[Bug tree-optimization/69255] New: ICE (segfault) on x86_64-linux-gnu in "emit_move_insn"

[helloqirun at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69255

            Bug ID: 69255
           Summary: ICE (segfault) on x86_64-linux-gnu in "emit_move_insn"
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: helloqirun at gmail dot com
  Target Milestone: ---

The following code causes an ICE when compiled with the current gcc trunk on
x86_64-linux-gnu in 64-bit mode.


$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 6.0.0 20160112 (experimental) [trunk revision 232269] (GCC) 




$ gcc-trunk -c abc.c
abc.c: In function ‘fun1’:
abc.c:7:40: warning: passing argument 2 of ‘__builtin_ia32_gather3siv4di’ from
incompatible pointer type [-Wincompatible-pointer-types]
   a = __builtin_ia32_gather3siv4di (a, fun1, b, 1, 1);
                                        ^~~~

abc.c:7:40: note: expected ‘const long long int *’ but argument is of type ‘int
(*)()’
abc.c:7:7: warning: AVX vector return without AVX enabled changes the ABI
[-Wpsabi]
   a = __builtin_ia32_gather3siv4di (a, fun1, b, 1, 1);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

abc.c:7:7: error: ‘__builtin_ia32_gather3siv4di’ needs isa option -m32
-mavx512vl
   a = __builtin_ia32_gather3siv4di (a, fun1, b, 1, 1);
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

abc.c:7:7: internal compiler error: in emit_move_insn, at expr.c:3546
0x84446f emit_move_insn(rtx_def*, rtx_def*)
        ../../gcc/gcc/expr.c:3545
0x84ae0d store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
        ../../gcc/gcc/expr.c:5583
0x84c410 expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/gcc/expr.c:5175
0x74058a expand_call_stmt
        ../../gcc/gcc/cfgexpand.c:2646
0x74058a expand_gimple_stmt_1
        ../../gcc/gcc/cfgexpand.c:3536
0x74058a expand_gimple_stmt
        ../../gcc/gcc/cfgexpand.c:3702
0x743624 expand_gimple_basic_block
        ../../gcc/gcc/cfgexpand.c:5708
0x7485f6 execute
        ../../gcc/gcc/cfgexpand.c:6323
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


----------------
$ cat abc.c
#pragma GCC target "avx512vl"
#pragma GCC target ""
__attribute__ ((__vector_size__ (4 * sizeof (long))))  long long a;
__attribute__ ((__vector_size__ (2 * sizeof (long)))) int b;
int fun1 ()
{
  a = __builtin_ia32_gather3siv4di (a, fun1, b, 1, 1);
}