[Bug middle-end/79988] New: [7 Regression][CHKP] ICE in tree check: accessed operand 5 of call_expr with 4 operands in ix86_expand_builtin, at config/i386/i386.c:36851

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79988

            Bug ID: 79988
           Summary: [7 Regression][CHKP] ICE in tree check: accessed
                    operand 5 of call_expr with 4 operands in
                    ix86_expand_builtin, at config/i386/i386.c:36851
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Starting from r238709, we ICE on:

$ timeout 3 gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr79723.c
-fcheck-pointer-bounds -mmpx
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr79723.c: In
function ‘memset_pattern_seg_gs.chkp’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/pr79723.c:7:10:
internal compiler error: Segmentation fault
     s[i] = 0;
     ~~~~~^~~
0x9fc2ef crash_signal
        .././../gcc/toplev.c:337
0x77e7f0 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
        .././../gcc/expr.c:8064
0xc9fb4a expand_normal
        .././../gcc/expr.h:282
0xc9fb4a ix86_expand_builtin
        .././../gcc/config/i386/i386.c:36854
0x67eea9 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
        .././../gcc/builtins.c:6362
0x77d28e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        .././../gcc/expr.c:10822
0x69b0ee expand_expr
        .././../gcc/expr.h:276
0x69b0ee expand_call_stmt
        .././../gcc/cfgexpand.c:2658
0x69b0ee expand_gimple_stmt_1
        .././../gcc/cfgexpand.c:3571
0x69b0ee expand_gimple_stmt
        .././../gcc/cfgexpand.c:3737
0x69bf8f expand_gimple_basic_block
        .././../gcc/cfgexpand.c:5744
0x6a0546 execute
        .././../gcc/cfgexpand.c:6357