[MLton] mlton code generation
Mon, 14 Mar 2005 12:35:40 -0500 (EST)
> Is there an easy way to instruct mlton to somehow show the code that it is
> generating for a user function.
If you mean finding the exact sequence of C/assembly generated due to a
fun f (...) = ...
in the source program, then you might try using the profiling
infrastructure. When a program is compiled with profiling, the front-end
embeds pseudo-operations denoting the entry and exit of each function,
which are preserved by the various optimizations and transformations, and
should delineate the code correspoinding to a particular source function
in the generated code.
Unfortunately, translating back from the MLtonProfileNNN labels to source
code locations is something handled automatically by the mlprof tool, but
could be a bit cumbersome to do by hand. It probably wouldn't be too hard
to augment either to compiler or mlprof to do this. Then you could find
all the MLtonProfileNNN labels associated with the function of interest
and look for those labels.
You might also have luck with the -keep ssa2 -keep machine flags in
conjunction with a -profile flag. The SSA2 intermediate language
displays Enter/Leave pseudo-operations with the name of source
function/locations while the Machine intermediate language uses
MLtonProfileNNN labels. These two intermediate languages are only one
lowering apart, so you might be able to find a non-profile label in the
SSA2 IL near the beginning of the function you in which you are
interested, and hope to find the same label in the Machine IL, now near
the corresponding MLtonProfileNNN label. Now you can look for that
MLtonProfileNNN label in the generated C or assembly.