https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117037
Bug ID: 117037
Summary: gcc14.2.1 riscv64-unknown-linux-gnu-g++ build opencv
5.x error
Product: gcc
Version: 14.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bigmagicreadsun at gmail dot com
Target Milestone: ---
When compiling OpenCV 5.x with riscv64-unknown-linux-gnu-g++, the following
error occurs.
set(CMAKE_C_FLAGS_INIT "-march=rv64imafdcv -mabi=lp64d -O3 -static")
set(CMAKE_CXX_FLAGS_INIT "-march=rv64imafdcv -mabi=lp64d -O3 -static")
opencv/modules/dnn/src/layers/reduce_layer.cpp: In member function 'void
cv::dnn::ReduceLayerImpl::ReduceAllInvoker<Op>::operator()(const cv::Range&)
const [with Op = cv::dnn::ReduceLayerImpl::ReduceProd<signed char>]':
/Local/home/zhaofujin/opencv/opencv/modules/dnn/src/layers/reduce_layer.cpp:290:14:
internal compiler error: in vect_create_partial_epilog, at
tree-vect-loop.cc:5866
290 | void operator()(const Range& r) const CV_OVERRIDE {
| ^~~~~~~~
0x7f5a1f485082 __libc_start_main
../csu/libc-start.c:308
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.
make[2]: *** [modules/dnn/CMakeFiles/opencv_dnn.dir/build.make:1181:
modules/dnn/CMakeFiles/opencv_dnn.dir/src/layers/reduce_layer.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
The code where the error occurs in reduce_layer.cpp is as follows:
ReduceAllInvoker(const Mat& src_, Mat& dst_) : src(src_), dst(dst_) {
auto shape_src = shape(src);
n_reduce = std::accumulate(shape_src.begin(), shape_src.end(), 1,
std::multiplies<int>());
loop_size = n_reduce;
total = 1;
cost_per_thread = 1;
}
void operator()(const Range& r) const CV_OVERRIDE {
int start = r.start;
int end = r.end;
const dtype* p_src = src.ptr<const dtype>();
dtype* p_dst = dst.ptr<dtype>();
for (int i = start; i < end; ++i) {
Op accumulator(n_reduce, *p_src);
for (int l = 0; l < loop_size; ++l) {
accumulator.update(p_src[l]);
}
p_dst[i] = accumulator.get_value();
}
}
This error seems to be related to g++'s generation logic for RVV.
