[Bug other/67698] New: internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2297

[Bug other/67698] New: internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2297

[hjl.tools at gmail dot com]

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67698

            Bug ID: 67698
           Summary: internal compiler error: in maybe_record_trace_start,
                    at dwarf2cfi.c:2297
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: julia.koval at intel dot com
            Blocks: 67552
  Target Milestone: ---

On hjl/interrupt/master branch, I got

[hjl@gnu-6 interrupt-2]$ cat bar.c
extern int check_int (int *i, void *, int align);
typedef int aligned __attribute__((aligned(64)));
typedef unsigned int uword_t __attribute__ ((mode (__word__)));

__attribute__((interrupt))
void
foo (void *frame, uword_t error_code)
{
  aligned j;
  if (check_int (frame, &j, __alignof__(j)))
    __builtin_abort ();
}
[hjl@gnu-6 interrupt-2]$ /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -S -o bar.s bar.c 
bar.c: In function ‘foo’:
bar.c:12:1: internal compiler error: in maybe_record_trace_start, at
dwarf2cfi.c:2297
 }
 ^
0x946051 maybe_record_trace_start
        /export/gnu/import/git/sources/gcc/gcc/dwarf2cfi.c:2297
0x94671f scan_trace
        /export/gnu/import/git/sources/gcc/gcc/dwarf2cfi.c:2475
0x946cc9 create_cfi_notes
        /export/gnu/import/git/sources/gcc/gcc/dwarf2cfi.c:2629
0x9477db execute_dwarf2_frame
        /export/gnu/import/git/sources/gcc/gcc/dwarf2cfi.c:2987
0x948536 execute
        /export/gnu/import/git/sources/gcc/gcc/dwarf2cfi.c:3467
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-6 interrupt-2]$


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67552
[Bug 67552] [meta] x86 interrupt attribute
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Subject: [Bug c++/67699] New: Segfault compiling a constexpr array with -fmerge-all-constants -flto
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg699

            Bug ID: 67699
           Summary: Segfault compiling a constexpr array with
                    -fmerge-all-constants -flto
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gcc at norgg dot org
  Target Milestone: ---

Created attachment 36380
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id6380&actioníit
Minimal testcase

Minimal test case attached, run with: g++ -std=c++11 -fmerge-all-constants
-flto gcc_crash.cpp -o gcc_crash.o

We've found this is repeatable in:

g++ (Ubuntu 4.9.2-0ubuntu1~14.04) 4.9.2
g++ (Ubuntu 5.1.0-0ubuntu11~14.04.1) 5.1.0
g++ 5.2.1 20150825 (Ubuntu 5.2.1-15ubuntu5)
g++ (Debian 5.2.1-17) 5.2.1 20150911
g++.exe (i686-posix-dwarf-rev0, Built by MinGW-W64 project) 5.1.0

[Bug other/67698] internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2297

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67698

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-09-24
   Target Milestone|---                         |6.0
     Ever confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It is triggered by -freorder-blocks-and-partition.

[Bug other/67698] internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2297

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67698

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
I checked a fix:

commit c6d616512b2bc429f43c147dcd5cb0c27af8aa47
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Sep 24 05:23:37 2015 -0700

    Remove interrupt_return

    We must pass UNSPEC_INTERRUPT_RETURN parallel pattern directly to
    emit_jump_insn to emit IRET instruction.  We don't need to mark
    BP and SP registers used by interrupt return since it is emitted
    via emit_jump_insn now.

into hjl/interrupt/master branch.

[Bug other/67698] internal compiler error: in maybe_record_trace_start, at dwarf2cfi.c:2297

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67698

H.J. Lu <hjl.tools at gmail dot com> changed:

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

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed on hjl/interrupt/master branch.