[Bug target/22081] New: ICE for bad powerpc hard float move

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

GCC 3.4 (branch and all releases) gets an internal compiler error with
the test case on powerpc64-linux for both -m32 and -m64 with -O2:
                                                                                
elm3b11% /opt/gcc-nightly/3.4/bin/gcc -c -O2 -m64 bug.c
bug.c: In function `func3':
bug.c:55: error: insn does not satisfy its constraints:
(insn:HI 90 163 91 6 (set (reg/v:SF 66 ctr [orig:130 b ] [130])
        (reg/v:SF 66 ctr [orig:142 a ] [142])) 306 {*movsf_hardfloat} (nil)
    (nil))
bug.c:55: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:391
                                                                                
GCC 3.3.5 doesn't get the error, so it's a regression.  GCC 4.0.x and
mainline don't get the error; it was fixed this this patch to mainline
by dalej:
                                                                                
  http://gcc.gnu.org/ml/gcc-cvs/2004-02/msg01205.html
                                                                                
I'll submit the backported patch for the 3.4 branch but wanted to have
a PR to reference first.

-- 
           Summary: ICE for bad powerpc hard float move
           Product: gcc
           Version: 3.4.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: janis at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
                CC: dalej at gcc dot gnu dot org,gcc-bugs at gcc dot gnu dot
                    org
 GCC build triplet: powerpc-linux
  GCC host triplet: powerpc-linux
GCC target triplet: powerpc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22081