. > The helper function is created similar to create_omp_child_function. > I had a successful compilation run when I moved the pass just after > pass_build_cgraph_edges. > > The problems I am still facing is with passing of parameters. > I imagine that variables used in the helper function which are defined in the > original function > should become in-out parameters to the helper function. > For that I wanted to use DECL_ARGUMENTS and the arguments to > gimple_build_call or gimple_build_call_vec. > However, how do I find the undefined variables in the helper function and how > do I find out to > which variables in the original function they belong. In particular, how do I > get the names and order > in the argument list right? > Do you know of some equally useful examples? > To me it seems that what is done in omp-low.c (expand_omp_taskreg or > expand_omp_target) is not > exactly what I need.
But it's very similar. Other than you need to figure out what variables are used in the region yourself. The autopar code (tree-parloops.c) may have more what you have in mind (though the code is very old and I consider it ugly as hell). It also uses the omp lowering infrastructure to do the actual outlining. Richard. > Thank you again and best regards, > Benedikt
