[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-03-02 14:22:54 UTC ---
For some reason I can never reproduce sparc bugs with cross compilers. The
original testcase doesn't fail here; the reduced one fails but with a different
error message, and it fails in instantiate_virtual_regs which is before any
head-merging ever runs:

sparcbug.i: In function âaction_button_cbâ:
sparcbug.i:57:1: error: unrecognizable insn:
(insn 7 6 8 3 (set (reg:SI 130)
        (lo_sum:SI (reg:SI 130)
            (unspec:SI [
                    (symbol_ref/f:DI ("*.LC0") [flags 0x2] <var_decl
0x7ffff6cd7f00 *.LC0>)
                ] 0))) sparcbug.i:49 -1
     (nil))

Breakpoint 2, internal_error (gmsgid=0xd6093d "in %s, at %s:%d") at
../../trunk/gcc/diagnostic.c:839
839    {
(gdb) bt
#0  internal_error (gmsgid=0xd6093d "in %s, at %s:%d") at
../../trunk/gcc/diagnostic.c:839
#1  0x0000000000bcf7cc in fancy_abort (file=<optimized out>, line=2123,
function=0xc99260 "extract_insn")
    at ../../trunk/gcc/diagnostic.c:899
#2  0x000000000081e8d3 in _fatal_insn (msgid=<optimized out>,
insn=0x7ffff6bc5990, 
    file=0xc9885b "../../trunk/gcc/recog.c", line=2123, function=0xc99260
"extract_insn")
    at ../../trunk/gcc/rtl-error.c:110
#3  0x000000000081e912 in _fatal_insn_not_found (insn=0xc99260, file=0xc9886b
"recog.c", line=2123, 
    function=0xa <Address 0xa out of bounds>) at
../../trunk/gcc/rtl-error.c:118
#4  0x00000000007ea2b4 in extract_insn (insn=0x7ffff6bc5990) at
../../trunk/gcc/recog.c:2123
#5  0x00000000006cfe1c in instantiate_virtual_regs_in_insn
(insn=0x7ffff6bc5990) at ../../trunk/gcc/function.c:1555
#6  instantiate_virtual_regs () at ../../trunk/gcc/function.c:1911

Please post the actual command line that gets passed to cc1. Also, it would be
helpful if you could load cc1 into a debugger and do the following at the crash
site in output_addr_const:

(gdb) p debug_rtx (x)

and at some higher level, also use debug_rtx to print out the insn it's trying
to print.