[PATCH] proposed fix for PR40987 if-conversion bug on HWI32 hosts

[Eric Botcazou]

> This proposed fix compares GET_MODE_BITSIZE of the mode of the
> destination variable with HOST_BITS_PER_WIDE_INT to see if
> compile-time arithmetic may be inadequate, and in that case
> performs an early failure return from the function.

Won't this disable the transformation for 'long long' variables but small 
constants as well?  If so, can this be avoided by using host_integerp at the 
appropriate places instead?

-- 
Eric Botcazou