xf. http://gcc.gnu.org/ml/gcc/2007-11/msg00293.html
Mark Mitchell wrote:
> The reason I want to make that assumption is that the part of this where
> the representation is in question is once we reach RTL, right?

The representation in GIMPLE should also be discussed IMVHO. For
GIMPLE Alex has invented DEBUG_STMT, which has the same properties as
DEBUG_INSN in RTL (with one noteworthy difference, namely that having
note-like GIPMLE statements is a totally new concept while DEBUG_INSN
is just a wannabe-real-insn INSN_NOTE).

Gr.
Steven

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