[Bug tree-optimization/89489] New: [9 Regression] ICE in gimple_duplicate_bb, at tree-cfg.c:6257

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89489

            Bug ID: 89489
           Summary: [9 Regression] ICE in gimple_duplicate_bb, at
                    tree-cfg.c:6257
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

gfortran-9.0.0-alpha20190224 snapshot (r269177) ICEs when compiling
gcc/testsuite/gfortran.dg/inline_sum_5.f90 w/ -O1 -floop-parallelize-all
-ftree-parallelize-loops=2:

% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190224 -O1
-floop-parallelize-all -ftree-parallelize-loops=2 -c
gcc/testsuite/gfortran.dg/inline_sum_5.f90
during GIMPLE pass: cunroll
f951: internal compiler error: in gimple_duplicate_bb, at tree-cfg.c:6257
0x64d066 gimple_duplicate_bb
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-cfg.c:6257
0x94d81e duplicate_block(basic_block_def*, edge_def*, basic_block_def*,
copy_bb_data*)
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/cfghooks.c:1085
0x94ee42 copy_bbs(basic_block_def**, unsigned int, basic_block_def**,
edge_def**, unsigned int, edge_def**, loop*, basic_block_def*, bool)
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/cfghooks.c:1353
0x95bebc duplicate_loop_to_header_edge(loop*, edge_def*, unsigned int,
simple_bitmap_def*, edge_def*, vec<edge_def*, va_heap, vl_ptr>*, int)
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/cfgloopmanip.c:1296
0xf00818 gimple_duplicate_loop_to_header_edge(loop*, edge_def*, unsigned int,
simple_bitmap_def*, edge_def*, vec<edge_def*, va_heap, vl_ptr>*, int)
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-manip.c:921
0xee4df0 try_unroll_loop_completely
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:907
0xee4df0 canonicalize_loop_induction_variables
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1250
0xee6fc0 tree_unroll_loops_completely_1
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1391
0xee6f2a tree_unroll_loops_completely_1
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1344
0xee6f2a tree_unroll_loops_completely_1
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1344
0xee7223 tree_unroll_loops_completely
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1437
0xee761c execute
       
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190224/work/gcc-9-20190224/gcc/tree-ssa-loop-ivcanon.c:1597

(While my target here is powerpc, the ICE is not target-specific.)