[Bug tree-optimization/55857] New: [4.8 Regression] ICE: verify_ssa failed

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55857

             Bug #: 55857
           Summary: [4.8 Regression] ICE: verify_ssa failed
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rguenth@gcc.gnu.org
            Target: powerpc*-*-*


Created attachment 29076
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29076
preprocessed source

Reproduced with a cross from x86_64:

./cc1 -quiet lpc.i -fpreprocessed  -quiet -maltivec -O -ftree-vectorize
lpc.c: In function 'FLAC__lpc_compute_residual_from_qlp_coefficients':
lpc.c:266:6: error: PHI argument is missing for edge 58->56
for PHI node
vect_var_.321_1054 = PHI <(58), vect_var_.315_1052(114)>
lpc.c:266:6: internal compiler error: verify_ssa failed
0xc89f71 verify_ssa(bool)
        /space/rguenther/src/svn/trunk/gcc/tree-ssa.c:1050
0xbf6163 verify_loop_closed_ssa(bool)
        /space/rguenther/src/svn/trunk/gcc/tree-ssa-loop-manip.c:591
0xbf684b gimple_duplicate_loop_to_header_edge(loop*, edge_def*, unsigned int,
simple_bitmap_def*, edge_def*, vec<edge_def*, va_heap, vl_ptr>*, int)
        /space/rguenther/src/svn/trunk/gcc/tree-ssa-loop-manip.c:762
0x6da91d cfg_hook_duplicate_loop_to_header_edge(loop*, edge_def*, unsigned int,
simple_bitmap_def*, edge_def*, vec<edge_def*, va_heap, vl_ptr>*, int)
        /space/rguenther/src/svn/trunk/gcc/cfghooks.c:1183
0x6e6651 loop_version(loop*, void*, basic_block_def**, unsigned int, unsigned
int, unsigned int, bool)
        /space/rguenther/src/svn/trunk/gcc/cfgloopmanip.c:1685
0xcd31d9 vect_loop_versioning(_loop_vec_info*, unsigned int, bool)
        /space/rguenther/src/svn/trunk/gcc/tree-vect-loop-manip.c:2581
0xccae16 vect_transform_loop(_loop_vec_info*)
        /space/rguenther/src/svn/trunk/gcc/tree-vect-loop.c:5483
0xcddad4 vectorize_loops()
        /space/rguenther/src/svn/trunk/gcc/tree-vectorizer.c:124
0xc0425d tree_vectorize
        /space/rguenther/src/svn/trunk/gcc/tree-ssa-loop.c:220
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Reducing.