[Bug tree-optimization/81945] [8 Regression] ICE in operator[], at vec.h:749

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81945

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-08-23
                 CC|                            |amker at gcc dot gnu.org
   Target Milestone|---                         |8.0
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  More likely loop-distribution related:

t.c:19:3: internal compiler error: in operator[], at vec.h:749
   while (sa < 1);
   ^
0x97d148 vec<loop*, va_gc, vl_embed>::operator[](unsigned int)
        /space/rguenther/src/svn/early-lto-debug/gcc/vec.h:749
0x12632da get_loop
        /space/rguenther/src/svn/early-lto-debug/gcc/cfgloop.h:500
0x12644a9 vect_loop_dist_alias_call
        /space/rguenther/src/svn/early-lto-debug/gcc/tree-vectorizer.c:503
0x1264b2b vectorize_loops()
        /space/rguenther/src/svn/early-lto-debug/gcc/tree-vectorizer.c:676
0x11262ab execute
        /space/rguenther/src/svn/early-lto-debug/gcc/tree-ssa-loop.c:414
Please submit a full bug report,
with preprocessed source if appropriate.

so we outline the IFN call but we obviously need to remap the loop indices.