[Bug tree-optimization/23509] New: [4.0 regression] ICE with ivopts

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

Test case:

void block_diffs_C(int *ss, int *new, int ns, int *newp) {
    int x, y, s = 0;
    for (x = 0; x < 8; x++) {
        newp = new++;
        for (y = 0; y < 4; y++)
            s += *newp++;
        *ss = s;
    }
}

With GNU C version 4.1.0 20050810 (experimental) (alphaev68-unknown-linux-gnu)
at -O3, I get:
363.c: In function 'block_diffs_C':
363.c:1: internal compiler error: tree check: expected ssa_name, have error_mark
in verify_ssa, at tree-ssa.c:746
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

-fno-ivopts makes it go away.

-- 
           Summary: [4.0 regression] ICE with ivopts
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: falk at debian dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23509