[Bug target/58421] [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[Bug target/58421] [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.9.0

[Bug target/58421] New: [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

            Bug ID: 58421
           Summary: [4.9 regression] FAIL:
                    gcc.c-torture/compile/20051216-1.c  -O3
                    -fomit-frame-pointer  (internal compiler error)
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: rguenther at suse dot de
            Target: ia64-*-*

Broken by r202525.

$ gcc/xgcc -Bgcc/ -fno-diagnostics-show-caret -fdiagnostics-color=never -O3
-fomit-frame-pointer -w -c -o 20051216-1.o
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c: In function ‘test’:
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c:131:1: internal compiler
error: in add_insn_before_nobb, at emit-rtl.c:3836
0x40000000004ad1df add_insn_before_nobb
        ../../gcc/emit-rtl.c:3836
0x40000000004b886f add_insn_before(rtx_def*, rtx_def*, basic_block_def*)
        ../../gcc/emit-rtl.c:3898
0x40000000004b8b1f emit_pattern_before_noloc
        ../../gcc/emit-rtl.c:4179
0x40000000004b8c5f emit_pattern_before_setloc
        ../../gcc/emit-rtl.c:4586
0x4000000000952cff get_nop_from_pool(rtx_def*)
        ../../gcc/sel-sched-ir.c:1048
0x4000000000972ddf prepare_place_to_insert
        ../../gcc/sel-sched.c:5263
0x4000000000972ddf schedule_expr_on_boundary
        ../../gcc/sel-sched.c:5503
0x400000000097710f fill_insns
        ../../gcc/sel-sched.c:5646
0x400000000097710f schedule_on_fences
        ../../gcc/sel-sched.c:7423
0x400000000097710f sel_sched_region_2
        ../../gcc/sel-sched.c:7557
0x400000000097f64f sel_sched_region_1
        ../../gcc/sel-sched.c:7670
0x400000000097f64f sel_sched_region(int)
        ../../gcc/sel-sched.c:7697
0x40000000009810ef run_selective_scheduling()
        ../../gcc/sel-sched.c:7773
0x4000000000e70d2f ia64_reorg
        ../../gcc/config/ia64/ia64.c:9723
0x400000000090610f rest_of_handle_machine_reorg
        ../../gcc/reorg.c:3920
0x400000000090610f execute
        ../../gcc/reorg.c:3950
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From: "pch at laposte dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/55926] Internal compiler error with static volatile pointer
Date: Sat, 14 Sep 2013 10:57:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idU926

--- Comment #2 from pch at laposte dot net ---
I can neither reproduce the anomaly with 4.8.1.
Anyway I did not raise the issue because it was blocking for me. I had just
hope it could help to locate and fix an anomaly in gcc.

[Bug target/58421] [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-09-16
                 CC|rguenther at suse dot de           |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with a cross from x86_64 and -O3.

#1  0x00000000007c857e in add_insn_before_nobb (insn=0x7ffff6ed9b40, 
    before=0x7ffff6e8c708)
    at /space/rguenther/src/svn/trunk/gcc/emit-rtl.c:3836
3836      gcc_assert (!optimize || !INSN_DELETED_P (before));
(gdb) call debug_rtx (before)
(insn/v 361 1077 638 69 (set (reg/f:DI 37 r38 [orig:463 new_vp.2 ] [463])
        (unspec:DI [
                (mem/f/c:DI (reg/f:DI 47 r48 [760]) [6 new_vp+0 S8 A64])
            ] UNSPEC_LDS)) 20051216-1.c:103 23 {movdi_speculative}
     (nil))

#7  0x0000000000adaba2 in get_nop_from_pool (insn=0x7ffff6e8c708)
    at /space/rguenther/src/svn/trunk/gcc/sel-sched-ir.c:1048
1048      nop = emit_insn_before (nop, insn);

some unsharing is maybe missing?  Looks like a backend or scheduling bug
anyway.

[Bug target/58421] [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

Yukhin Kirill <kirill.yukhin at intel dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kirill.yukhin at intel dot com

--- Comment #2 from Yukhin Kirill <kirill.yukhin at intel dot com> ---
I cannot reproduce it on r204382, however it fails on r202525.

[Bug target/58421] [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed, no longer visible in gcc-testresults.