https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122756
Bug ID: 122756
Summary: RISCV: ICE Segmentation fault signal terminated
program cc1
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ybni at cse dot cuhk.edu.hk
Target Milestone: ---
This code triggers ICE with `-O3 -x c -march=rv64gcv -mabi=lp64d`:
```C
long a;
void b() {
unsigned long c, d;
for (;; c = d + 2000) {
d = c;
for (; d < a; d += 2)
if (d % 2)
for (;;)
;
}
}
```
Compiler Explorer: https://godbolt.org/z/edG4Pj9fT
Crash:
```sh
internal compiler error: Segmentation fault signal terminated program cc1
```
Compiler version:
```sh
$ riscv64-unknown-linux-musl-gcc -v
Using built-in specs.
COLLECT_GCC=riscv64-unknown-linux-musl-gcc
COLLECT_LTO_WRAPPER=/data/yunboni/utils/compilers/riscv64-unknown-linux-musl/libexec/gcc/riscv64-unknown-linux-musl/16.0.0/lto-wrapper
Target: riscv64-unknown-linux-musl
Configured with:
/data/yunboni/utils/compilers/cross-riscv/.build/riscv64-unknown-linux-musl/src/gcc/configure
--build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu
--target=riscv64-unknown-linux-musl
--prefix=/data/yunboni/utils/compilers/riscv64-unknown-linux-musl
--exec_prefix=/data/yunboni/utils/compilers/riscv64-unknown-linux-musl
--with-sysroot=/data/yunboni/utils/compilers/riscv64-unknown-linux-musl/riscv64-unknown-linux-musl/sysroot
--enable-languages=c,c++ --with-arch=rv64gcv --with-abi=lp64d
--with-pkgversion='crosstool-NG 1.28.0.3_a3fef85' --enable-__cxa_atexit
--disable-libmudflap --disable-libgomp --disable-libssp --disable-libquadmath
--disable-libquadmath-support --disable-libsanitizer --disable-libmpx
--with-gmp=/data/yunboni/utils/compilers/cross-riscv/.build/riscv64-unknown-linux-musl/buildtools
--with-mpfr=/data/yunboni/utils/compilers/cross-riscv/.build/riscv64-unknown-linux-musl/buildtools
--with-mpc=/data/yunboni/utils/compilers/cross-riscv/.build/riscv64-unknown-linux-musl/buildtools
--with-isl=/data/yunboni/utils/compilers/cross-riscv/.build/riscv64-unknown-linux-musl/buildtools
--enable-lto --enable-threads=posix --enable-target-optspace --disable-plugin
--disable-nls --disable-multilib
--with-local-prefix=/data/yunboni/utils/compilers/riscv64-unknown-linux-musl/riscv64-unknown-linux-musl/sysroot
--enable-long-long
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20251118 (experimental) (crosstool-NG 1.28.0.3_a3fef85)
```
