https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117190
--- Comment #6 from Frank Scheiner <frank.scheiner at web dot de> ---
(In reply to Jakub Jelinek from comment #2)
> Created attachment 59372 [details]
> gcc15-pr117190.patch
>
> Untested fix.
Unfortunately applying the patch onto gcc-15-20241020
(01f50ebfd97a7bd17a4cc94c403a8e126986c02c) makes it only worse for my use case:
```
[...]
CC init/main.o
during RTL pass: dse2
init/main.c: In function 'set_reset_devices':
init/main.c:187:1: internal compiler error: Segmentation fault
187 | }
| ^
0x17a1200 internal_error(char const*, ...)
/usr/src/gcc/gcc/diagnostic-global-context.cc:517
0xc3918f crash_signal
/usr/src/gcc/gcc/toplev.cc:321
0xc14ae0 poly_int_rtx_p(rtx_def const*, poly_int<1u, long>*)
/usr/src/gcc/gcc/rtl.h:2418
0xc14ae0 simplify_context::simplify_binary_operation_1(rtx_code, machine_mode,
rtx_def*, rtx_def*, rtx_def*, rtx_def*)
/usr/src/gcc/gcc/simplify-rtx.cc:2880
0xc1748d simplify_context::simplify_binary_operation(rtx_code, machine_mode,
rtx_def*, rtx_def*)
/usr/src/gcc/gcc/simplify-rtx.cc:2682
0xc199fc simplify_binary_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
/usr/src/gcc/gcc/rtl.h:3503
0xc199fc simplify_rtx(rtx_def const*)
/usr/src/gcc/gcc/simplify-rtx.cc:8136
0x7ce297 cselib_expand_value_rtx_1
/usr/src/gcc/gcc/cselib.cc:2154
0x7ce468 expand_loc
/usr/src/gcc/gcc/cselib.cc:1782
0x7ce180 cselib_expand_value_rtx_1
/usr/src/gcc/gcc/cselib.cc:1945
0x7cfa06 cselib_expand_value_rtx(rtx_def*, bitmap_head*, int)
/usr/src/gcc/gcc/cselib.cc:1842
0x1578119 canon_address
/usr/src/gcc/gcc/dse.cc:1157
0x15789c0 record_store
/usr/src/gcc/gcc/dse.cc:1431
0x157ab3a scan_insn
/usr/src/gcc/gcc/dse.cc:2692
0x157ab3a dse_step1
/usr/src/gcc/gcc/dse.cc:2809
0x157ab3a rest_of_handle_dse
/usr/src/gcc/gcc/dse.cc:3726
0x157ab3a execute
/usr/src/gcc/gcc/dse.cc:3799
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[3]: *** [scripts/Makefile.build:229: init/main.o] Error 1
make[2]: *** [scripts/Makefile.build:478: init] Error 2
make[1]: *** [/dev/shm/torvalds-linux/Makefile:1936: .] Error 2
make: *** [Makefile:224: __sub-make] Error 2
```
...as it already breaks early on. Haven't yet tested reverting the mentioned
commits.
