[Bug rtl-optimization/52417] New: [4.7 Regression] Infinite recursion in DSE/alias.c

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52417

             Bug #: 52417
           Summary: [4.7 Regression] Infinite recursion in DSE/alias.c
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: compile-time-hog
          Severity: major
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
            Target: avr


alias.c enters an infinite recurson for the following testcases from GCC
testsuite:

gcc.c-torture/compile/pr37669-2.c

for any compilation with -O* and without -fno-dse

Target: avr
Configured with: ../../gcc.gnu.org/trunk/configure --target=avr
--prefix=/local/gnu/install/gcc-4.7 --disable-nls --with-dwarf2
--enable-checking=yes,rtl target_alias=avr --enable-languages=c,c++
Thread model: single
gcc version 4.7.0 20120228 (experimental) (GCC)

GNU C (GCC) version 4.7.0 20120228 (experimental) (avr)
        compiled by GNU C version 4.3.2 [gcc-4_3-branch revision 141291], GMP
version 4.3.2, MPFR version 2.4.2, MPC version 0.8.2