[Bug target/81492] internal compiler error: Segmentation fault (ia64 target with "-O1 -g" and __attribute__((optimize("O3"))))

["slyfox at inbox dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81492

--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
(In reply to Martin Liška from comment #1)
> Can't reproduce that with a cross compiler, can you please run --save-temps
> --verbose and execute 'cc1 ...' in GDB so that you can paste here a
> back-trace?

It fals here both on hative compiler and crosscompiler. Here is a backtrace:

[sf] ~/dev/bugs/gcc-ia64-crash:LANG=C gdb --args
/usr/libexec/gcc/ia64-unknown-linux-gnu/6.3.0/cc1 -fpreprocessed loops.i -quiet
-dumpbase loops.c -auxbase-strip loops.o -g -O1 -Wall -version -o loops.s
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Reading symbols from
/usr/libexec/gcc/ia64-unknown-linux-gnu/6.3.0/cc1...Reading symbols from
/usr/lib64/debug//usr/libexec/gcc/ia64-unknown-linux-gnu/6.3.0/cc1.debug...done.
done.
(gdb) run
Starting program: /usr/libexec/gcc/ia64-unknown-linux-gnu/6.3.0/cc1
-fpreprocessed loops.i -quiet -dumpbase loops.c -auxbase-strip loops.o -g -O1
-Wall -version -o loops.s
GNU C11 (Gentoo 6.3.0 p1.0) version 6.3.0 (ia64-unknown-linux-gnu)
        compiled by GNU C version 7.1.0, GMP version 6.1.2, MPFR version
3.1.3-p4, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Gentoo 6.3.0 p1.0) version 6.3.0 (ia64-unknown-linux-gnu)
        compiled by GNU C version 7.1.0, GMP version 6.1.2, MPFR version
3.1.3-p4, MPC version 1.0.2, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 6b42849eb9b759fbb6a6b5d3684c5a13

Program received signal SIGSEGV, Segmentation fault.
bb_note (bb=bb@entry=0x0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cfgrtl.c:669
669       note = BB_HEAD (bb);

(gdb) bt
#0  bb_note (bb=bb@entry=0x0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cfgrtl.c:669
#1  0x00000000008e221a in sel_bb_head (bb=0x0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched-ir.c:4536
#2  0x00000000008ee7c9 in moveup_expr_cached (expr=0x7fffffffca00,
insn=insn@entry=0x7fb762c90798,
inside_insn_group=inside_insn_group@entry=false)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:2531
#3  0x00000000008f163f in move_op_ascend (insn=0x7fb762c90798,
static_params=<optimized out>)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6151
#4  0x00000000008f3498 in code_motion_path_driver (insn=0x7fb762c90798,
insn@entry=0x7fb762c92a80, orig_ops=<optimized out>, orig_ops@entry=0x1668ff8, 
    path=0x16691b8, path@entry=0x0,
local_params_in=local_params_in@entry=0x7fffffffcae0,
static_params=static_params@entry=0x7fffffffcab0)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6648
#5  0x00000000008f3c32 in move_op (should_move=<synthetic pointer>,
c_expr=0x7fffffffca00, dest=<optimized out>, expr_vliw=0x1668f90,
orig_ops=0x1668ff8, 
    insn=0x7fb762c92a80) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6702
#6  move_exprs_to_boundary (bnd=<optimized out>, c_expr=0x7fffffffca00,
expr_seq=0x1668ff8, expr_vliw=0x1668f90)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5225
#7  schedule_expr_on_boundary (bnd=bnd@entry=0x1668ba0,
expr_vliw=expr_vliw@entry=0x1668f90, seqno=seqno@entry=-1)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5438
#8  0x00000000008f673a in fill_insns (fence=fence@entry=0x1668350, seqno=-1,
scheduled_insns_tailpp=scheduled_insns_tailpp@entry=0x7fffffffcce0)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5580
#9  0x00000000008f8e23 in schedule_on_fences
(scheduled_insns_tailpp=0x7fffffffcce0, max_seqno=1, fences=0x1668348)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:7356
#10 sel_sched_region_2 (orig_max_seqno=orig_max_seqno@entry=22) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:7494
#11 0x00000000008fa541 in sel_sched_region_1 () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:7536
#12 sel_sched_region (rgn=0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:7637
#13 0x00000000008faeac in run_selective_scheduling () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:7713
#14 0x0000000000b650b9 in ia64_reorg () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/config/ia64/ia64.c:9757
#15 0x00000000008c6a8a in (anonymous namespace)::pass_machine_reorg::execute
(this=<optimized out>)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/reorg.c:3952
#16 0x0000000000870673 in execute_one_pass (pass=pass@entry=0x14b53a0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/passes.c:2336
#17 0x0000000000870bd1 in execute_pass_list_1 (pass=0x14b53a0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/passes.c:2420
#18 0x0000000000870be3 in execute_pass_list_1 (pass=0x14b5220) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/passes.c:2421
#19 0x0000000000870be3 in execute_pass_list_1 (pass=0x14b3780) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/passes.c:2421
#20 0x0000000000870c25 in execute_pass_list (fn=<optimized out>,
pass=<optimized out>)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/passes.c:2431
#21 0x000000000060e103 in cgraph_node::expand (this=0x7fb762d692e0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cgraphunit.c:1982
#22 0x000000000060f449 in expand_all_functions () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cgraphunit.c:2118
#23 symbol_table::compile (this=this@entry=0x7fb762c8b000) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cgraphunit.c:2474
#24 0x0000000000611107 in symbol_table::compile (this=0x7fb762c8b000)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cgraphunit.c:2567
#25 symbol_table::finalize_compilation_unit (this=0x7fb762c8b000) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cgraphunit.c:2564
#26 0x000000000091eb0e in compile_file () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/toplev.c:488
#27 0x00000000004f668d in do_compile () at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/toplev.c:1986
#28 toplev::main (this=this@entry=0x7fffffffd076, argc=<optimized out>,
argc@entry=14, argv=<optimized out>, argv@entry=0x7fffffffd178)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/toplev.c:2094
#29 0x00000000004f87db in main (argc=14, argv=0x7fffffffd178) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/main.c:39

(gdb) bt full
#0  bb_note (bb=bb@entry=0x0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/cfgrtl.c:669
        note = <optimized out>
        __FUNCTION__ = "bb_note"
#1  0x00000000008e221a in sel_bb_head (bb=0x0) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched-ir.c:4536
        note = <optimized out>
        head = <optimized out>
#2  0x00000000008ee7c9 in moveup_expr_cached (expr=0x7fffffffca00,
insn=insn@entry=0x7fb762c90798,
inside_insn_group=inside_insn_group@entry=false)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:2531
        res = <optimized out>
        __FUNCTION__ = "moveup_expr_cached"
#3  0x00000000008f163f in move_op_ascend (insn=0x7fb762c90798,
static_params=<optimized out>)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6151
        res = <optimized out>
        sparams = <optimized out>
#4  0x00000000008f3498 in code_motion_path_driver (insn=0x7fb762c90798,
insn@entry=0x7fb762c92a80, orig_ops=<optimized out>, orig_ops@entry=0x1668ff8, 
    path=0x16691b8, path@entry=0x0,
local_params_in=local_params_in@entry=0x7fffffffcae0,
static_params=static_params@entry=0x7fffffffcab0)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6648
        expr = <optimized out>
        bb = 0x7fb762ca2dd0
        first_insn = 0x7fb762c92a80
        bb_tail = <optimized out>
        removed_last_insn = <optimized out>
        __FUNCTION__ = "code_motion_path_driver"
#5  0x00000000008f3c32 in move_op (should_move=<synthetic pointer>,
c_expr=0x7fffffffca00, dest=<optimized out>, expr_vliw=0x1668f90,
orig_ops=0x1668ff8, 
    insn=0x7fb762c92a80) at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:6702
        sparams = {dest = 0x0, c_expr = 0x7fffffffca00, uid = -1, failed_insn =
0x7fb762c90798, was_renamed = false}
        lparams = {e1 = 0x0, e2 = 0x0, c_expr_merged = 0x1668578, c_expr_local
= 0x1668e38, old_original_insns = 0x7fb762c92a80, removed_last_insn = 0}
        res = <optimized out>
#6  move_exprs_to_boundary (bnd=<optimized out>, c_expr=0x7fffffffca00,
expr_seq=0x1668ff8, expr_vliw=0x1668f90)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5225
        should_move = <optimized out>
        book_uid = <optimized out>
        n_bookkeeping_copies_before_moveop = 0
        bi = <optimized out>
#7  schedule_expr_on_boundary (bnd=bnd@entry=0x1668ba0,
expr_vliw=expr_vliw@entry=0x1668f90, seqno=seqno@entry=-1)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5438
        expr_seq = 0x1668ff8
        c_expr = 0x7fffffffca00
        insn = <optimized out>
        __FUNCTION__ = "schedule_expr_on_boundary"
#8  0x00000000008f673a in fill_insns (fence=fence@entry=0x1668350, seqno=-1,
scheduled_insns_tailpp=scheduled_insns_tailpp@entry=0x7fffffffcce0)
    at
/usr/src/debug/cross-ia64-unknown-linux-gnu/gcc-6.3.0/gcc-6.3.0/gcc/sel-sched.c:5580
        bnd = 0x1668ba0
        bndsp = 0x7fffffffcc08
        need_stall = <optimized out>