[Bug target/52488] avr-*: internal compiler error: in extract_insn, at recog.c:2123

[ralf_corsepius at rtems dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52488

--- Comment #9 from Ralf Corsepius <ralf_corsepius at rtems dot org> 2012-03-13 06:16:03 UTC ---
(In reply to comment #8)
> (In reply to comment #7)

> You can look up in the device datasheet to see how much RAM it has. 
Well, datasheets is one thing, GCC's internal notion is yet another.

> Or do you want GCC to print out how much RAM each device has?
No, I would expect GCC to print its rationale for this rejection.

e.g. something like 
"allocating 2050 byte of stack exceeds maximum stack size (1024 bytes) ..."

> > Well, my view is different: The avr's default set of multilib variants is
> > non-suitable as general default set of multlib variants. It probably is
> > suiteable as set of multilibs for bare-metal targets, but does not meet the
> > demands of OSes. 
> 
> Do you have recommendations? Or better still, a patch?

We will see, I am currently looking into implementing custom multilibs for
avr-RTEMS, which may result into a patch addressing this as a side-effect.
However, the avr's multilib implementation diverges from what is used almost
elsewhere in GCC to an extend, this is a tedious.