[Bug rtl-optimization/87552] New: [9 regression] FAIL: gcc.c-torture/compile/20010102-1.c -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions (test for excess errors)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87552

            Bug ID: 87552
           Summary: [9 regression] FAIL:
                    gcc.c-torture/compile/20010102-1.c   -O3
                    -fomit-frame-pointer -funroll-loops -fpeel-loops
                    -ftracer -finline-functions  (test for excess errors)
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
            Blocks: 85458
  Target Milestone: ---
            Target: ia64-*-*

On ia64, priorities can become negative, thus the assertion in
sel_target_adjust_priority is wrong.  This only happens with -O3.

during RTL pass: mach
/usr/local/gcc/test/gcc/testsuite/gcc.c-torture/compile/20010102-1.c: In
function ‘_obstack_newchunk’:
/usr/local/gcc/test/gcc/testsuite/gcc.c-torture/compile/20010102-1.c:101:1:
internal compiler error: in sel_target_adjust_priority, at sel-sched.c:3333
0x40000000010bb68f sel_target_adjust_priority
        ../../gcc/sel-sched.c:3333
0x40000000010bb68f fill_vec_av_set
        ../../gcc/sel-sched.c:3727
0x40000000010bd45f fill_ready_list
        ../../gcc/sel-sched.c:4028
0x40000000010bd45f find_best_expr
        ../../gcc/sel-sched.c:4388
0x40000000010bd45f fill_insns
        ../../gcc/sel-sched.c:5549
0x40000000010c29cf schedule_on_fences
        ../../gcc/sel-sched.c:7366
0x40000000010c29cf sel_sched_region_2
        ../../gcc/sel-sched.c:7504
0x40000000010c510f sel_sched_region_1
        ../../gcc/sel-sched.c:7546
0x40000000010c700f sel_sched_region(int)
        ../../gcc/sel-sched.c:7647
0x40000000010c9def run_selective_scheduling()
        ../../gcc/sel-sched.c:7733
0x40000000019e473f ia64_reorg
        ../../gcc/config/ia64/ia64.c:9857
0x40000000010314cf execute
        ../../gcc/reorg.c:3984


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85458
[Bug 85458] FAIL: gcc.dg/pr83480.c (internal compiler error)