On INTEGER_CST

[Ian Lance Taylor]

"Paulo J. Matos" <pocm@soton.ac.uk> writes:

> INTEGER_CST seems to have TREE_INT_CST_LOW and TREE_INT_CST_HIGH
> fields (tree.def). Each has 32 bits.

No, each has type HOST_WIDE_INT.  On a 64-bit host they will be 64
bits.

> 1 - Should I use ints for these fields?

I don't understand the question.

> 2 - If the INTEGER_CST is negative, is the negative part only in one
> of the high or low fields, i.e. low is always unsigned and high is
> always signed? If not, how do I know if the constant is signed or
> unsigned?

Negative numbers are sign extended through both the high and low
fields.  That said, you need to look at the type of the constant to
know whether you have a negative number or a very large positive
number.

Ian