[Bug rtl-optimization/59133] New: [4.9 regression] ICE after r204219 on SPEC2006 435.gromacs.

[ysrumyan at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59133

            Bug ID: 59133
           Summary: [4.9 regression] ICE after r204219 on SPEC2006
                    435.gromacs.
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ysrumyan at gmail dot com

I attached a simple reproducer to compile with -march=core-avx2 -c -O3
-ffast-math options (-ffast-math is essential) and got the following ICE:

t.c: In function 'bar2':
t.c:39:1: internal compiler error: Max. number of generated reload insns per
insn is achieved (90)

 }
 ^
0x87548b lra_constraints(bool)
        /export/users/mstester/stability/svn/trunk/gcc/lra-constraints.c:3955
0x866c3c lra(_IO_FILE*)
        /export/users/mstester/stability/svn/trunk/gcc/lra.c:2303
0x829606 do_reload
        /export/users/mstester/stability/svn/trunk/gcc/ira.c:5407
0x829606 rest_of_handle_reload
        /export/users/mstester/stability/svn/trunk/gcc/ira.c:5536
0x829606 execute
        /export/users/mstester/stability/svn/trunk/gcc/ira.c:5565
Please submit a full bug report,