optimization/4994: ICE with "-fno-exceptions -O2 -mmmx -march=athlon"

[Michael Ritzert]

However the bug is still there with -fPIC:
# c++ -fno-exceptions -O2 -mmmx -march=athlon -c sidebar_widget.ii -fPIC
sidebar_widget.cpp: In member function `void
   addBackEnd::activatedAddMenu(int)':
sidebar_widget.cpp:148: insn does not satisfy its constraints:
(insn 5565 8677 9610 (set (reg/v/f:SI 29 emm0 [853])
        (reg:SI 31 emm2 [1230])) 45 {*movsi_1} (nil)
    (nil))
sidebar_widget.cpp:148: Internal compiler error in 
reload_cse_simplify_operands
   , at reload1.c:8348
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.