[PATCH, aarch64] Add prefetch support

[Richard Henderson]

On 11/14/2014 09:11 PM, Gopalasubramanian, Ganesh wrote:
> +    const char * pftype[2][10]
> +      = { {"PLDL1STRM", "PLDL3KEEP", "PLDL2KEEP", "PLDL1KEEP"},
> +	  {"PSTL1STRM", "PSTL3KEEP", "PSTL2KEEP", "PSTL1KEEP"},
> +	};

The array should be

  static const char * const pftype[2][4]

I've no idea where you got that "10" from, espectially since...

> +    gcc_assert (IN_RANGE (locality, 0, 3));

... you've constrained it right here.

> +    sprintf (pattern, "prfm\\t%s, %%a0",
> +	     pftype[INTVAL(operands[1])][locality]);

There's no point in the buffer or the sprintf.
The text is short enough to repeat whole pattern in the array:

  static const char * const pftype[2][4] = {
    {
      "prfm\\tPLDL1STRM, %a0",
      ...
    },
    {
      "prfm\\tPSTL1STRM, %a0",
      ...
    }
  };

  ...
  return pftype[INTVAL(operands[1])][INTVAL(operands[2])];


r~