> -----Original Message----- > From: Georg-Johann Lay [mailto:a...@gjlay.de] > Sent: Thursday, October 13, 2011 8:32 AM > To: gcc-patches@gcc.gnu.org > Cc: Anatoly Sokolov; Denis Chertykov; Weddington, Eric > Subject: [Patch,AVR] Fix PR46278, Take #3 > > This is yet another attempt to fix PR46278 (fake X addressing). > > After the previous clean-ups it is just a small change. > > caller-saves.c tries to eliminate call-clobbered hard-regs allocated to > pseudos > around function calls and that leads to situations that reload is no more > capable to perform all requested spills because of the very few AVR's > address > registers. > > Thus, the patch adds a new target option -mstrict-X so that the user can > turn > that option if he like to do so, and then -fcaller-save is disabled. > > The patch passes the testsuite without regressions. Moreover, the > testsuite > passes without regressions if all test cases are run with -mstrict-X and > all > libraries (libgcc, avr-libc) are built with the new option turned on.
Hi Johann, Sorry, I haven't been keeping up with the discussion on this PR. But if all test cases pass with running -mstrict-X and everything built with that option on, then why is this even an option? Is it because that it may not always reduce code size?... Thanks, Eric
