https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120652
Bug ID: 120652
Summary: [16 Regression] RISC-V: ICE in require, at
machmode.h:323 with rv64gcv_zvl256b
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ewlu at rivosinc dot com
Target Milestone: ---
Created attachment 61635
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61635&action=edit
freport-bug output
Testcase:
unsigned n;
char ab[6];
unsigned ac;
unsigned ae;
int ak(int bb) {
bd:
for (ac = -17; ac != 16; ac++) {
unsigned be = 95;
if (be <= n) {
char *bg = &ab[1];
*bg ^= bb;
} else {
ae--;
for (n = 8; 0;)
goto bd;
}
}
return 0;
}
int main() {
ak(7);
return 0;
}
Command:
$
/scratch/ewlu/daily-upstream-build/build-gcv/bin/riscv64-unknown-linux-gnu-gcc
-I/scratch/ewlu/ci/compiler-fuzz-ci/csmith-build/include -fsigned-char
-fno-strict-aliasing -fwrapv -march=rv64gcv_zvl256b -mrvv-vector-bits=zvl -O3
red.c -o rv64gcv.out -w -freport-bug
during RTL pass: expand
red.c: In function 'main':
red.c:20:5: internal compiler error: in require, at machmode.h:323
20 | int main() {
| ^~~~
0x2e0b1d6 internal_error(char const*, ...)
../../../gcc/gcc/diagnostic-global-context.cc:517
0xd0d3ed fancy_abort(char const*, int, char const*)
../../../gcc/gcc/diagnostic.cc:1803
0xc3da74 opt_mode<machine_mode>::require() const
../../../gcc/gcc/machmode.h:323
0xc3de2f opt_mode<machine_mode>::require() const
../../../gcc/gcc/poly-int.h:1383
0xc3de2f riscv_vector::expand_select_vl(rtx_def**)
../../../gcc/gcc/config/riscv/riscv-v.cc:4218
0x21c7d22 gen_select_vldi(rtx_def*, rtx_def*, rtx_def*)
../../../gcc/gcc/config/riscv/autovec.md:1344
0x134db6c maybe_expand_insn(insn_code, unsigned int, expand_operand*)
../../../gcc/gcc/optabs.cc:8257
0x134db6c expand_insn(insn_code, unsigned int, expand_operand*)
../../../gcc/gcc/optabs.cc:8288
0x11b21d3 expand_fn_using_insn
../../../gcc/gcc/internal-fn.cc:318
0xef32cf expand_call_stmt
../../../gcc/gcc/cfgexpand.cc:3097
0xef32cf expand_gimple_stmt_1
../../../gcc/gcc/cfgexpand.cc:4264
0xef32cf expand_gimple_stmt
../../../gcc/gcc/cfgexpand.cc:4411
0xef95b6 expand_gimple_basic_block
../../../gcc/gcc/cfgexpand.cc:6472
0xefb66f execute
../../../gcc/gcc/cfgexpand.cc:7223
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Preprocessed source stored into /tmp/ccfIJhBg.out file, please attach this to
your bugreport.
Godbolt: https://godbolt.org/z/W3YEWf6Pb
