To read an RTL object from a file, call read_rtx
. It takes one
argument, a stdio stream, and returns a single RTL object.
Reading RTL from a file is very slow. This is no currently not a problem because reading RTL occurs only as part of building the compiler.
People frequently have the idea of using RTL stored as text in a file as an interface between a language front end and the bulk of GNU CC. This idea is not feasible.
GNU CC was designed to use RTL internally only. Correct RTL for a given program is very dependent on the particular target machine. And the RTL does not contain all the information about the program.
The proper way to interface GNU CC to a new language front end is with
the ``tree'' data structure. There is no manual for this data
structure, but it is described in the files `tree.h
' and
`tree.def
'.