[Bug tree-optimization/22471] New: corrupted profile info with -O3 -fprofile-use

["janis at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Several of the SPEC CPU2000 tests currently fail on powerpc64-linux
with -fprofile-generate/-fprofile-use plus -O3.  Some of the failures
start recently and appear to be intermittent.  Failures for 176.gcc
with either -m32 or -m64 and 175.vpr with -m64 start with this patch
from dberlin (Remove var_ann->uid) and seem to fail consistently since
it was added:
                                                                                
  http://gcc.gnu.org/ml/gcc-cvs/2005-06/msg01108.html
                                                                                
Error messages are "corrupted profile info: number of executions for
edge xxx-yyy thought to be zzz" or "number of iterations for basic
block xxx thought to be yyy" or "coverage mismatch for function 'xxx'
while reading counter 'arcs'".
                                                                                
I don't have a minimized test case but can try to create one.

-- 
           Summary: corrupted profile info with -O3 -fprofile-use
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
                CC: dberlin at gcc dot gnu dot org,gcc-bugs at gcc dot gnu
                    dot org
GCC target triplet: powerpc64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22471