https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93799
Bug ID: 93799
Summary: [10 Regression] ice in
propagate_vals_across_arith_jfunc, at ipa-cp.c:2039
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc-bugs at marehr dot dialup.fu-berlin.de
CC: marxin at gcc dot gnu.org
Target Milestone: ---
The following code ICEs
```c++
struct search_param {
int total;
};
void search_trivial(search_param error_left) {
search_trivial(error_left);
search_param error_left2{error_left};
error_left2.total--;
search_trivial(error_left2);
}
void search_algo_uni(search_param error_left) { search_trivial(error_left); }
void search_algo(search_param error_left) { search_algo_uni(error_left); }
int main() { search_algo({}); return 0; }
```
https://godbolt.org/z/aPnCGi
with
```
> g++-git -O3 -c ice.cpp
during IPA pass: cp
ice.cpp:12:41: internal compiler error: in propagate_vals_across_arith_jfunc,
at ipa-cp.c:2039
12 | int main() { search_algo({}); return 0; }
| ^
0x639286 propagate_vals_across_arith_jfunc
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:2039
0x14d5f24 propagate_aggregate_lattice
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:2690
0x14d5f24 propagate_aggs_across_jump_function
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:2781
0x14d5f24 propagate_constants_across_call
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:2875
0x14d62a6 propagate_constants_topo
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:3794
0x14da490 ipcp_propagate_stage
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:3910
0x14da490 ipcp_driver
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:5899
0x14da490 execute
/home/marehr/Packages/gcc-git/src/gcc/gcc/ipa-cp.c:5992
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://bugs.archlinux.org/> for instructions.
```
This might be the same ICE as
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93763, but I reported it as a new
issue, because they have different stack-traces.
```
> g++-git -v
Using built-in specs.
COLLECT_GCC=g++-git
COLLECT_LTO_WRAPPER=/opt/gcc/gcc-git/bin/../lib/gcc/x86_64-pc-linux-gnu/10.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/marehr/Packages/gcc-git/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++ --enable-shared --enable-threads=posix
--with-system-zlib --with-isl --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--disable-libssp --enable-gnu-unique-object --enable-linker-build-id
--enable-lto --enable-plugin --enable-install-libiberty
--with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib
--disable-werror --enable-checking=release --enable-default-pie
--enable-default-ssp --enable-cet=auto --disable-boostrap
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.1 20200217 (experimental) (GCC)
```
