Paul Edwards wrote:
> >> /* Store in OUTPUT a string (made with alloca) containing an
> >> assembler-name for a local static variable named NAME.
> >> LABELNO is an integer which is different for each call. */
> >>
> >> #ifdef TARGET_PDPMAC
> >> #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
> >> { \
> >> (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10); \
> >> sprintf ((OUTPUT), "__%d", (LABELNO)); \
> >> }
> >
> > How does this work? ASM_FORMAT_PRIVATE_NAME is not supposed
> > to completely ignore the NAME argument, the function may well
> > be called with the same LABELNO but different NAME strings,
> > and this must not result in conflicting symbols ...
>
> I have compiled the entire GCC and not come up with any duplicate
> static function names, so I think the number is always unique.
Hmm, I see that in the 3.2.x code base this is indeed true.
However, in later compilers ASM_FORMAT_PRIVATE_NAME is used
for other purposes by the middle-end, not just static function
or variable names. You definitely can get number collisions
in later compilers ...
> > At this point, you may refer to "current_function_decl" to
> > retrieve information about the function currently being output.
> > In particular, you can retrieve the original source-level name
> > associated with the routine via DECL_NAME (current_function_decl).
>
> Thanks a lot! I couldn't use that directly, but this:
Why not? I'd have thought something like
printf ("%s", IDENTIFIER_POINTER (DECL_NAME (current_function_decl)));
should work fine ...
> c:\devel\gcc\gcc\config\i370>cvs diff -r 1.37 i370.c
B.t.w. if you use the -u or -c option to cvs diff, the diffs are
a lot more readable ...
> < mvs_function_name);
> ---
> > fname_as_string(0));
This is a bit problematic as fname_as_string is a function defined in
the C front-end. If you were e.g. to build the Fortran compiler, your
back-end gets linked against the Fortran front-end instead of the C
front-end, and that function simply will not be there. Generally,
the rule is that the back-end must not directly call front-end routines.
In any case, for C source code fname_as_string does pretty much
nothing else than what I suggested above ...
Bye,
Ulrich
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
[email protected]
