On Tue, Nov 2, 2010 at 1:40 AM, Hongtao <yu...@purdue.edu> wrote: > 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?
If -flto-slim support gets merged then yes. Richard.
