[Bug target/47725] New: [x32] error: unable to find a register to spill in class DIREG

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47725

           Summary: [x32] error: unable to find a register to spill in
                    class DIREG
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com
                CC: ubizjak@gmail.com


On x32 branch, I got

/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-x32/build-x86_64-linux/gcc/ -S -o u.s -mx32 -O2 -g
-fPIC    u.c
u.c: In function \u2018__frame_state_for\u2019:
u.c:14:1: error: unable to find a register to spill in class \u2018DIREG\u2019
u.c:14:1: error: this is the insn:
(insn 11 20 14 2 (parallel [
            (set (reg:DI 2 cx [64])
                (const_int 0 [0]))
            (set (reg/f:DI 0 ax [62])
                (plus:DI (ashift:DI (reg:DI 2 cx [64])
                        (const_int 3 [0x3]))
                    (reg/f:DI 1 dx [60])))
            (set (mem/s/c:BLK (reg/f:DI 1 dx [60]) [0 context+0 S72 A64])
                (const_int 0 [0]))
            (use (reg:DI 0 ax [63]))
            (use (reg:DI 2 cx [64]))
        ]) u.c:11 874 {*rep_stosdi_rex64}
     (expr_list:REG_DEAD (reg:DI 0 ax [63])
        (expr_list:REG_UNUSED (reg:DI 2 cx [64])
            (expr_list:REG_UNUSED (reg/f:DI 0 ax [62])
                (nil)))))
u.c:14:1: internal compiler error: in spill_failure, at reload1.c:2105
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [u.s] Error 1
[hjl@gnu-6 ilp32-14]$