[Bug tree-optimization/42917] New: [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear

[zsojka at seznam dot cz]

Command line:
gcc -O1 -ftree-loop-linear -fcompare-debug -c testcase.c
(fails at all -O1, -O2 and -O3 levels)

Tested revisions:
r156367 - crash
r155833 - crash
r154830 - crash
r153685 - crash

Output:
$ /mnt/svn/gcc-trunk/binary-156367-lto/bin/gcc -O1 -ftree-loop-linear
testcase.c -fcompare-debug
gcc: testcase.c: -fcompare-debug failure (length)

There is actually different code generated with -g, the outer loop isn't
removed. 4.4.2 generates the same code for both cases.


-- 
           Summary: [4.5 Regression] "-fcompare-debug failure" with -ftree-
                    loop-linear
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        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=42917