[Bug middle-end/47566] New: ICE in vn_reference_lookup

[Joost.VandeVondele at pci dot uzh.ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47566

           Summary: ICE in vn_reference_lookup
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: Joost.VandeVondele@pci.uzh.ch


current trunk fails with ICE compiling with LTO cp2k.

/data03/vondele/gnu/gcc_trunk/install/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto1
-march=amdfam10 -mcx16 -msahf -mpopcnt -mabm --param l1-cache-size=64 --param
l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 -quiet -dumpdir
/data03/vondele/cp2k_gcc/cp2k/makefiles/../exe/gfortran-test24/ -dumpbase
cp2k.sopt.ltrans1 -auxbase-strip cp2k.sopt.ltrans1.ltrans.o -O3 -version
-ffree-form -funroll-loops -ffast-math -fuse-linker-plugin -fltrans
cp2k.sopt.ltrans1.o -o cp2k.sopt.ltrans1.s -v

GNU GIMPLE (GCC) version 4.6.0 20110201 (experimental) [trunk revision 169466]
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20110201 (experimental) [trunk revision
169466], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU GIMPLE (GCC) version 4.6.0 20110201 (experimental) [trunk revision 169466]
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.6.0 20110201 (experimental) [trunk revision
169466], GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
In file included from :520:0:
/data03/vondele/cp2k_gcc/cp2k/makefiles/../src/fft_tools.F: In function
‘fft3d_pb’:
/data03/vondele/cp2k_gcc/cp2k/makefiles/../src/fft_tools.F:994:0: internal
compiler error: Segmentation fault

in gdb I get

Program received signal SIGSEGV, Segmentation fault.
0x000000000079583b in vn_reference_lookup (op=0x7fffef4a4460,
vuse=0x7ffff532eb40, kind=VN_WALK, vnresult=0x0) at
../../gcc/gcc/tree-ssa-sccvn.c:1543
1543      vr1.vuse = vuse ? SSA_VAL (vuse) : NULL_TREE;
(gdb) bt
#0  0x000000000079583b in vn_reference_lookup (op=0x7fffef4a4460,
vuse=0x7ffff532eb40, kind=VN_WALK, vnresult=0x0) at
../../gcc/gcc/tree-ssa-sccvn.c:1543
#1  0x0000000000787a0c in eliminate () at ../../gcc/gcc/tree-ssa-pre.c:4331
#2  0x000000000078a2a5 in execute_pre (do_fre=0 '\000') at
../../gcc/gcc/tree-ssa-pre.c:4901
#3  execute_pre (do_fre=0 '\000') at ../../gcc/gcc/tree-ssa-pre.c:4845
#4  0x000000000064fdb9 in execute_one_pass (pass=0x10968c0) at
../../gcc/gcc/passes.c:1561
#5  0x0000000000650065 in execute_pass_list (pass=0x10968c0) at
../../gcc/gcc/passes.c:1616
#6  0x0000000000650077 in execute_pass_list (pass=0x10957e0) at
../../gcc/gcc/passes.c:1617
#7  0x000000000071b481 in tree_rest_of_compilation (fndecl=0x7ffff5c2ff00) at
../../gcc/gcc/tree-optimize.c:422
#8  0x000000000085884f in cgraph_expand_function (node=0x7ffff54599a0) at
../../gcc/gcc/cgraphunit.c:1563
#9  0x000000000085a46a in cgraph_expand_all_functions () at
../../gcc/gcc/cgraphunit.c:1622
#10 cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:1882
#11 0x00000000004b9fdf in lto_main () at ../../gcc/gcc/lto/lto.c:2457

details of gfortran -v:

gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/data03/vondele/gnu/gcc_trunk/install/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure
--prefix=/data03/vondele/gnu/gcc_trunk/install --enable-languages=c,c++,fortran
--disable-multilib --enable-plugins --enable-cloog-backend=isl
--with-ppl=/data03/vondele/gnu/ppl-0.11/install
--with-cloog=/data03/vondele/gnu/cloog-0.16.1/install/
--with-libelf=/data03/vondele/gnu/libelf-0.8.13/install --enable-gold
--enable-checking=release
Thread model: posix
gcc version 4.6.0 20110201 (experimental) [trunk revision 169466] (GCC)