Recent TCG commit breaks PPC

[BALATON Zoltan]

Hello,

Commit 8fe35e0444be (tcg/optimize: Use tcg_constant_internal with constant 
folding) seems to break PPC emulation for me:

Thread 3 "qemu-system-ppc" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff51e7700 (LWP 22636)]
0x0000555555afd4ee in ts_are_copies (ts2=0x7fff8c008f90, ts1=0x7fff8c001510) at 
../tcg/optimize.c:68
68          return ts_info(ts)->next_copy != ts;
(gdb) bt
#0  0x0000555555afd4ee in ts_are_copies (ts2=0x7fff8c008f90, 
ts1=0x7fff8c001510) at tcg/optimize.c:68
#1  0x0000555555afd4ee in tcg_opt_gen_mov
    (s=s@entry=0x7fff8c000b60, op=op@entry=0x7fff8c6b2348, dst=140735542203664, 
src=140735542235024) at tcg/optimize.c:191
#2  0x0000555555afe05a in tcg_opt_gen_movi
    (s=s@entry=0x7fff8c000b60, temps_used=temps_used@entry=0x7ffff51e63c0, 
op=op@entry=0x7fff8c6b2348, dst=<optimized out>,
    val=<optimized out>) at include/tcg/tcg.h:731
#3  0x0000555555aff79f in tcg_optimize (s=s@entry=0x7fff8c000b60) at 
tcg/optimize.c:1189
#4  0x0000555555b13c39 in tcg_gen_code (s=0x7fff8c000b60, tb=tb@entry=0x7fffb3181380 
<code_gen_buffer+4088659>) at tcg/tcg.c:4490
#5  0x0000555555b1b485 in tb_gen_code
    (cpu=cpu@entry=0x55555651c870, pc=pc@entry=4287582720, 
cs_base=cs_base@entry=0, flags=flags@entry=24576, cflags=-16777216,
    cflags@entry=0) at accel/tcg/translate-all.c:1952
#6  0x0000555555b7c303 in tb_find (cf_mask=0, tb_exit=0, last_tb=0x0, cpu=0x0) 
at accel/tcg/cpu-exec.c:454
#7  0x0000555555b7c303 in cpu_exec (cpu=cpu@entry=0x55555651c870) at 
accel/tcg/cpu-exec.c:810
#8  0x0000555555ab5ea2 in tcg_cpus_exec (cpu=cpu@entry=0x55555651c870) at 
accel/tcg/tcg-cpus.c:57
#9  0x0000555555ab7a03 in rr_cpu_thread_fn (arg=arg@entry=0x55555651c870) at 
accel/tcg/tcg-cpus-rr.c:217
#10 0x0000555555cc355a in qemu_thread_start (args=<optimized out>) at 
util/qemu-thread-posix.c:521
#11 0x00007ffff6cc004c in start_thread () at /lib64/libpthread.so.0
#12 0x00007ffff6bf13af in clone () at /lib64/libc.so.6

This can be reproduced for example with booting AROS as described here:

http://zero.eik.bme.hu/~balaton/qemu/amiga/#aros

The segfault happens during boot.

Regards,
BALATON Zoltan