[Bug c/53966] New: procmail build deadloop on _autotst & -O3

[mahatma at eu dot by]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53966

             Bug #: 53966
           Summary: procmail build deadloop on _autotst & -O3
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mahatma@eu.by


Building procmail 3.22 with -O3 or "-O2 -fipa-cp-clone" cause deadloop on
_autotest. But - subproblem - "-O3 -fno-ipa-cp-clone" cause deadloop too.

To reproduce:
cd procmail-3.22/src
&
1) make CFLAGS=-O3
2) make CFLAGS="-O2 -fipa-cp-clone"
3) make CFLAGS="-O3 -fno-ipa-cp-clone"
4) make CFLAGS=-O2
- only (4) is good.