Colin,
Please file this as a bug report in our SourceForge
tracker system. On a mailing list it will simply be
forgotten and on this USER mailing list I doubt there
are any users who can help you with this.
Greets,
Maarten
> I have encountered an internal compiler error when compiling
> a particular bit of code for the 8051 (mcs51) using the large memory
> model and a re-entrant function.
>
> If the small memory model is used or if the function is made
> non-reentrant, then it compiles successfully (although the generated
> code is incorrect! I will post separately about the code generation
> error).
>
> However, this particular re-entrant function has no local variables,
> parameters, or return value. I think that SDCC is, however, creating a
> temporary stack variable for the value of the "(now - updated)"
> expression, and perhaps it is confused since SDCC thought it was not
> going to require storage for any local variables.
>
>
> Compiler Error
> ==============
>
> $ ~/bin/sdcc/bin/sdcc -mmcs51 -c --model-small bad.c
> $ ~/bin/sdcc/bin/sdcc -mmcs51 -c --model-large bad.c
> bad.c:16: error 9: FATAL Compiler Internal Error in file 'gen.c' line
> number '441' : getFreePtr should never reach here
> Contact Author with source code
>
>
> SDCC version
> ============
>
> I am using SDCC svn revision 5287, though I also tested rev 5252, which
> also exhibits the same error.
> $ ~/bin/sdcc/bin/sdcc --version SDCC : mcs51 2.8.4 #5287 (Dec 16 2008)
> (UNIX)
>
>
> Source Code (bad.c)
> ===================
> ------------------------------------------------------------
> #include <stdint.h>
>
> uint32_t sleep_timer_get(void);
>
> int32_t remaining;
> uint32_t updated;
> uint32_t now;
>
> static void do_test(void) __reentrant
> {
> while (1)
> {
> now = sleep_timer_get();
>
> remaining -= (now - updated) & 0xFF;
> updated = now;
> }
> }
> ------------------------------------------------------------
>
>
> Regards,
> Colin
>
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