https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111548
Bug ID: 111548
Summary: RISC-V Vector: ICE in validate_change_or_fail (vsetvl
pass)
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jeremy.bennett at embecosm dot com
Target Milestone: ---
Created attachment 55973
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55973&action=edit
Reproducer source code
This issue was identified building SPEC CPU 2017 602.gcc_s.
Reproducer (test.c):
a, c, d;
*b;
h() {
int e;
i();
for (;;) {
unsigned f;
char *g;
f = a;
for (; f; f--) {
if (*g == '"')
e = !e;
*b = g++;
}
if (c)
break;
f = d;
for (; d;)
if (e)
b++;
}
}
Compile with:
riscv64-unknown-linux-gnu-gcc -w -march=rv64gcv -mabi=lp64d -c -Ofast \
-ftree-vectorize --param=riscv-autovec-preference=scalable test.c
Output is:
during RTL pass: vsetvl
test.c: In function 'h':
test.c:22:1: internal compiler error: in validate_change_or_fail, at
config/riscv/riscv-vsetvl.cc:788
22 | }
| ^
0xa6ef0b validate_change_or_fail
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:788
0xa6f0bb validate_change_or_fail
/home/jeremy/gittrees/mustang/gcc/gcc/hash-set.h:64
0xa6f0bb change_insn
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:804
0x165d292 pass_vsetvl::earliest_fusion()
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:3415
0x165da61 pass_vsetvl::vsetvl_fusion()
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:3457
0x165f950 pass_vsetvl::lazy_vsetvl()
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:4373
0x165fad1 pass_vsetvl::execute(function*)
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:4413
0x165fad1 pass_vsetvl::execute(function*)
/home/jeremy/gittrees/mustang/gcc/gcc/config/riscv/riscv-vsetvl.cc:4394
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.
System information
==================
Using built-in specs.
COLLECT_GCC=riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/home/jeremy/gittrees/mustang/install/libexec/gcc/riscv64-unknown-linux-gnu/14.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with: /home/jeremy/gittrees/mustang/gcc/configure
--target=riscv64-unknown-linux-gnu
--prefix=/home/jeremy/gittrees/mustang/install
--with-sysroot=/home/jeremy/gittrees/mustang/install/sysroot
--with-pkgversion=g59d27cc55a0 --with-system-zlib --enable-shared --enable-tls
--enable-languages=c,c++,fortran --disable-libmudflap --disable-libssp
--disable-libquadmath --disable-libsanitizer --disable-nls --disable-bootstrap
--src=/home/jeremy/gittrees/mustang/gcc --enable-multilib --with-abi=lp64d
--with-arch=rv64gc --with-tune= --with-isa-spec=20191213 'CFLAGS_FOR_TARGET=-O2
-mcmodel=medany' 'CXXFLAGS_FOR_TARGET=-O2 -mcmodel=medany'
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230923 (experimental) (g59d27cc55a0)
