https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115452
Bug ID: 115452
Summary: ICE when dump stv2 for gcc.target/i386/pr70322-2.c
with -march=cascadelake
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: liuhongt at gcc dot gnu.org
Target Milestone: ---
gcc -m32 -march=cascadelake ./gcc/testsuite/gcc.target/i386/pr70322-2.c -mstv
-mno-bmi -S -Os -fdump-rtl-stv2-details
./gcc/testsuite/gcc.target/i386/pr70322-2.c: In function ‘foo’:
./gcc/testsuite/gcc.target/i386/pr70322-2.c:12:1: internal compiler error: RTL
check: expected code 'reg', have 'subreg' in rhs_regno, at rtl.h:1934
12 | }
| ^
0x88ef75 rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int,
char const*)
./gcc/rtl.cc:770
0x96be78 rhs_regno(rtx_def const*)
./gcc/rtl.h:1934
0x96cd8d rhs_regno(rtx_def const*)
./genrtl.h:38
0x96cd8d convert_op
./gcc/config/i386/i386-features.cc:1056
0x1af7711 convert_insn
./gcc/config/i386/i386-features.cc:1468
0x1af9808 convert
./gcc/config/i386/i386-features.cc:1987
0x1af9808 convert_scalars_to_vector
./gcc/config/i386/i386-features.cc:2536
0x1af9808 execute
./gcc/config/i386/i386-features.cc:2750
------------cut from i386-features.cc:1056---------------
if (dump_file)
fprintf (dump_file, " Preloading operand for insn %d into r%d\n",
INSN_UID (insn), REGNO (tmp));
--------------cut end-------------------------------
Looks like tmp is SUBREG.
