[Bug target/47540] ARM THUMB crash with complex numbers

["joel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47540

--- Comment #3 from Joel Sherrill <joel at gcc dot gnu.org> 2011-01-30 16:39:05 UTC ---
Test case also fails on arm-rtems4.11 4.5.2 and arm-rtems4.10 4.4.5.  It works
on arm-rtems4.9 which is 4.3.2

========================= 4.5.2

$ sh -x j
+ /opt/rtems-4.11/bin/arm-rtems4.11-gcc --version
arm-rtems4.11-gcc (GCC) 4.5.2 20101216 (RTEMS
gcc-4.5.2-3.fc14/newlib-1.19.0-1.fc14)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

+ /opt/rtems-4.11/bin/arm-rtems4.11-gcc -c -O2 -mthumb t1.c
t1.c: In function 'f':
t1.c:3:1: internal compiler error: in find_valid_class, at reload.c:704
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
+ /opt/rtems-4.11/bin/arm-rtems4.11-gcc -c -O1 -mthumb t1.c
t1.c: In function 'f':
t1.c:3:1: internal compiler error: in find_valid_class, at reload.c:704
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
+ /opt/rtems-4.11/bin/arm-rtems4.11-gcc -c -O0 -mthumb t1.c
t1.c: In function 'f':
t1.c:3:1: error: unable to find a register to spill in class 'GENERAL_REGS'
t1.c:3:1: error: this is the insn:
(insn 36 35 37 4 t1.c:3 (set (subreg:DF (reg:DC 147) 0)
        (reg:DF 0 r0)) 184 {*thumb_movdf_insn} (nil))
t1.c:3: confused by earlier errors, bailing out
+ /opt/rtems-4.11/bin/arm-rtems4.11-gcc -c -Os -mthumb t1.c

========================= 4.4.5
$ sh -x j
+ /opt/rtems-4.10/bin/arm-rtems4.10-gcc --version
arm-rtems4.10-gcc (GCC) 4.4.5 20101001 (RTEMS
gcc-4.4.5-4.fc13/newlib-1.18.0-19.fc13)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

+ /opt/rtems-4.10/bin/arm-rtems4.10-gcc -c -O2 -mthumb t1.c
t1.c: In function 'f':
t1.c:3: internal compiler error: in find_valid_class, at reload.c:700
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
+ /opt/rtems-4.10/bin/arm-rtems4.10-gcc -c -O1 -mthumb t1.c
t1.c: In function 'f':
t1.c:3: internal compiler error: in find_valid_class, at reload.c:700
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
+ /opt/rtems-4.10/bin/arm-rtems4.10-gcc -c -O0 -mthumb t1.c
+ /opt/rtems-4.10/bin/arm-rtems4.10-gcc -c -Os -mthumb t1.c

=========================== 4.3.2
$ sh -x j
+ /opt/rtems-4.9/bin/arm-rtems4.9-gcc --version
arm-rtems4.9-gcc (GCC) 4.3.2 20080827 (RTEMS
gcc-4.3.2-24.el5/newlib-1.16.0-24.el5)
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

+ /opt/rtems-4.9/bin/arm-rtems4.9-gcc -c -O2 -mthumb t1.c
+ /opt/rtems-4.9/bin/arm-rtems4.9-gcc -c -O1 -mthumb t1.c
+ /opt/rtems-4.9/bin/arm-rtems4.9-gcc -c -O0 -mthumb t1.c
+ /opt/rtems-4.9/bin/arm-rtems4.9-gcc -c -Os -mthumb t1.c