On Fri, Jun 13, 2014 at 05:46:45PM +0100, Vladimir Makarov wrote: > On 2014-06-11, 1:17 PM, Chung-Lin Tang wrote: > > Looking at this too, as an LRA exercise. I don't really think the > > pattern is wrong, rather LRA should just avoid creating the copy in this > > case; it's a result of operand constraining, after all. > > > > Attached is the small LRA patch, pending testing. Vladimir should weight > > in on this. > > > > The patch is safe and ok. Thanks for working on it, Chung-Lin.
As this patch fixes a build failure on ARM I'd like to have it applied today. If I don't hear anything which would stop me, I'll commit this on Chung-Lin's behalf in a few hours. Cheers, James > > > * ira-lives.c (process_bb_lives): Skip creating copy during > > insn sca when src/dest has constrained to same regno. > > > >
