https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112535
Bug ID: 112535
Summary: [14] RISC-V ICE: error: unable to find a register to
spill during RTL pass: reload
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: patrick at rivosinc dot com
Target Milestone: ---
Created attachment 56587
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56587&action=edit
-freport-bug output
> /scratch/tc-testing/tc-bisect-nov-7-2/build-rv64gc/bin/riscv64-unknown-linux-gnu-gcc
> -march=rv64gcv -mabi=lp64d -O2 red.c -freport-bug
red.c: In function 'g':
red.c:14:1: error: unable to find a register to spill
14 | }
| ^
red.c:14:1: error: this is the insn:
(insn 22 43 38 4 (set (mem:SI (subreg:DI (reg:V1DI 155 [orig:137 vect_a.17 ]
[137]) 0) [5 *_37+0 S4 A32])
(const_int 0 [0])) "red.c":13:10 207 {*movsi_internal}
(expr_list:REG_DEAD (reg:V1DI 155 [orig:137 vect_a.17 ] [137])
(nil)))
during RTL pass: reload
red.c:14:1: internal compiler error: in lra_split_hard_reg_for, at
lra-assigns.cc:1861
0xa10e93 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../../gcc/gcc/rtl-error.cc:108
0x1073958 lra_split_hard_reg_for()
../../../gcc/gcc/lra-assigns.cc:1861
0x106d339 lra(_IO_FILE*)
../../../gcc/gcc/lra.cc:2495
0x1024119 do_reload
../../../gcc/gcc/ira.cc:5973
0x1024119 execute
../../../gcc/gcc/ira.cc:6161
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/cc1ljSwT.out file, please attach this to
your bugreport
Testcase
int *a, *f;
char b, c;
int ***d;
static int ****e = &d;
void g() {
c = 3;
for (; c; c--)
if (c < 8) {
f = 0;
***e = a;
}
if (b)
***d = 0;
}
I have not attempted to bisect it yet.
-freport-bug output attached.
