On 07/19/2011 08:08 AM, Paulo J. Matos wrote: > So, this seems to have to do with the post-reload comparison optimization > pass Richard mentioned.
Exactly. > But I am still confused as to how GCC matches them. Is *_flags any > special name GCC loops for (doubtful)? No, and as you can see from the leading "*" in the name, the name is not actually visible as a pattern. As an experiment, please read the comment at the start of the compare-elim.c file. If you still do not understand how the patch works, that suggests the documentation needs improvement. r~
