error: no viable conversion from returned value of type 'SmallVector<int64_t, 4>' to function return type 'SmallVector<int64_t, (default) 6>'

[Tulta21]

FAILED: tools/scalehls/lib/Dialect/HLS/CMakeFiles/obj.MLIRHLS.dir/HLS.cpp.o
/usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Itools/scalehls/lib/Dialect/HLS -I../lib/Dialect/HLS -Iinclude -I../polygeist/llvm-project/llvm/include -I../polygeist/llvm-project/llvm/../mlir/include -I../include -Itools/scalehls/include -isystem tools/mlir/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -g -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fno-exceptions -fno-rtti -std=c++17 -MD -MT tools/scalehls/lib/Dialect/HLS/CMakeFiles/obj.MLIRHLS.dir/HLS.cpp.o -MF tools/scalehls/lib/Dialect/HLS/CMakeFiles/obj.MLIRHLS.dir/HLS.cpp.o.d -o tools/scalehls/lib/Dialect/HLS/CMakeFiles/obj.MLIRHLS.dir/HLS.cpp.o -c /home/wps/scalehls-hida/lib/Dialect/HLS/HLS.cpp
/home/wps/scalehls-hida/lib/Dialect/HLS/HLS.cpp:1214:10: warning: local variable 'actualFactors' will be copied despite being returned by name [-Wreturn-std-move]
return actualFactors;
^~~~~~~~~~~~~
/home/wps/scalehls-hida/lib/Dialect/HLS/HLS.cpp:1214:10: note: call 'std::move' explicitly to avoid copying
return actualFactors;
^~~~~~~~~~~~~
std::move(actualFactors)
/home/wps/scalehls-hida/lib/Dialect/HLS/HLS.cpp:1214:10: error: no viable conversion from returned value of type 'SmallVector<[...], 4>' to function return type 'SmallVector<[...], (default) 6>'
return actualFactors;
^~~~~~~~~~~~~
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1225:3: note: candidate constructor not viable: no known conversion from 'SmallVector<int64_t, 4>' (aka 'SmallVector<long, 4>') to 'std::initializer_list' for 1st argument
SmallVector(std::initializer_list IL) : SmallVectorImpl(N) {
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1235:3: note: candidate constructor not viable: no known conversion from 'SmallVector<int64_t, 4>' (aka 'SmallVector<long, 4>') to 'const llvm::SmallVector<long, 6> &' for 1st argument
SmallVector(const SmallVector &RHS) : SmallVectorImpl(N) {
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1245:3: note: candidate constructor not viable: no known conversion from 'SmallVector<int64_t, 4>' (aka 'SmallVector<long, 4>') to 'llvm::SmallVector<long, 6> &&' for 1st argument
SmallVector(SmallVector &&RHS) : SmallVectorImpl(N) {
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1250:3: note: candidate constructor not viable: no known conversion from 'SmallVector<int64_t, 4>' (aka 'SmallVector<long, 4>') to 'SmallVectorImpl &&' for 1st argument
SmallVector(SmallVectorImpl &&RHS) : SmallVectorImpl(N) {
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1209:12: note: explicit constructor is not a candidate
explicit SmallVector(size_t Size, const T &Value = T())
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1220:12: note: explicit constructor is not a candidate
explicit SmallVector(const iterator_range &R)
^
../polygeist/llvm-project/llvm/include/llvm/ADT/SmallVector.h:1231:12: note: explicit constructor is not a candidate
explicit SmallVector(ArrayRef A) : SmallVectorImpl(N) {
^
1 warning and 1 error generated.
[4882/5114] Building CXX object tools/mlir/lib/CAPI...CAPIRegisterEverything.dir/RegisterEverything.cpp.o
ninja: build stopped: subcommand failed.

[Tulta21]

已解决，原因是clang版本太低不兼容，换了一个16.0版本的clang后就好了