[Bug debug/42631] New: "-fcompare-debug failure" with "-O1 -funroll-loops"

[zsojka at seznam dot cz]

Command line:
gcc -O1 -funroll-loops -fcompare-debug -c testcase.c

Tested revisions:
r155643 - crash (x86_64)
r155290 - crash (x86)
r153685 - crash (x86_64)

Output:
$ /mnt/svn/gcc-trunk/binary-153685-lto/bin/gcc -O1 -funroll-loops
-fcompare-debug -c testcase.c
gcc: testcase.c: -fcompare-debug failure

================== testcase.c ==================
void foo()
{
  unsigned k; /* doesn't crash with 'int' or when initialized */
  while (--k > 0);
}
================================================


-- 
           Summary: "-fcompare-debug failure" with "-O1 -funroll-loops"
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86(_64)-pc-linux-gnu
GCC target triplet: x86(_64)-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42631