> 2013-04-29 Radovan Obradovic <robrado...@mips.com> > Tom de Vries <t...@codesourcery.com> > > * cgraph.h (struct cgraph_node): Add function_used_regs, > function_used_regs_initialized and function_used_regs_valid fields. > * final.c: Move include of hard-reg-set.h to before rtl.h to declare > find_all_hard_reg_sets. > (collect_fn_hard_reg_usage, get_call_fndecl, get_call_cgraph_node) > (get_call_reg_set_usage): New function. > (rest_of_handle_final): Use collect_fn_hard_reg_usage. > --- > gcc/cgraph.h | 7 ++++ > gcc/final.c | 117 > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- > gcc/regs.h | 4 ++ > 3 files changed, 127 insertions(+), 1 deletion(-) > > diff --git a/gcc/cgraph.h b/gcc/cgraph.h > index 84fc1d9..bbbbd1f 100644 > --- a/gcc/cgraph.h > +++ b/gcc/cgraph.h > @@ -408,6 +408,13 @@ public: > /* Time profiler: first run of function. */ > int tp_first_run; > > + /* Call unsaved hard registers really used by the corresponding > + function (including ones used by functions called by the > + function). */ > + HARD_REG_SET function_used_regs; > + /* Set if function_used_regs is valid. */ > + unsigned function_used_regs_valid: 1; > +
This approach seems resonable, but please move the data into cgraph_rtl_info substructure and access it via cgraph_rtl_info. (I have plan to move it off cgraph_node, so it doesn't consume memory at WPA stage) The cgraph bits are OK with this change. I am sorry for late reply, Honza
