[Bug target/64205] [5 Regression] powerpc64-linux --with-cpu=G5 bootstrap failure

["bergner at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64205

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-01-20
                 CC|                            |bergner at gcc dot gnu.org,
                   |                            |meissner at gcc dot gnu.org,
                   |                            |uweigand at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Confirmed.  Here's a simplified test case and simplified options:

[bergner@makalu-lp1 PR64687]$ cat decode.i 
union ieee754r_Decimal32
{
  _Decimal32 sd;
  unsigned int cc0;
};

unsigned int
__decoded32 (_Decimal32 a)
{
    union ieee754r_Decimal32 d;
    d.sd = a;
    return d.cc0;
}

[bergner@makalu-lp1 PR64687]$
/home/bergner/gcc/build/gcc-fsf-mainline-pr64687-debug/gcc/xgcc
-B/home/bergner/gcc/build/gcc-fsf-mainline-pr64687-debug/gcc -O1 -mno-hard-dfp
-mcpu=power7 -S decode.i 
decode.i: In function â__decoded32â:
decode.i:13:1: error: insn does not satisfy its constraints:
 }
 ^
(insn 16 4 3 2 (set (mem/c:SD (plus:DI (reg/f:DI 1 1)
                (const_int 48 [0x30])) [0 a+0 S4 A64])
        (reg:SD 33 1)) decode.i:9 492 {movsd_hardfloat}
     (nil))
decode.i:13:1: internal compiler error: in extract_constrain_insn, at
recog.c:2246

Basically we hit this with "-O1 -mno-hard-dfp -maltivec" which matches the ICE
seen with "-mcpu=G5" and "-mno-hard-dfp -mcpu=power7".