[Bug target/71733] ICE in vmx test cases with -mcpu=power9

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71733

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2016-07-02
           Assignee|unassigned at gcc dot gnu.org      |bergner at gcc dot gnu.org
   Target Milestone|---                         |7.0
     Ever confirmed|0                           |1

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Confirmed.  Here's a minimal test case.  With -mno-vsx, we should be disabling
direct move, which we don't seem to be doing.


bergner@genoa:~/gcc/BUGS/sawdey/altivec$ cat bug.i 
typedef __attribute__((altivec(vector__))) unsigned char vec_t;
vec_t
foo (vec_t src)
{
  return src;
}
bergner@genoa:~/gcc/BUGS/sawdey/altivec$
/home/bergner/gcc/build/gcc-fsf-mainline-debug/gcc/xgcc
-B/home/bergner/gcc/build/gcc-fsf-mainline-debug/gcc/ -O0 -mcpu=power9 -mno-vsx
-S bug.i 
bug.i: In function ‘foo’:
bug.i:6:1: error: insn does not satisfy its constraints:
 }
 ^
(insn 18 24 30 (set (mem/c:V16QI (plus:DI (reg/f:DI 31 31)
                (const_int 48 [0x30])) [0  S16 A128])
        (reg:V16QI 79 2 [ src ])) bug.i:4 1205 {*altivec_movv16qi}
     (nil))
bug.i:6:1: internal compiler error: in extract_constrain_insn_cached, at
recog.c:2223
0x10c46563 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/rtl-error.c:108
0x10c465ff _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/rtl-error.c:119
0x10bc9e1f extract_constrain_insn_cached(rtx_insn*)
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/recog.c:2223
0x114b259f insn_default_length(rtx_insn*)
       
/home/bergner/gcc/gcc-fsf-mainline-base/gcc/config/rs6000/rs6000.md:6424
0x1073866f shorten_branches(rtx_insn*)
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/final.c:1184
0x10741eff rest_of_handle_shorten_branches
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/final.c:4537
0x10741fbf execute
        /home/bergner/gcc/gcc-fsf-mainline-base/gcc/final.c:4566