https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116781
Bug ID: 116781
Summary: [lra][avr] internal compiler error: in
cselib_invalidate_regno, at cselib.cc:2545
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
Created attachment 59149
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59149&action=edit
pr45830.c: C test case
This ICE does not occur with the old reload (-mno-lra):
$ avr-gcc pr45830.c -S -mlra -O2 -funroll-loops
during RTL pass: postreload
pr45830.c: In function 'bar':
pr45830.c:79:1: internal compiler error: in cselib_invalidate_regno, at
cselib.cc:2545
79 | }
| ^
0x62b4a3 cselib_invalidate_regno
../../../source/gcc-master/gcc/cselib.cc:2545
0x62b8f7 cselib_invalidate_rtx(rtx_def*)
../../../source/gcc-master/gcc/cselib.cc:2699
0x62b938 cselib_invalidate_rtx_note_stores
../../../source/gcc-master/gcc/cselib.cc:2710
0x62c87c cselib_record_sets
../../../source/gcc-master/gcc/cselib.cc:3037
0x62d00d cselib_process_insn(rtx_insn*)
../../../source/gcc-master/gcc/cselib.cc:3194
0x7f083a10ed8f __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
0x7f083a10ee3f __libc_start_main_impl
../csu/libc-start.c:392
The respective lines in cselib.cc read:
cselib_invalidate_regno (unsigned int regno, machine_mode mode)
{
unsigned int endregno;
unsigned int i;
/* If we see pseudos after reload, something is _wrong_. */
gcc_assert (!reload_completed || regno < FIRST_PSEUDO_REGISTER
|| reg_renumber[regno] < 0);
Target: avr
Configured with: ../../source/gcc-master/configure --target=avr --disable-nls
--with-dwarf2 --with-gnu-as --with-gnu-ld --disable-shared
--enable-languages=c,c++
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240918 (experimental) (GCC)
