On 11/01/10 20:35, Diego Novillo wrote: > On Mon, Nov 1, 2010 at 19:57, Hongtao <yu...@purdue.edu> wrote: >> Hi All, >> >> While using gcc-4.6 with option -flto, I found that interprocedural >> analysis were performed on each source file separately. For example for >> the pass pass_ipa_pta, if we compile two files like : >> gcc -O -flto f1.c f2.c >> we have the pass run twice, one for each source file. So is there a way >> that can perform IPA on all source files together? > With -combine you used to be able to do this, but it has been removed > in favour of -flto (actually, I'm not quite sure whether it's been > removed already, but it's on the chopping block). > > With -flto, IPA will be performed on all the files together, as well > as each file separately. In your example, IPA runs 3 times. Once for > each f1.c and f2.c, and a third time with both f1.o and f2.o as a > single translation unit. Thanks. But can I only keep the third pass, i.e. I want to perform a pass only on all units together without on each unit separately?
Hongtao > Diego. >
