[Bug target/64513] New: [4.8/4.9/5 Regression] ICE: in maybe_record_trace_start, at dwarf2cfi.c:2231 with -mstack-arg-probe

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64513

            Bug ID: 64513
           Summary: [4.8/4.9/5 Regression] ICE: in
                    maybe_record_trace_start, at dwarf2cfi.c:2231 with
                    -mstack-arg-probe
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 34389
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34389&action=edit
reduced testcase

Compiler output:
$ gcc -O2 -mstack-arg-probe testcase.c         
testcase.c: In function 'bar':
testcase.c:19:1: internal compiler error: in maybe_record_trace_start, at
dwarf2cfi.c:2302
 }
 ^
0x879e5c maybe_record_trace_start
        /mnt/svn/gcc-trunk/gcc/dwarf2cfi.c:2302
0x87aa53 scan_trace
        /mnt/svn/gcc-trunk/gcc/dwarf2cfi.c:2480
0x87c20a create_cfi_notes
        /mnt/svn/gcc-trunk/gcc/dwarf2cfi.c:2634
0x87c20a execute_dwarf2_frame
        /mnt/svn/gcc-trunk/gcc/dwarf2cfi.c:2990
0x87c20a execute
        /mnt/svn/gcc-trunk/gcc/dwarf2cfi.c:3470
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.

Tested revisions:
r219255 - ICE
4_9 r219040 - ICE
4_8 r219093 - ICE
4_7 r211571 - ICE
4_6 r197894 - OK