[Bug tree-optimization/18241] New: linux kernel loop gets miscompiled

[ak at muc dot de]

(just guessing on the component) 

I've been trying to boot a 4.0-20041030 compiled x86_64-linux-kernel. First 
it exposed a missing -fno-strict-aliasing (now fixed) but then it crashes
during disk accesses. The problem goes away when one function from the
radix tree library is compiled with -O0 instead of -O2

I unfortunately don't have a runnable test case yet, but I can give 
compiler input that shows the problem.

-- 
           Summary: linux kernel loop gets miscompiled
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ak at muc dot de
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: x86_64-linux
GCC target triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18241