[Bug middle-end/71284] New: [7 Regression] internal compiler error: Segmentation fault

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71284

            Bug ID: 71284
           Summary: [7 Regression] internal compiler error: Segmentation
                    fault
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: kuganv at linaro dot org
  Target Milestone: ---

On x86-64, r236564 caused:

gfortran -c -o material_11.o   -DSPEC_CPU2000_LP64         -O2 -ffast-math  
material_11.f90
internal compiler error: Segmentation fault
0xbda9ff crash_signal
        ../../src-trunk/gcc/toplev.c:333
0x953ab9 bb_seq_addr
        ../../src-trunk/gcc/gimple.h:1655
0x953ab9 gsi_start_bb
        ../../src-trunk/gcc/gimple-iterator.h:129
0x953ab9 gsi_for_stmt(gimple*)
        ../../src-trunk/gcc/gimple-iterator.c:617
0xd7444a insert_stmt_after
        ../../src-trunk/gcc/tree-ssa-reassoc.c:1323
0xd757ba build_and_add_sum
        ../../src-trunk/gcc/tree-ssa-reassoc.c:1392
0xd7796e rewrite_expr_tree_parallel
        ../../src-trunk/gcc/tree-ssa-reassoc.c:4128
0xd7f812 reassociate_bb
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5339
0xd7f4d7 reassociate_bb
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5391
0xd7f4d7 reassociate_bb
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5391
0xd7f4d7 reassociate_bb
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5391
0xd8242a do_reassoc
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5505
0xd8242a execute_reassoc
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5592
0xd8242a execute
        ../../src-trunk/gcc/tree-ssa-reassoc.c:5631
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
specmake[3]: *** [material_11.o] Error 1

when compiling 191.fma3d in SPEC CPU 2000.