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From: "dtaubert at atmosic dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/94172] New: [arm-none-eabi] ICE in
 expand_debug_locations, at cfgexpand.c:5403
Date: Sat, 14 Mar 2020 03:27:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94172

            Bug ID: 94172
           Summary: [arm-none-eabi] ICE in expand_debug_locations, at
                    cfgexpand.c:5403
           Product: gcc
           Version: 8.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dtaubert at atmosic dot com
  Target Milestone: ---

Created attachment 48032
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D48032&action=3Dedit
gcc -v output

extern enum my_enum_type extern_enum;
extern void bar(int a);

enum my_enum_type {
    my_entry
};

void foo(int a)
{
    int local_enum =3D extern_enum;

    if (a) {
        __asm volatile ("bkpt 0");
        local_enum =3D 0;
    }
    bar(local_enum);
}

arm/gcc-arm-none-eabi-8-2019-q3-update/bin/arm-none-eabi-gcc -o foo.o -c
-mcpu=3Dcortex-m0 -mthumb -Os -g3 foo.c
during RTL pass: expand
foo.c: In function 'foo':
foo.c:8:6: internal compiler error: in expand_debug_locations, at
cfgexpand.c:5403
 void foo(int a)
      ^~~


Also seen with releases/gcc-9.2.0 from git://gcc.gnu.org/git/gcc.git
during RTL pass: expand
foo.c: In function ?foo?:
foo.c:8:6: internal compiler error: in expand_debug_locations, at
cfgexpand.c:5460
    8 | void foo(int a)
      |      ^~~
0x67cb6b expand_debug_locations
        ../../gcc/cfgexpand.c:5456
0x67cb6b execute
        ../../gcc/cfgexpand.c:6516

            gcc_assert (mode =3D=3D GET_MODE (val)
                        || (GET_MODE (val) =3D=3D VOIDmode
                            && (CONST_SCALAR_INT_P (val)
                                || GET_CODE (val) =3D=3D CONST_FIXED
                                || GET_CODE (val) =3D=3D LABEL_REF)));=