[Bug rtl-optimization/69764] [5 Regression] ICE on x86_64-linux-gnu at -O0 (in decompose, at rtl.h:2107)

["schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69764

--- Comment #8 from Andreas Schwab <schwab@linux-m68k.org> ---
Not fixed on aarch64.

../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn1â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:7:12: warning: right shift count
is negative [-Wshift-count-negative]
   return a >> ~6; /* { dg-warning "right shift count is negative" } */
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn2â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:13:12: warning: right shift
count is negative [-Wshift-count-negative]
   return a >> ~6; /* { dg-warning "right shift count is negative" } */
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn3â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:19:12: warning: right shift
count is negative [-Wshift-count-negative]
   return a >> ~6; /* { dg-warning "right shift count is negative" } */
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn4â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:25:12: warning: right shift
count >= width of type [-Wshift-count-overflow]
   return a >> 0xff03; /* { dg-warning "right shift count >= width of type" }
*/
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn5â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:31:12: warning: right shift
count >= width of type [-Wshift-count-overflow]
   return a >> 0xff03; /* { dg-warning "right shift count >= width of type" }
*/
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn6â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:37:12: warning: right shift
count >= width of type [-Wshift-count-overflow]
   return a >> 0xff03; /* { dg-warning "right shift count >= width of type" }
*/
            ^~
../../gcc/gcc/testsuite/c-c++-common/pr69764.c: In function âfn1â:
../../gcc/gcc/testsuite/c-c++-common/pr69764.c:7:12: internal compiler error:
in decompose, at rtl.h:2107
   return a >> ~6; /* { dg-warning "right shift count is negative" } */
          ~~^~~~~
0x821de3 wi::int_traits<std::pair<rtx_def*, machine_mode> >::decompose(long*,
unsigned int, std::pair<rtx_def*, machine_mode> const&)
        ../../gcc/rtl.h:2105
0x821de3 wide_int_ref_storage<false>::wide_int_ref_storage<std::pair<rtx_def*,
machine_mode> >(std::pair<rtx_def*, machine_mode> const&)
        ../../gcc/wide-int.h:936
0x821de3 generic_wide_int<wide_int_ref_storage<false>
>::generic_wide_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*,
machine_mode> const&)
        ../../gcc/wide-int.h:714
0x821de3 convert_modes(machine_mode, machine_mode, rtx_def*, int)
        ../../gcc/expr.c:697
0xa480bf expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
        ../../gcc/optabs.c:1280
0x8076af expand_shift_1
        ../../gcc/expmed.c:2458
0x82f6f7 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        ../../gcc/expr.c:9029
0x720887 expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3642
0x720887 expand_gimple_stmt
        ../../gcc/cfgexpand.c:3702
0x725a83 expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5708
0x7284b7 execute
        ../../gcc/cfgexpand.c:6323