On Mon, Sep 05, 2022 at 02:25:29PM +0800, Jiufu Guo wrote: > > On Fri, Sep 02, 2022 at 02:56:21PM +0800, Jiufu Guo wrote: > > Or force the testcase to use r0 some other way. Well, "forcing" cannot > > be done, but we can probably encourage it (via a local register asm for > > example, or by tying the var to the output of an asm that is hard reg 0, > > or perhaps there are other ways as well :-) ) > Specify register is very helpful here! Both below two cases could help > register 0 to be selected for a variable. Great! Thanks!
> >> The reason of using "(?n)^\s+[a-z]" is to keep this test case pass no > >> matter the splitter running before or after RA. > > > > Ah. Some short comment in the testcase please? > Thanks. We can check individual instructions to check better asm > pli+pli+rldimi is generated, since the splitter could run in split1 pass. It's always a tradeoff: if we scan for too specific code the testcase will need a lot of maintenance, and that does not scale. If on the other hand we do test less than we really want, well, that is less than we really want to test :-) The changes / additions we agreed to are preapproved btw. But please post the thing you eventually commit to the mailing list :-) Segher
