[Bug tree-optimization/79898] New: ICE in const_binop, at fold-const.c:1554 on ARM target

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79898

            Bug ID: 79898
           Summary: ICE in const_binop, at fold-const.c:1554 on ARM target
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---
            Target: arm-linux-gnueabi

Following ICEs on ARM target (with cross-compiler):

$ arm-linux-gnueabi-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fixed-point/loop-index.c
-Ofast
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fixed-point/loop-index.c: In
function ‘main’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fixed-point/loop-index.c:55:1:
internal compiler error: in const_binop, at fold-const.c:1554
 main ()
 ^~~~
0x8907da const_binop(tree_code, tree_node*, tree_node*, tree_node*)
        .././../gcc/fold-const.c:1553
0xee5cb8 gimple_resimplify2(gimple**, code_helper*, tree_node*, tree_node**,
tree_node* (*)(tree_node*))
        .././../gcc/gimple-match-head.c:132
0xd440dd vn_nary_build_or_lookup_1
        .././../gcc/tree-ssa-sccvn.c:1676
0xd44345 vn_nary_simplify(vn_nary_op_s*)
        .././../gcc/tree-ssa-sccvn.c:1771
0xd1db90 fully_constant_expression
        .././../gcc/tree-ssa-pre.c:1216
0xd22f25 phi_translate_1
        .././../gcc/tree-ssa-pre.c:1462
0xd20d23 phi_translate
        .././../gcc/tree-ssa-pre.c:1742
0xd20ea5 phi_translate_set
        .././../gcc/tree-ssa-pre.c:1780
0xd21d7d compute_antic_aux
        .././../gcc/tree-ssa-pre.c:2116
0xd21d7d compute_antic
        .././../gcc/tree-ssa-pre.c:2403
0xd250c0 execute
        .././../gcc/tree-ssa-pre.c:5094