Internal compiler error in `copy_rtx_and_substitute'

[Bernhard Rosenkraenzer <bero at redhat dot de>]

This happens when trying to compile the linux kernel 2.3.39 with the CVS
version of gcc:

gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2
-fomit-frame-pointer -fno-strict-aliasing -pipe -fno-strength-reduce
-mpreferred-stack-boundary=2 -DCPU=686 -march=i686
-fno-omit-frame-pointer -c -o sched.o sched.c
sched.c: In function `__wake_up':
sched.c:695: Internal compiler error in `copy_rtx_and_substitute', at
integrate.c:2052
Please submit a full bug report.
See <URL:http://www.gnu.org/software/gcc/faq.html#bugreport> for
instructions.
cpp: output pipe has been closed

Changing the optimization flag to -O0 gives a different error:
sched.c: In function `schedule':
sched.c:599: Can't find a register in class `GENERAL_REGS' while reloading
`asm'.
sched.c: In function `show_task':
sched.c:1035: warning: format not a string literal, argument types not
checked

Preprocessor output attached.

LLaP
bero

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