[Bug rtl-optimization/55154] New: [4.8 Regression] ICE: in curr_insn_transform, at lra-constraints.c:2702 with custom flags

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55154

             Bug #: 55154
           Summary: [4.8 Regression] ICE: in curr_insn_transform, at
                    lra-constraints.c:2702 with custom flags
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 28584
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28584
preprocessed source

Compiler output:
$ gcc -O2 -mcx16 -fpic -mcmodel=large -fno-split-wide-types pr46254.i 
/mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/pr46254.c: In function 'test':
/mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/pr46254.c:11:1: error: unable
to generate reloads for:
 }
 ^
(insn 10 14 0 2 (parallel [
            (set (subreg:DI (reg:TI 65) 0)
                (unspec_volatile:DI [
                        (mem/v:TI (reg/f:DI 62) [-1 S16 A128])
                        (mem/c:DI (reg/f:DI 62) [2 i+0 S8 A128])
                        (mem/c:DI (plus:DI (reg/f:DI 62)
                                (const_int 8 [0x8])) [2 i+8 S8 A64])
                        (mem/c:DI (reg/f:DI 62) [2 i+0 S8 A128])
                        (mem/c:DI (plus:DI (reg/f:DI 62)
                                (const_int 8 [0x8])) [2 i+8 S8 A64])
                        (const_int 5 [0x5])
                    ] UNSPECV_CMPXCHG))
            (set (subreg:DI (reg:TI 65) 8)
                (unspec_volatile:DI [
                        (const_int 0 [0])
                    ] UNSPECV_CMPXCHG))
            (set (mem/v:TI (reg/f:DI 62) [-1 S16 A128])
                (unspec_volatile:TI [
                        (const_int 0 [0])
                    ] UNSPECV_CMPXCHG))
            (set (reg:CCZ 17 flags)
                (unspec_volatile:CCZ [
                        (const_int 0 [0])
                    ] UNSPECV_CMPXCHG))
            (clobber (reg:DI 67))
        ]) /mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/pr46254.c:10 2063
{atomic_compare_and_swapti_doubleword}
     (expr_list:REG_UNUSED (reg:DI 67)
        (expr_list:REG_DEAD (reg/f:DI 62)
            (expr_list:REG_DEAD (reg:TI 60 [ i.1 ])
                (expr_list:REG_UNUSED (reg:TI 65)
                    (expr_list:REG_UNUSED (reg:TI 65)
                        (expr_list:REG_UNUSED (reg:CCZ 17 flags)
                            (nil))))))))
/mnt/svn/gcc-trunk/gcc/testsuite/gcc.target/i386/pr46254.c:11:1: internal
compiler error: in curr_insn_transform, at lra-constraints.c:2702
0x997d2a _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /mnt/svn/gcc-trunk/gcc/rtl-error.c:110
0x8dd7b9 curr_insn_transform
        /mnt/svn/gcc-trunk/gcc/lra-constraints.c:2702
0x8ddf34 lra_constraints(bool)
        /mnt/svn/gcc-trunk/gcc/lra-constraints.c:3404
0x8cdd1c lra(_IO_FILE*)
        /mnt/svn/gcc-trunk/gcc/lra.c:2281
0x883d66 do_reload
        /mnt/svn/gcc-trunk/gcc/ira.c:4624
0x883d66 rest_of_handle_reload
        /mnt/svn/gcc-trunk/gcc/ira.c:4736
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