[Bug target/35839] [4.4 Regression] Altivec with the vectorizer causes an ICE in rs6000_check_sdmode

["janis at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from janis at gcc dot gnu dot org  2008-04-08 20:51 -------
My bootstrap on powerpc64-linux worked fine after the fix for 35620 went in;
see http://gcc.gnu.org/ml/gcc-testresults/2008-04/msg00415.html for revision
133952.  Since the following day, however, my bootstraps have failed building
64-bit libgfortran with an ICE for a libgfortran configure check:

conftest.F: In function 'main':
conftest.F:1: internal compiler error: in rs6000_output_function_epilogue, at
config/rs6000/rs6000.c:16855
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
configure:10346: $? = 1
configure: failed program was:
|       program main
| #ifndef __GNUC__
|        choke me
| #endif
| 
|       end

It also fails for just

      program main
      end

I'm doing a regression hunt to find out what caused that.

In the meantime, this has made it more difficult to test the patch to fix the
bug I introduced in rs6000_check_sdmode,
http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00584.html.  It seems like an
obvious fix but it hasn't yet been reviewed.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35839