[Bug debug/68860] New: [6 regression] FAIL: gcc.dg/guality/pr36728-1.c -O3 -g line 16 arg1 == 1

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68860

            Bug ID: 68860
           Summary: [6 regression] FAIL: gcc.dg/guality/pr36728-1.c   -O3
                    -g  line 16 arg1 == 1
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: hubicka at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64-*-*, ia64-*-*

Breakpoint 1, foo (arg7=<optimized out>, arg6=<optimized out>, 
    arg5=<optimized out>, arg4=<optimized out>, arg3=<optimized out>, 
    arg2=<optimized out>, arg1=<optimized out>)
    at /usr/local/gcc/gcc-20151211/gcc/testsuite/gcc.dg/guality/pr36728-1.c:12
12        char *x = __builtin_alloca (arg7);
$1 = <optimized out>
$2 = 1
<optimized out> != 1
FAIL: gcc.dg/guality/pr36728-1.c   -O3 -g  line 16 arg1 == 1

15a1fce36358508909f2013fd6d07e0b9fcad97a is the first bad commit
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231540
138bc75d-0d04-0410-961f-82ee72b054a4