[Bug tree-optimization/48170] New: ICE: in hoist_code, at gcse.c:4524 with -fgcse --param max-hoist-depth={0,1}

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48170

           Summary: ICE: in hoist_code, at gcse.c:4524 with -fgcse --param
                    max-hoist-depth={0,1}
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: mkuvyrkov@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 23701
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23701
reduced testcase

Compiler output:
$ gcc -O -fgcse --param max-hoist-depth=1 testcase.c 
testcase.c: In function 'bar':
testcase.c:10:1: internal compiler error: in hoist_code, at gcse.c:4524
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The same happens for max-hoist-depth=1, though if I understand the
documentation correctly, 1 means "depth 1", 0 means "unlimited" (so maybe
"gcc_assert (MAX_HOIST_DEPTH > 1)" checks the value is not one of these
extrems?).

Tested revisions:
r171088 - crash
4.6 r170955 - crash
4.5 - doesn't know max-hoist-depth