On Sat, Feb 4, 2012 at 12:46 AM, Alan Modra <amo...@gmail.com> wrote: > http://gcc.gnu.org/ml/gcc-patches/2007-01/msg01835.html changed the > code I'm tweaking here to use DFmode subregs when loading a TFmode > constant into regs for e500. This just extends that change to all > rs6000 targets, the simplest fix I found for PR52107, a problem I > discovered when looking at powerpc64-linux libgcc.
> It would also be possible to fix this in the rs6000.md movdi splitter > dealing with large constants, at least for this testcase when we know > we are dealing with a hard float reg. However, I think it's better > not to generate DImode fp values in the first place. Bootstrapped and > regression tested powerpc64-linux. OK to apply everywhere? > PR target/52107 > * config/rs6000/rs6000.c (rs6000_emit_move): Don't create DImode > subregs of TFmode. This fix is okay in trunk and 4.6. I am more reluctant to approve backporting it to GCC 4.5 at this late date. Thanks, David
