https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93583
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #4)
> The line where things crash is
> rtx temp = gen_reg_rtx (GET_MODE (valreg));
> but presumably valreg is just 0 here?
Yes:
(gdb) p valreg
$1 = (rtx_def *) 0x0
(gdb) p debug_gimple_stmt(stmt)
# .MEM_49 = VDEF <_45>
describe_cache.constprop.isra (l1_sizekb_36, l1_line_37);
One can debug that on gcc112 compile farm machine:
$ /home/marxin/Programming/gcc/objdir/./prev-gcc/lto1 /tmp/ice.ltrans1.o
-fltrans -quiet
during RTL pass: expand
../../gcc/config/rs6000/driver-rs6000.c: In function ‘host_detect_local_cpu’:
../../gcc/config/rs6000/driver-rs6000.c:338:25: internal compiler error:
Segmentation fault
338 | return describe_cache (l1_sizekb, l1_line, l1_assoc, l2_sizekb);
| ^
0x109138f3 crash_signal
../../gcc/toplev.c:328
0x102468b0 expand_call(tree_node*, rtx_def*, int)
../../gcc/calls.c:4672
0x1040d527 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11130
0x10260097 expand_expr
../../gcc/expr.h:282
0x10260097 expand_call_stmt
../../gcc/cfgexpand.c:2703
0x10260097 expand_gimple_stmt_1
../../gcc/cfgexpand.c:3682
0x10260097 expand_gimple_stmt
../../gcc/cfgexpand.c:3847
0x102673d3 expand_gimple_basic_block
../../gcc/cfgexpand.c:5887
0x10269f07 execute
../../gcc/cfgexpand.c:6542
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
