On Tue, Oct 13, 2015 at 05:03:36PM -0400, Vladimir Makarov wrote: [snip] > I checked my article > > ftp://ftp.uvsq.fr/pub/gcc/summit/2004/Fighting%20Register%20Pressure.pdf > > and GVN gave mostly 0.2% on eon only. The current environment is > quite different (IRA, LRA) so the results might be different too. > > Also as I remember I implemented GVN only for pseudos. > > LRA also checks values too but again only for reload and original pseudos.
Do you still have the branches you've tested back then? I'd really like to try how this patch affects other targets (big endian?). Gcc seems to do a better job optimising code for x86 in some complicated situations, so the extra logic might pay off more on other targets. Ciao Dominik ^_^ ^_^ -- Dominik Vogt IBM Germany
