[PATCH i386] PR47698 no CMOV for volatile mem

[Richard Henderson]

On 10/27/2011 05:17 AM, Sergey Ostanevich wrote:
> +  /* MOVCC semantics implies that source is always read which is wrong
> +     for devices I/O that are defined using volatile in C. PR47698 */
> +
> +  if (MEM_P (operands[2]) && MEM_VOLATILE_P (operands[2]))
> +    return false;

This looks to be at the wrong level.  This fix should be
tested in ifcvt.c where we attempted this.


r~