https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116817
Bug ID: 116817
Summary: [15 Regression] ICE on libajantv2-16.2: in
compute_live_loop_exits, at tree-ssa-loop-manip.cc:250
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed ICE on libajantv2-16.2 when building with gcc-master at
r15-3790-gdfb750798b07e7. cvise minimized it down to:
// $ cat testframe.cpp.cpp
int main_ulData0;
unsigned *main_pSrcBuffer;
int main(void) {
int iSrc = 0;
bool bData0;
for (; iSrc < 4; iSrc++) {
if (bData0)
main_pSrcBuffer[iSrc] = main_ulData0;
else
main_pSrcBuffer[iSrc] = 0;
bData0 = !bData0;
}
}
$ gcc/xg++ -Bgcc -c testframe.cpp.cpp -O3 -Wall
during GIMPLE pass: vect
testframe.cpp.cpp: In function ‘int main()’:
testframe.cpp.cpp:3:5: internal compiler error: in compute_live_loop_exits, at
tree-ssa-loop-manip.cc:250
3 | int main(void) {
| ^~~~
0x27b5813 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x27c4a45 internal_error(char const*, ...)
???:0
0x27b399a fancy_abort(char const*, int, char const*)
???:0
0x141e227 rewrite_into_loop_closed_ssa(bitmap_head*, unsigned int)
???:0
0x15eda91 (anonymous namespace)::pass_vectorize::execute(function*)
???:0
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.
$ gcc/xg++ -Bgcc -v
Reading specs from gcc/specs
COLLECT_GCC=gcc/xg++
COLLECT_LTO_WRAPPER=gcc/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/slyfox/dev/git/gcc/configure --disable-multilib
--disable-bootstrap --disable-lto --disable-libsanitizer
--disable-libstdcxx-pch --enable-languages=c,c++ --disable-libgomp
--disable-libquadmath --disable-libvtv CFLAGS='-O1 -g0' CXXFLAGS='-O1 -g0'
LDFLAGS='-O1 -g0'
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240923 (experimental) (GCC)
