invalid address bug in egcs optimizer (snapshot)

[Michal Jaegermann <michal at ellpspace dot math dot ualberta dot ca>]

On Linux/Alpha the latest egcs snapshot egcs-19980721
which identifies itself as:

gcc version egcs-2.91.51 19980714 (gcc2 ss-980609 experimental)

(it this identification a bug as well?), configured with --enable-haifa,
has the following problem.

While compiling Linux kernel 2.0.33, after 'make modules' this happens:


make[2]: Entering directory `/usr/src/linux-2.0.33/drivers/net'
gcc -D__KERNEL__ -I/usr/src/linux-2.0.33/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -pipe -mno-fp-regs -DMODULE  -c -o slhc.o slhc.c
cc1: memory violation at pc=12010dc8c rp=12010dda4 (bad address = 11f7fffb8)
{standard input}: Assembler messages:
{standard input}:0: Warning: end of file not at end of a line; newline inserted
{standard input}:531: Error: inappropriate arguments for opcode `ldl'
gcc: Internal compiler error: program cc1 got fatal signal 11
make[2]: *** [slhc.o] Error 1
make[2]: Leaving directory `/usr/src/linux-2.0.33/drivers/net'
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/usr/src/linux-2.0.33/drivers'
make: *** [modules] Error 2


Dropping an optimization level to -O allows to recompile this object
file.  Other kernel source files compile fine with -O2 and resulting Linux
kernel boots and seems to be ok after five minutes of use. :-)

This is on alpha EB64+

cpu			: Alpha
cpu model		: EV4
cpu variation		: 0
cpu revision		: 0
cpu serial number	: Linux_is_Great!
system type		: EB64+
system variation	: EB64+
system revision		: 0
system serial number	: MILO-0000
cycle frequency [Hz]	: 0
timer frequency [Hz]	: 1024.00
page size [bytes]	: 8192
phys. address bits	: 34
max. addr. space #	: 63
BogoMIPS		: 271.58
kernel unaligned acc	: 0 (pc=0,va=0)
user unaligned acc	: 0 (pc=0,va=0)

I include preprocessed file slhc.c.

  Michal Jaegermann
  michal@ellpspace.math.ualberta.ca
  michal@harddata.com

shlc.pre.c.gz