Having the AST tree representation closer to the source code

[Dennis Dams <dennis at research dot bell-labs dot com>]

Hi,

I'm doing some analysis for which I need the AST tree to reflect the
source code more precisely.

For example, given the following program:

int
main(void)
{
  int n, i, *p;

  p = (int *)(2*n) + i;

}

the rhs of the assignment occurs as a mult_expr in the tree, because
gcc does some factoring etc.
While for my purposes I would really prefer the rhs to occur as
literal as possible in the AST - even without implicit casts and
offset multiplications.

Are there switches in gcc that can help?
Or else, is it possible to change the workings of gcc without too much 
effort?

--Dennis.

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