[Bug rtl-optimization/88033] New: ICE on valid code at -O2 and -O3 on x86-64-linux-gnu: in remove_some_program_points_and_update_live_ranges, at lra-lives.c:1179

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88033

            Bug ID: 88033
           Summary: ICE on valid code at -O2 and -O3 on x86-64-linux-gnu:
                    in remove_some_program_points_and_update_live_ranges,
                    at lra-lives.c:1179
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 9.0.0 20181115 (experimental) [trunk revision 266173] (GCC)
$
$ gcctk -Os small.c
$
$ gcctk -O2 small.c
during RTL pass: reload
small.c: In function ‘main’:
small.c:17:1: internal compiler error: in
remove_some_program_points_and_update_live_ranges, at lra-lives.c:1179
   17 | }
      | ^
0xc1e8ef remove_some_program_points_and_update_live_ranges
        ../../gcc-source-trunk/gcc/lra-lives.c:1179
0xc1e8ef compress_live_ranges
        ../../gcc-source-trunk/gcc/lra-lives.c:1308
0xc1e8ef lra_create_live_ranges_1
        ../../gcc-source-trunk/gcc/lra-lives.c:1461
0xc1eb5f lra_create_live_ranges(bool, bool)
        ../../gcc-source-trunk/gcc/lra-lives.c:1473
0xbfffe0 lra(_IO_FILE*)
        ../../gcc-source-trunk/gcc/lra.c:2483
0xbb27f9 do_reload
        ../../gcc-source-trunk/gcc/ira.c:5469
0xbb27f9 execute
        ../../gcc-source-trunk/gcc/ira.c:5653
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$


-----------------------------------------------


long a, b, c;

long f (long e)
{ 
  return (e & ~3000000000) < 0 ? a : a - e;
}

int main ()
{ 
  if (!c)
    return 0;
  int g;
  b = f (g);
  while (1)
    ;
  return 0;
}