Compiler output:
$ gcc -mno-sse testcase.c
testcase.c: In function 'foo':
testcase.c:3: error: SSE register return with SSE disabled
gcc: Internal error: Segmentation fault (program cc1)
Please submit a full bug report.
See <http://bugs.gentoo.org/> for instructions.
(is the diagnostics correct?)
------ testcase.c ------
int foo(int i)
{
return (__float128)i;
}
------------------------
Tested revisions:
r158095 - crash
4.5 r158131 - crash
4.4 r158133 - crash
4.3.4, 4.2.4, 4.1.2 - OK
Backtrace:
#0 ix86_cannot_change_mode_class (from=TFmode, to=DImode,
regclass=SSE_FIRST_REG) at /mnt/svn/gcc-4_5/gcc/config/i386/i386.c:25160
#1 0x0000000000776200 in simplify_subreg_regno (xregno=21, xmode=TFmode,
offset=0, ymode=DImode) at /mnt/svn/gcc-4_5/gcc/rtlanal.c:3293
#2 0x00000000007b2bf1 in simplify_subreg (outermode=DImode, op=0x7ffff7fb5920,
innermode=TFmode, byte=0) at /mnt/svn/gcc-4_5/gcc/simplify-rtx.c:5260
#3 0x00000000007b333e in simplify_gen_subreg (outermode=DImode,
op=0x7ffff7fb5920, innermode=TFmode, byte=0) at
/mnt/svn/gcc-4_5/gcc/simplify-rtx.c:5449
#4 0x00000000005e5c57 in operand_subword_force (op=0x7ffff7fb5920, offset=0,
mode=TFmode) at /mnt/svn/gcc-4_5/gcc/emit-rtl.c:1412
#5 0x0000000000609e3f in emit_move_multi_word (mode=TFmode, x=0x7ffff5865fc0,
y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3342
#6 0x0000000000608af3 in emit_move_insn (x=0x7ffff5865fc0, y=0x7ffff7fb5920)
at /mnt/svn/gcc-4_5/gcc/expr.c:3472
#7 0x00000000005f07fb in copy_to_reg (x=0x7ffff7fb5920) at
/mnt/svn/gcc-4_5/gcc/explow.c:608
#8 0x00000000005e5cc0 in operand_subword_force (op=0x7ffff7fb5920, offset=0,
mode=TFmode) at /mnt/svn/gcc-4_5/gcc/emit-rtl.c:1422
#9 0x0000000000609e3f in emit_move_multi_word (mode=TFmode, x=0x7ffff5865fa0,
y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3342
#10 0x0000000000608af3 in emit_move_insn (x=0x7ffff5865fa0, y=0x7ffff7fb5920)
at /mnt/svn/gcc-4_5/gcc/expr.c:3472
...
#110289 0x0000000000609e3f in emit_move_multi_word (mode=TFmode,
x=0x7ffff7fb5960, y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3342
#110290 0x0000000000608af3 in emit_move_insn (x=0x7ffff7fb5960,
y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3472
#110291 0x00000000005f07fb in copy_to_reg (x=0x7ffff7fb5920) at
/mnt/svn/gcc-4_5/gcc/explow.c:608
#110292 0x00000000005e5cc0 in operand_subword_force (op=0x7ffff7fb5920,
offset=0, mode=TFmode) at /mnt/svn/gcc-4_5/gcc/emit-rtl.c:1422
#110293 0x0000000000609e3f in emit_move_multi_word (mode=TFmode,
x=0x7ffff7fb5940, y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3342
#110294 0x0000000000608af3 in emit_move_insn (x=0x7ffff7fb5940,
y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3472
#110295 0x00000000005f07fb in copy_to_reg (x=0x7ffff7fb5920) at
/mnt/svn/gcc-4_5/gcc/explow.c:608
#110296 0x00000000005e5cc0 in operand_subword_force (op=0x7ffff7fb5920,
offset=0, mode=TFmode) at /mnt/svn/gcc-4_5/gcc/emit-rtl.c:1422
#110297 0x0000000000609e3f in emit_move_multi_word (mode=TFmode,
x=0x7ffff7fb57c0, y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3342
#110298 0x0000000000608af3 in emit_move_insn (x=0x7ffff7fb57c0,
y=0x7ffff7fb5920) at /mnt/svn/gcc-4_5/gcc/expr.c:3472
#110299 0x000000000070f0f4 in emit_libcall_block (insns=0x7ffff7edba20,
target=0x7ffff7fb57c0, result=0x7ffff7fb5920, equiv=0x7ffff7fa87e0)
at /mnt/svn/gcc-4_5/gcc/optabs.c:3984
#110300 0x0000000000716900 in expand_float (to=0x7ffff7fb57c0,
from=0x7ffff7fb6720, unsignedp=0) at /mnt/svn/gcc-4_5/gcc/optabs.c:5152
#110301 0x00000000006109e2 in expand_expr_real_2 (ops=0x7fffffffdaf0,
target=0x7ffff7fb57c0, tmode=<value optimized out>, modifier=EXPAND_NORMAL)
at /mnt/svn/gcc-4_5/gcc/expr.c:7879
#110302 0x000000000056c0e6 in expand_gimple_stmt_1 (stmt=0x7ffff7fb78c0) at
/mnt/svn/gcc-4_5/gcc/cfgexpand.c:1905
#110303 expand_gimple_stmt (stmt=0x7ffff7fb78c0) at
/mnt/svn/gcc-4_5/gcc/cfgexpand.c:1978
#110304 0x000000000056d831 in expand_gimple_basic_block (bb=0x7ffff7fab1a0) at
/mnt/svn/gcc-4_5/gcc/cfgexpand.c:3384
#110305 0x0000000000571ac0 in gimple_expand_cfg () at
/mnt/svn/gcc-4_5/gcc/cfgexpand.c:3834
#110306 0x0000000000726bab in execute_one_pass (pass=0x11687a0) at
/mnt/svn/gcc-4_5/gcc/passes.c:1568
#110307 0x0000000000726e35 in execute_pass_list (pass=0x11687a0) at
/mnt/svn/gcc-4_5/gcc/passes.c:1623
#110308 0x000000000081d2f5 in tree_rest_of_compilation (fndecl=0x7ffff7fad600)
at /mnt/svn/gcc-4_5/gcc/tree-optimize.c:413
#110309 0x00000000009a18a1 in cgraph_expand_function (node=0x7ffff7edd4e0) at
/mnt/svn/gcc-4_5/gcc/cgraphunit.c:1548
#110310 0x00000000009a45b0 in cgraph_output_in_order () at
/mnt/svn/gcc-4_5/gcc/cgraphunit.c:1721
#110311 cgraph_optimize () at /mnt/svn/gcc-4_5/gcc/cgraphunit.c:1870
#110312 0x00000000009a47d5 in cgraph_finalize_compilation_unit () at
/mnt/svn/gcc-4_5/gcc/cgraphunit.c:1096
#110313 0x00000000004b08d3 in c_write_global_declarations () at
/mnt/svn/gcc-4_5/gcc/c-decl.c:9519
#110314 0x00000000007cbe35 in compile_file (argc=3, argv=0x7fffffffdf88) at
/mnt/svn/gcc-4_5/gcc/toplev.c:1065
#110315 do_compile (argc=3, argv=0x7fffffffdf88) at
/mnt/svn/gcc-4_5/gcc/toplev.c:2417
#110316 toplev_main (argc=3, argv=0x7fffffffdf88) at
/mnt/svn/gcc-4_5/gcc/toplev.c:2459
#110317 0x00007ffff636ba3d in __libc_start_main () from /lib/libc.so.6
#110318 0x0000000000494d29 in _start ()
--
Summary: [4.4/4.5/4.6 Regression] ICE: SIGSEGV (too deep
recursion) with -mno-sse and __float128
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zsojka at seznam dot cz
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43701
