GCC trunk gets an internal compiler error when building SPEC CPU2000 test
300.twolf with "-O2 -g -ffloat-store -fmodulo-sched" on powerpc-linux, as
demonstrated by this minimized testcase:

  extern int numerator, denom;

  double
  compute_and_combination (double states)
  {
    for (; numerator > denom; numerator--)
      states *= (double) numerator;
    return states;
   }

  elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -O2 -g -ffloat-store
-fmodulo-sched -c bug.c
  bug.c: In function ‘compute_and_combination’:
  bug.c:9:1: internal compiler error: in create_ddg_dep_no_link, at ddg.c:215
  Please submit a full bug report,
  with preprocessed source if appropriate.
  See <http://gcc.gnu.org/bugs.html> for instructions.

The failure started when var-tracking-assignments was enabled by default if
var-tracking was enabled; the test case passes with the additional option
-fno-var-tracking.


-- 
           Summary: var-tracking ICE for 300.twolf
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42244