simplify_cast() question

[Xi Wang <xi.wang@xxxxxxxxx>]

Hi,

Consider the code:

unsigned int foo(unsigned long long x)
{
	unsigned int tmp = x & 0x1fffffff;
	return tmp;
}

sparse emits:

	and.64      %r2 <- %arg1, $0x1fffffff
	ret.32      %r2

%r2 seems to be interpreted as both 64 and 32 bits.  Is this the
intended behavior?  This could bring some trouble when we add
->ctype to pseudo..

- xi
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