[Bug middle-end/55116] [4.8 Regression] LRA failed to decompose ASHIFT

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55116

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-30 00:08:28 UTC ---
Created attachment 28566
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28566
A testcase

[hjl@gnu-tools-1 prev-gcc]$ ./xgcc -B./ -O2 -mx32 -S /tmp/x.ii 
/tmp/x.ii: In function ârtx_def* simplify_binary_operation(rtx_code,
machine_mode, rtx, rtx)â:
/tmp/x.ii:2141:3: internal compiler error: in set_address_base, at
rtlanal.c:5511
   }
   ^
0xc08dbb set_address_base
    /export/gnu/import/git/gcc-misc/gcc/rtlanal.c:5509
0xc096c7 decompose_normal_address
    /export/gnu/import/git/gcc-misc/gcc/rtlanal.c:5706
0xc097e4 decompose_address(address_info*, rtx_def**, machine_mode, unsigned
char, rtx_code)
    /export/gnu/import/git/gcc-misc/gcc/rtlanal.c:5744
0xc0981b decompose_lea_address(address_info*, rtx_def**)
    /export/gnu/import/git/gcc-misc/gcc/rtlanal.c:5754
0xb1a515 process_address
    /export/gnu/import/git/gcc-misc/gcc/lra-constraints.c:2274
0xb1b1d0 curr_insn_transform
    /export/gnu/import/git/gcc-misc/gcc/lra-constraints.c:2658
0xb1d65d lra_constraints(bool)
    /export/gnu/import/git/gcc-misc/gcc/lra-constraints.c:3409
0xb0d909 lra(_IO_FILE*)
    /export/gnu/import/git/gcc-misc/gcc/lra.c:2281
0xac0ed0 do_reload
    /export/gnu/import/git/gcc-misc/gcc/ira.c:4624
0xac10f4 rest_of_handle_reload
    /export/gnu/import/git/gcc-misc/gcc/ira.c:4736
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-tools-1 prev-gcc]$