https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71506

            Bug ID: 71506
           Summary: ICE with libvpx with -floop-interchange:
                    isl_constraint.c:627: expecting integer value
           Product: gcc
           Version: 5.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andysem at mail dot ru
  Target Milestone: ---

Created attachment 38690
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38690&action=edit
Compiler output with -freport-bug

Compiling libvpx revision 181988d37273bd31708718a51e727ea1048d7c98 with
-floop-interchange results in ICE:

isl_constraint.c:627: expecting integer value
/home/lastique/src/xcoder/trunk/external/libvpx/libvpx/vp9/encoder/vp9_ethread.c:
In function ‘vp9_encode_tiles_mt’:
/home/lastique/src/xcoder/trunk/external/libvpx/libvpx/vp9/encoder/vp9_ethread.c:71:6:
internal compiler error: Aborted
 void vp9_encode_tiles_mt(VP9_COMP *cpi) {
      ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.

The ICE does not appear if compiling without -floop-interchange.

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