[Bug tree-optimization/42284] New: failing tree check in graphite-sese-to-poly.c for 164.gzip

[janis at gcc dot gnu dot org]

GCC trunk gets an internal compiler error when building SPEC CPU2000 test
164.gzip with "-O2 -floop-interchange" on powerpc-linux, as demonstrated by a
minimized testcase that I'll attach to this PR.

elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -c -O2 -floop-interchange
bug.c
bug.c: In function ‘inflate_fixed’:
bug.c:56:1: internal compiler error: tree check: expected ssa_name, have
integer_cst in detect_commutative_reduction, at graphite-sese-to-poly.c:2654
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

A Graphite-enabled trunk build is broken during the 19-hour range from r150250
to 150300.  The test passes with the build just before that range and fails
with r150301, the first revision that builds after a merge from the Graphite
branch.


-- 
           Summary: failing tree check in  graphite-sese-to-poly.c for
                    164.gzip
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42284