On Thu, May 19, 2005 at 04:42:29PM +0200, Davide Pozza wrote: > Calling the get_def_operand for this statement with index 0, the > function has to return the tree corresponding to buf_13. > If the argument you are looking for is not call-clobbered (not in the call_clobbered_vars set) you can return NULL_TREE directly.
Otherwise, look for a match between the DECL in the argument (you may need to strip ADDR_EXPRs) and the SSA_NAME_VAR (op) for every v-may-def in the vops for the statement. All this will fail if GCC decided to cluster call-clobbered variables under .global_var. What exactly are you trying to do? Diego.
