[Bug middle-end/88032] New: [9 Regression] ICE in operand_subword_force, at emit-rtl.c:1793

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88032

            Bug ID: 88032
           Summary: [9 Regression] ICE in operand_subword_force, at
                    emit-rtl.c:1793
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

gcc.target/i386/pr80173.c started ICEing for me:

/home/abuild/rguenther/obj-slpcost-g/gcc/xgcc
-B/home/abuild/rguenther/obj-slpcost-g/gcc/
/space/rguenther/src/gcc-slpcost/gcc/testsuite/gcc.target/i386/pr80173.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -O2 -ffixed-xmm7 -S -o pr80173.s
during RTL pass: expand^M
/space/rguenther/src/gcc-slpcost/gcc/testsuite/gcc.target/i386/pr80173.c: In
function 'foo':^M
/space/rguenther/src/gcc-slpcost/gcc/testsuite/gcc.target/i386/pr80173.c:12:21:
internal compiler error: in operand_subword_force, at emit-rtl.c:1793^M
0xba6065 operand_subword_force(rtx_def*, poly_int<1u, unsigned long>,
machine_mode)^M
        /space/rguenther/src/gcc-slpcost/gcc/emit-rtl.c:1793^M
0xf8e1ea expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)^M
        /space/rguenther/src/gcc-slpcost/gcc/optabs.c:1388^M
0xbdc326 store_fixed_bit_field_1^M
        /space/rguenther/src/gcc-slpcost/gcc/expmed.c:1289^M
0xbdbdf7 store_fixed_bit_field^M
        /space/rguenther/src/gcc-slpcost/gcc/expmed.c:1207^M
0xbdb27a store_integral_bit_field^M
        /space/rguenther/src/gcc-slpcost/gcc/expmed.c:1067^M
0xbda3f1 store_bit_field_1^M