[Bug c/24661] New: unable to find a register to spill in class NO_REGS on ia64

["vapier at gentoo dot org" <gcc-bugzilla at gcc dot gnu dot org>]

trying to build quake3 on ia64 ... reduced test case looks like this:

$ gcc -O2 -c sym.c
sym.c: In function `vtoa':
sym.c:28: error: unable to find a register to spill in class `FR_REGS'
sym.c:28: error: this is the insn:
(insn 12 3 13 0 (set (reg:DF 134 f6 [343])
        (float_truncate:DF (subreg:XF (reg/v:TI 112 in0 [orig:340 v ] [340])
0))) 39 {truncxfdf2} (insn_list 3 (nil))
    (expr_list:REG_DEAD (reg/v:TI 112 in0 [orig:340 v ] [340])
        (nil)))
sym.c:28: confused by earlier errors, bailing out

tested Gentoo 3.3.2 / 3.3.6 / 3.4.4 / 4.0.2, all fail same way


-- 
           Summary: unable to find a register to spill in class NO_REGS on
                    ia64
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: vapier at gentoo dot org
  GCC host triplet: ia64-linux-gnu
GCC target triplet: ia64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24661